Home

STABLAB 2013 USER MANUAL

1. 8 1 2 SNAPSHOT MANAGER The second icon on the documentation tab is the Snapshot manager el where the taken snapshots can be exported to a file or can be deleted from the model in order to reduce model file size Multiple selected pictures can be saved and deleted at the same time The name of the images can also be edited by double clicking the name of the image www stablab net SSS SSSSssw csdg gt SSE ss SS A 1 Figure 2 Figure 3 Figure Figure Groe ooo SSS a SSSR SSS An 8 1 3 MODEL INFORMATION With using the third icon on the DOCUMENT tab the model information can be viewed or can be exported to a file The model information window shows the most important features of the model like Number of bars Number of supports Total weight of the structure etc The mass surface and the length can be viewed for each section in the model The model information can be shown based on the full model or on the current view if the model view shows only a part of the full model using the sub model view Model information n JES Define model information Based on the full model 0 Based on the current view Main data Number of bars 4 Total weight of structure t 3 46 Number of support 43 Total Fe to be painted m2 fin Total length m 325 Name Mazs t Surbace m2 Length rn IFE 500 1 355 30 04 15 25 HEA 400 1 503 2d 12 www stablab net
2. An JS Tehakombinsa i Teherkombin ci 1 Teherkombin ci 3 Teherkombin ci 3 Teherkombin ci 3 Teherkombin ci 3 Teherkombin ci 3 7 5 ANALYSIS RESULTS 7 5 1 RESULT TYPES For the line elements the following analysis results are available gt First and second order calculations gt Deformations on the finite element nodes in the global coordinate system XYZ all components X only displacements in the X direction Y only displacements in the Y direction Z only displacements in the Z direction gt Equilibrium signed summation of the internal nodal force components and the appropriate external force www stablab net a BLAB and reaction components all the values should be zero which means the model is in equilibrium in the calculated deformed state gt Internal forces on the end nodes of each finite element in the local coordinate system N axial force Vy shear force in the local y direction Vz shear force in the local z direction Mx torsional moment 99 My bending moment about the local y axis Mz bending moment about the local z axis B bimoment gt Reactions on the support nodes in the global coordinate system gt R all the reaction forces and moments gt RR all the reaction forces gt RRR all the reaction moments gt Rx re
3. STABLAB 2013 USER MANUAL 9 www stablab net a BLAB CONTENT MeN eT al CCS Ci pil OW EEE EE E E E EE E E EE 5 1 1 Installing the soft ware ccc cence NERES 5 he LOCI LOC CS eae E seers eee sna E EEE RENG 6 1 2 1 Web protection Status oo ccc ccc ccc cece cee e en nnees 8 Lo The Main WOW eererrsr ee ferra E EE EE ce eme ore eeeeacey ER 8 kol Tbe Startup WIndow 2 i0cehectese uation ECEE AA REARS 8 letel Lie rap an WiINGOW oc2cceteeces eenedecueerecenneesuceseeeueces et 9 Lise WS PCW ea S cane gear oedenadeessemeteeeteeedeeaneaeance 10 oer Mie TADS cogoccuaasonieeyesssseenuseaces se Sant E E S 14 Leon DMG SUCE Dat scccaracacsaensnesseodadenadeccncanawnanenadeadsoaeenar 16 led The status Da erranari aiaa E a E E D E E E a nese 16 1 3 7 The windows of object tree diagnostics results and ODPECE PIOPOL ICE arra EAE REE EEEE E ee eee ha ees 22 1 4 General structure of dialogue windows ccc eee cece 26 1 5 General functions for tables cccmsmemmmmmmmmmmmm ow e teens 28 1 6 Hot keys ccc ccc cece e tunnan ee 29 2 File handling 0 ccc cena se 31 2 1 Basics wo cece eee ee 31 2 2 File types 000 ee 31 3 Model View 22 0 cc chee eee eee eee nee eee 32 3 1 Basics wo ccc cece nee e eee enn eee ens ane ee een 32 3 2 Model Views ssssanenasennnan enaa ee 32 3 3 Selection mame ee es ee 36 3 4 Portions manager
4. qa n ee Ti 38 3 5 Object names and cS MUO ma 4 3 6 Dimensions esp cess see eee 43 3 7 Measure 006 48 4 Drawing geomelry ccc cece ccc cect eee e oa mma 50 Ay ASUS on qeeotas ays chens nee eoras ate coe ns avecurac neeasers Aueaepasausecenss 50 www stablab net 2 a BLAB 4 2 Coordin te SYSUCINS 20 sir ccerdiacneawn boned aedea eid nrndercanenddaeneow bs 50 4 2 1 User coordinate system ccsjscrsrccuetascssvetessaneateacasentrses 51 4 2 2 Local coordinate system of bar elements 32 4 3 Defining action points 2 ccc cece teen ene e ne eees 54 Ae DANI E EE E ER E EE E EE ee lee nee 54 ad MOUII DO earren aR EE E EE EE ERGE 56 oO Lay OTS aee e E A EE 61 F STRUCT al MOG Cli nc cscacaencseacasecsuaranoutoacanecssatessueunccanueaess 63 Sell o CS be hoe ee en ep eae eee dep ee ee ees E N 63 3 2 LIne MCI D CLS 2 dccanancimcanedsdensaaasinsadededebscg0ceGedudstes snes 63 J21 Creating Line MeMmOCrs sacccexcennesessenssdarsenneeaeeenossepecse 63 3 2 2 Ha nched MWWEMUDETS cious dann casedaaeravedane iirinn rriena dese ds 66 Jaleo Tapered MEMDELS oe ai ceeesctecsasaeeswenconcsusnavaiweeaeueroes 69 Som ikea cde ee ee ee ee ee ee ee re A eee 73 Duet SEL POLLS E E EE 74 Pee POM SUP POT c t nee sedet het ane eee ned eeeeekders aeenenehageseeetaees 75 5 4 2 Line SUPPOTFt 0 cee T ool 8 2 5 5 Link elements 0 0 na E 84 6 Structural l
5. v Contour surface G v a BLAB DOCUMENTATION 8 1 THE DOCUMENT TAB All icons which related to the documentation are placed in the DOCUMENT tab 1 1 CREATING SNAPSHOTS The first icon C on the DOCUMENT tab can be used to take a snapshot of the model Create snapshot 1 Figure Dimension of picture A4 Portrait g Height mm 247 Width mm 180 Letter size Creates Modify The size of the snapshot can be set and a dashed rectangle shows which part of the model would appear on the picture The model can be moved or rotated to fit into the dashed rectangle www stablab net SzerkCAD Kovacs G File Edit View Options Help Geometry Structural members Loads Analysis Model Content Portions Manager MAS a ay Portions LAE frame la b tip a g g b E Dmeaarafpcire E Show hidden parts of the structure translucently A4Landscape SS Height mm e gt Width mm 247 Line 1 E Bar member 1 Name B2532 Section properties IPE 270 Section IPE 270 Release start point Folytonos Release end point Folytonos Eccentricity y mm 0 Eccentricity z mm 0 Rotate deg 0 Number of finite elemen Automatic Bow imperf L v 0 Bow imperf L w 0 Element type Beam column with warping Element group Layer Folia 1 Jk X fast yY foo zp foes
6. www stablab net a BLAB With the first four functions the visibility of the dockable windows can be switched With the SIZES OF OBJECTS function the size of the objects can be changed Object dimensions In OPTIONS menu the following settings can be found SAVE UPDATE LANGUAGE and DIAGNOSTICS Save If Autosave is clicked the program automatically performs a save periodically in accordance with the adjusted number of minutes If backup is clicked StabLab creates a backup file after manual save 1s performed The backup model file can be used as a normal model by removing the bak extension Update StabLab looks for an available new version on the web at every startup It can be turned off The check for a new version can be www stablab net a BLAB performed manually by clicking on the Search for updates now icon Language The language of the user interface can be set here StabLab has to be restarted after changing The language of the user interface after next start Diagnostics Minimal distance of structural elements 1 lt Error lt Warning lt 1000 Before the analysis the program checks the possible modeling mistakes There are two different levels to worn the user for the possible modeling mistakes www stablab net a BLAB gt Error In case of the distance between the endpoints of two members is more than O but less than t
7. BLAB M Reinforce concrete or Composite sections There is only one choice General beam column i the General beam column type this is the commonly used 12 degree of freedom finite element Element group the members can be sorted out into element groups for various purposes selection dominant results sensitivity analysis ee if new element group is needed the GROUPS OF STRUCTURAL MEMBERS dialogue can be called by pressing the button next to the combo Number of finite elements the required number of finite elements used on the member in the analysis can be set The default automatic option gives a sufficient result in the most cases Local eccentricity member eccentricity can be defined in the local coordinate system y z of the member and the section can be rotated about the local coordinate x At the bottom of this dialog there is an instruction and command area for guiding the user IT SHOULD BE NOTED THAT NOT ONLY THE ECCENTRIC AXIAL FORCE PRODUCES INFLUENCE IN THE ANALYSIS ADDITIONAL BENDING MOMENTS BUT THE ECCENTRIC BENDING AND TORSIONAL MOMENTS ADDITIONAL BENDING AND TORSIONAL MOMENTS AND BIMOMENT 5 2 2 HAUNCHED MEMBERS The created members can be strengthened if necessary by using tural members Loads k a Haunch Haunch Heunch function www stablab net a BLAB The haunch can only be used for members with I type IPE HEA welded I
8. y mm o z mm o J eee www stablab net e 4 Ss E G wt WA NA A a BLAB The second way is to give the exact distances of the start and end points of the line load from the member s end points Using the setting of Position of ql q2 there are 2x3 6 possible option to define a partial line load The Position of ql set to From end A has 3 options and setting it to From end B has also 3 options Position of qyalong the line x4 Position of q2 along the line x2 q A B X4 Position of q1along the line x1 Position of q2 along the line x2 Position of q1along the line x4 Position of q2 along the line x2 This is a flexible way for numerical input the line load positions Eccentricity can be applied on the line load also The effect of the selected coordinate system the applied local eccentricity type and values are the same as point support 5 4 1 POINT SUPPORT www stablab net a BLAB By clicking the il icon the attributes of the selected line load fill out the parameters of the line load window even if it was set by the draw function 6 4 3 SURFACE LOAD re allude oS a FF Surface load Surface loads can be defined using the same method like in point or in line loads No surface moment loads can be placed 6 4 4 LOAD TRANSFER SURFACE Load Transter surface Load transfer surface is a special surface
9. direction For beams 15 99 with single curvature the axis x is always the tangent In case of vertical reference line column members the local axis y has the same direction as the global axis Y the direction of the local axis z depends on the placement of the column position of the start and end points The interpretation and signs of the inner forces on a member is defined by its local coordinate system and the mentioned general sign convention as described in the following figure www stablab net a BLAB 4 3 DEFINING ACTION POINTS Action points snap points can be set by moving the cursor on the icon on the right side of the bottom status bar You can find the description about the snap point settings above in Status bar section 1 3 6 THE STATUS BAR 4 4 DRAWING The functions for drawing described below are collected on the GEOMETRY tab Draw line 7 Simple line drawing First select the start point Then select the end point H Polyline drawing First select the start point Then select the next points Press ESC to interrupt line drawing Draw rectangle with lines i Draw rectangle Select the corner point Select the opposite corner 2 Draw leaning rectangle in the space Select the corner point Select end point of the side of the rectangle Select third point of the rectangle Draw Circle S Draw circle by radius Select the centre point of th
10. installation Without administrative rights you cannot install the hard lock driver and those dll files which are indispensable for the system You will have to set the language of setup The StabLab will use this language for the first time you start but you may switch to another language later During installation the instructions of the setup shall be followed step by step The installing program will copy the elements of the software into the Directory you have specified then it will position the Menu of the program onto the selected place of the START menu Finally the install shield will place the starting icon onto the desktop The last step of the setup is the hard lock driver installation This has no progress signal so you will have to wait while it finishes As a default both 32 and 64 bit Windows operating systems are able to provide 2 GB RAM for the 32 bit applications like StabLab is today When the computer has more than 2 GB RAM physically than with the following changes in the configuration www stablab net 5 a BLAB he boot ini file of the Windows operating system ener 3 GB will be accessible for StabLab Change the configuration for Windows Vista and Windows 7 operating systems To extend the available memory run the following from the command prompt bcdedit set increaseuserva 3072 to switch back run the following from the command prompt bcdedit deletevalue increaseuserva The configurati
11. or checked the Show hidden parts of the structure translucently checkbox at the bottom of the PORTIONS MANAGER www stablab net From GEOMETRY to ANALYSIS in every tab the selected submodel will be visible To make the whole model visible again click the FULL VIEW icon Model Content Portions Manager 3 3 SELECTION Objects can be selected on the graphical window in the object tree or by the additional selection options As a general rule only the visible objects can be selected graphically accordingly the same action can result in different selection on different tabs or model views A selected object change to unselected by clicking on it while pressing the SHIFT button The Esc button always unselects all objects www stablab net a BLAB The basic selection modes and their operation are the followings gt simple graphical selection click on the object on the graphical window by the left mouse button All objects will be selected which graphical symbol intersects the imaginary line set up perpendicular to the viewing camera plane at the clicking point It means that the selection depends on the size of the graphical symbol of the objects and note that the covered objects will be selected as well window selection holding down the left button and moving the mouse will create the window It is completed when the mouse button is released The actual size of the window is continually seen on the scre
12. sIm file extension is associated with the StabLab these files can be opened by double click 2 2 FILE TYPES The following file types are handled in StabLab SIm the StabLabModel file native binary file type It can be opened with or without results The result file is saved to a separate file with slr StabLabResult extension but this file cannot be opened solely Open and save SIm the StabLabModel file created by autosave functionality AutoSave settings can be edited in the OPTIONS menu SIm bak the StabLabModel backup file Backup save settings can be edited in the OPTIONS menu Backup file is created at every manual save and stores the previous saved version of the model If necessary bak extension can be deleted and backup model used as a normal model The following file types can be opened in StabLab anf StruCad text file type csf old ConSteel version text file type ConSteel 2 x 3 x csm ConSteel binary file type ease Tekla Structures ASCII file dxf AutoCad text file type scl BoCad text file type snf StruCad text file type www stablab net a BLAB 3 MODEL VIEW 3 1 BASICS The transparent and multipurpose model views are very important to the engineer since these views provide the first graphical model survey opportunity Accordingly the first and most important objective of the model views is to feedback the user about the objects placed yield a visual proof that t
13. the origin the direction of X and Y axis 7 gt Set the standing of the UCS identical to the local coordinate system of the selected plane with origin placed into the first node of this plane ey Xl Set the direction of the axis Y by two points YI Set the direction of the axis X by two points Set the direction of the axis Z by two points Z Y VV WV 4 Reverse the direction of the selected axis 4 2 2 LOCAL COORDINATE SYSTEM OF BAR ELEMENTS The reference line of bar members defines the axis x of the 14 99 local coordinate system of the bars The direction of the axis x is given by the start J and end K node of the reference line In the basic case the local coordinate system of a bar can be determined considering its reference line x identical to the global axis X In this case the direction of local axes y and z are identical to the global axes Y and Z The position of the cross section on the bar is the following the reference line goes through its centre of www stablab net a BLAB gravity and the section YZ system coincides with the local 66 29 yz system of the bar In case of a generally positioned beam member not column with vertical reference line the plane defined by the local xz system takes always vertical position and the axis z points towards the positive Z
14. 9 a BLAB gt Scaling spin the middle mouse button forth and back or use the and buttons on the keyboard or hold down the ALT key and the right mouse button gt Zoom window window drawing by the left mouse button while pressing SHIFT ALT keys gt Hotkeys for vie o Ctrl 1 Switch to top view Ctrl 2 Switch to front view Ctrl 3 Switch to side view Ctrl 4 Switch to axonometric view Ctrl 5 Perpendicular to actual raster plane Ctrl 0 Quick zoom all O O O 1 3 3 THE MENU In StabLab the menu does not contain many commands since the main functionality is placed to the structured tabs and side bars and the applicability and modeling efficiency does not really need to duplicate the functions However five important function groups appear here the FILE handling some EDIT options undo redo VIEW and diagnostics OPTIONS for settings for saving updating selecting language and for model diagnostics and HELP In FILE menu New model Model attribute Open Ctrl O Save Ctrl New model New model can be created www stablab net a BLAB Model attribute Model description can be changed Model description can be entered at first by creating a new model StabLab test modell Open Save Save As The functions are according to their names In EDIT menu the common functions can be found Ctrl 2 Ctrl Cut Ctrl X Copy Ctrl C Paste Ctrl V In VIEW menu
15. ARE PLACED ECCENTRICALLY ON THE REFERENCE LINE OF THE MEMBER EXCEPT THE SYMMETRICAL TAPERING THIS ECCENTRICITY CAUSES ADDITIONAL EFFECTS IN THE ANALYSIS RESULTS DUE TO THE ECCENTRIC POSITION OF THE SECTIONAL FORCES FOR INSTANCE AT THE BEAM TO COLUMN CONNECTION POINT OF A FRAME WITH TAPERED BEAMS AND OR COLUMNS THE EQUILIBRIUM OF THE IN PLANE BENDING MOMENTS EXISTS ONLY IF THE ADDITIONAL MOMENTS FROM THE ECCENTRIC AXIAL FORCES ARE TAKEN INTO ACCOUNT www stablab net a BLAB 5 3 MATERIALS New material grades can be defined as one of the three different types of material steel concrete and concrete reinforcement Steel material The latter is only used for the rebar reinforcement of concrete or composite cross sections New materials can also be created with arbitrary parameters Name of steel Parameters of material plkg m 7850 E N mm 210000 v 0 30 a 1 C 0 000012 In StabLab only elastic material is considered in the analysis so the calculation results are only affected by the elastic modulus Poisson factor density if the self weight of the structure is considered and temperature expansion factor if temperature load is applied www stablab net Parameters of material p kg m3 Ecm N mm a 1 C ie oe IMPORTANT TO NOTE THAT IN CASE OF BAR MEMBERS BEAMS COLUMNS THE MATERIAL IS THE PARAMETER OF THE CROSS SECTION OF THE MEMBER SO THE CURRENT MO
16. can be created on the LOADS tab ANALYSIS TAB Geometry Structural members Loads Analysis be fs Fistorder Loadcombination 1 Deformation XYZ Daam 0 y7 The structural analysis types can be set and executed the results can be viewed and labeled in various forms DOCUMENT TAB The functions on the DOCUMENT tab allow of the creation of the snapshot and contain a model information tool www stablab net a BLAB 1 3 5 THE SIDE BAR Save model Undo Redo Settings for the coordinate system and snapping grids Top view Front view Side view Isometric view Perpendicular to raster view Line view visualization of the model Wireframe visualization of the model Hidden line view visualization of the model Solid view visualization of the model PPM EaR SE Move point and edge L u C7 Move Copy the selected objects Mirror the selected objects Rotate the selected objects Select all objects Deselect all objects Invert selection Select by properties Fit view Ctrl 0 The side bar contains the mostly used functions for modeling 1 3 6 THE STATUS BAR A k x 500 Y o00 zp L 0021 jj by YH Gn amp Step 250 The first field is a progress bar shows the progress of the actions www stablab net a BLAB The next 3 icons on the status bar A K are for specifying the interpretation of the coordinates during drawing modeling actions while values are entered man
17. change the H1 and H2 values click the icon The values will be changed and selecting again the member for tapering the sizes of the tapering will change adequately The rules for the beam eccentricity of the tapered member relates to the axis of the originally positioned member to be tapered Set beam eccentricity Hi ace he centa of me oO aie er secuton TO Te axis of me team Place the centroid of the smaller section to the axis of the beam Place the centroid of the bigger section to the axis of the beam Place the centroid of the original section to the axis of the beam 1 Place the centroid of the smaller section to the axis of the beam the center of smaller H value of the tapered member will be positioned to the axis of the original beam 2 Place the centroid of the bigger section to the axis of the beam the center of bigger H value of the tapered member will be positioned to the axis of the original beam 3 Place the centroid of the original section to the axis of the beam the edge of the tapered member is coincident with the original member end and the tapering will start from this position The relative position of the tapering can be z the left side of the tapered member will be parallel to the axis of the originally placed member symmetric or z the right side of the tapered member will be parallel to the axis of the originally placed member These definitions regulate the directions of the offset of the gi
18. found on the left side bar or they can be reached by right mouse button click on the graphical window 3 4 PORTIONS MANAGER PORTIONS MANAGER is a great tool to manage different but related parts of the model ie floors columns bracings beams etc This function can be achieved on the PORTIONS MANAGER tab New portions can be added by clicking the NEW PORTION icon 2 Before do so select the parts of the model which will belong to the portion www stablab net The portions can be arranged into folders New folder can be created by licking the NEWFOLDER icon 1 Model Content Portions Manager MB ERED To turn on portion check in the check box in front of name of the portion More portions can be turned on at the same time If the Show hidden parts of the structure translucently check box 6 is clicked at bottom of the PORTIONS MANAGER tab then the hidden parts of the model is also shown but those parts a translucent www stablab net at the same time a BLAB Any objects of the structural model can be part of more portions To modify a previously defined Portion first select the relevant parts of the model which will be the subject of the modification then click on the name of the part model you are going to modify and finally click on the MODIFY icon 3 File Edit View Options Help I wv H p j be E CEECEE Merr BEAGBAarR se Geometry Structural members Lo
19. has two tabs www stablab net a BLAB MODEL CONTENT TAB Model Content Portions Manager B Model H Layer Material Section Bar member Support types Point support Release types Line load Load group Load case Load combination By defaults this tab contains all the predefined basic object types which are necessary for building up a structure While modeling each new object materials sections loads members supports etc will appear in the tree object structure in the appropriate group Selecting any of the objects it will be highlighted selected in the model space Multiple selections of objects are possible in this tree Eccentricity ylmm 0 Eccentricity z mm 0 oO C ekx Y 61000 www stablab net S TABLAB PORTIONS MANAGER tab Model Content Portions Manager TEFEN T E i hun US Columns S 00 Storeys J6 Level 12000 Show hidden parts of the structure translucently Please find the description of this tab in the 3 2 MODEL VIEWS and in the 3 4 PORTIONS MANAGER chapters below Diagnostic window In case of a geometrical or modeling mistakes like overlapping two or more object missing supports etc are detected the Diagnostic windows visibility will switch ON automatically showing the name of problematic objects in a tree structure x g Possible error There is overlap between bars H B228 B19
20. sections and the shape of the haunch is considered as half of a welded I section with one flange with decreasing web height On the dialogue panel the length L height h web thickness tw flange width b flange thickness tf and the characteristics of the haunch should be set Haunch on bar Ej 1 Parameters L imm h imm tw imm b imm EF imm Characteristics of the haunch Select start point of the haunch on the beam The position of the haunch is set by simply clicking on the member the start point where the height of the haunch is full and the direction point of the haunch It should be noted that if the start point is a common end point of more members this is the usual case for instance at a beam to column connection point then this point should be approached and clicked on the member to be haunched The characteristics of the haunch denote the appropriate side of the haunch on the member according to the direction of its local z axis In the case of usual beam position it results the followings gt lower www stablab net gt upper gt symmetric THE HAUNCHES CAN BE SELECTED AND MODIFIED IN THE PARAMETER TABLE AS SEPARATE OBJECTS 1500 IMPORTANT TO KNOW THAT FOR THE HAUNCHED PART OF THE MEMBER NEW SECTIONS ARE CREATED DURING THE AUTOMATIC FINITE ELEMENT GENERATION WHICH CONSIST OF THE ORIGINAL SECTION AND THE HAUNCH WITH APPROPRIATE WEB HEIGHT HESE NEW SECTIONS ARE P
21. status of line visibility settings Visibility of pins end releases Visibility of the 2 dimensional shapes Switching these 2 dimensional shapes non visible their surrounding lines might still be visible accordingly to the status of line visibility settings Visibility of supports Visibility of link elements Visibility of initial bow imperfection Visibility of point line and surface loads Visibility of load transfer surfaces Switching these load transfer surfaces non visible their surrounding lines might still be visible accordingly to the setting of visibility of the x lines Visibility of distributed surface loads Visibility options of the grid and the local coordinate system 4 www stablab net a BLAB ie Visibility of the grid Visibility of the axes of the local coordinate systems of structural members beams and columns Visibility of the axes of local coordinate systems of supports Visibility of the axes of local coordinate systems of link elements Visibility of the axes of the local coordinate systems of the load transfer surfaces When the visibility of the object is off the axes of the object also will not be visible Visibility options of object names why When the visibility of the object is off Visibility of the number of finite elements Visible only on the Analysis tab Visibility of the name of bar elements Visibility of the name of supp
22. the licenses third column shows username of the user who checked out the license in the action column two types of button can be www stablab net 7 a BLAB appeared with button license can be checked out with button license can be released After the license selection the main window of StabLab start automatically 1 2 1 WEB PROTECTION STATUS Icon on the left corner of the status bar shows the status of the web connection Color of the icon means the following gt SIF connection is fine StabLab connected to the license server properly gt SIF connection is pending Connection is terminated recently In case the connection is not restored within two minutes the status turns to lost connection gt ME connection is lost All of the modeling and analysis functions are locked but the model can be saved 1 3 THE MAIN WINDOW The main window consists of six separate parts containing different functionalities The graphical window is the area for the 3D structural modeling the menu contains some important commands the tabs from left to right lead the engineer through the steps of structural analysis the side bar contains functions of grids views most commonly used transformations and selections the status bar makes the drawing phases easy and the object and parameter tables at the right gives always sophisticated information about the model making fast modifications possible 1 3 1 THE STARTUP WINDOW A
23. was described above Rotate selected objects Select the objects for rotation Copy Copy structural members C Move Copy loads Number of copies 1 KH Copy supports ct Apply Join points ik fe Select the Move or Copy option for the transformation The number of copies can be selected Set the center of rotation Set reference point of rotation Set the direction point or type in the rotation angle and click on the APPLY button The effects of the options are the same as it was described above www stablab net a BLAB The further modifying functions are on the GEOMETRY tab Sizing of the selected objects Select objects to sizing Set the sizing center the sizing reference point and the sizing multiplier point the distances of the sizing reference point and the sizing multiplier point to the sizing origin point determines the sizing factor The sizing will be performed The length and depending on the sizing origin maybe the position of the objects will be changed The length of the line loads will be changed proportionally s D Curve selected line element Select the edge for bend Set the insert point Refract the selected line element Select the edge to refract and the insert point along the axis of the selected object Set the new position of the selected point The original object will be broken into two parts The coordinates of the new position of the selected point al
24. 0 Diagnostics Select Delete Cose _ The first type of diagnostic results is the error messages appearing in red color www stablab net a BLAB The second type of the diagnostic result is the possible errors in yellow color By clicking on any of the object name in tree structure and pressing the SELECT button the selected object will be highlighted in the model space You can select more objects at the same time clicking their name while pressing the SHIFT or CTRL key The selected object can be erased by pressing DELETE button at the bottom of the Diagnostic window or using the DELETE key on the keyboard Object properties window Selecting one object in the model space all the relevant properties will appear in this window The values of the parameters can be overviewed and in most cases these parameters can be changed Eccenticty 2imm 0 Rotate 0 en Automatic In the lower table all the selected objects and sub object appear and after expanding one object all the parameters of it can be seen and modified if possible In case of multiple objects www stablab net a BLAB selection only the identical parameters appear however the different ones can also be changed to identical 1 4 GENERAL STRUCTURE OF DIALOGUE WINDOWS Several dialogue windows especially the most important ones on the STRUCTURAL MEMBERS and LOADS tabs show same structure in order to make easy
25. 300 www stablab net a BLAB Rotating the column with 30 degree Selecting any of the above eccentricity types for positioning a support changing the eccentricity of the supported object the support will keep the originally given relative position from the new position of the supported object and will keep the orientation defined by the applied coordinate system for placing this support WARNING BE AWARE THAT SINCE THE FINITE ELEMENT FOR THE STEEL BEAMS AND COLUMNS HAS 7 DOFS THE POINT SUPPORT ALSO HAS 7 DOFS THE 7 DOF REPRESENTS THE WARPING OF THE CROSS SECTION ACCORDINGLY IF A CROSS SECTION ON A CERTAIN PLACE IS CONSIDERED TO FIXED FOR WARPING FOR INSTANCE IN HEAVILY STIFFENED JOINTS THE 7 DOF SHOULD BE FIXED IN JOINTS CONSISTING SEVERAL MEMBERS ESPECIALLY WHEN MEMBER ECCENTRICITIES ARE PRESENT IT IS RECOMMENDED TO APPLY WARPING SUPPORT 5 4 2 LINE SUPPORT Geometry Structural members Loads Analysis L gF erel akz Line support www stablab net ci ar There are two default types for line supports the Fixed and the Pinned It is also possible to define a new line support by giving the attributes of constrains as it is needed Line supports Name of support model L5 sr zz Degrees of freedom Free Semitigid Stiffness kN mm m kNm rad m Fema i T 3 E ip By positioning a line support the effect of the applied coordinate system an
26. DIFICATION SHOULD BE APPLIED FOR THE APPROPRIATE CROSS SECTION THIS FEATURE ALLOWS THE DEFINITION OF CROSS SECTIONS WITH MULTIPLE MATERIALS E G COMPOSITE SECTION ACCORDINGLY IF IDENTICAL CROSS SECTIONS WITH DIFFERENT MATERIAL ARE LIKED TO BE USED IN ONE MODEL THEN MULTIPLE CROSS SECTION DEFINITION IS NEEDED 5 4 SUPPORTS There are two types of supports in StabLab point support and line support Point supports can be placed on any part of a line member predefined points are not needed end points or snap points can be used Line supports can be assigned to existing x local A Supports can be placed according to the global lines or user coordinate system Placing supports according to the member local coordinate system is very useful feature when working with sloping members The visibility of the local coordinate system can be turned on with the Visibility of the coordinate systems option and also the name of the axes can be shown on the screen using the appropriate options of the Visibility of labels functions www stablab net S TABLAB 5 4 1 POINT SUPPORT Geometry Structural members Loads Analysis After selecting the coordinate system the type of the support has to be selected from the list box There are several point supports types predefined By positioning the used coordinate system determines the Orientation of constrains of the support Using the Global Local
27. LACED ECCENTRICALLY ON THE REFERENCE LINE OF THE MEMBER EXCEPT THE SYMMETRICAL HAUNCH TYPE www stablab net a BLAB THIS ECCENTRICITY CAUSES ADDITIONAL EFFECTS IN THE ANALYSIS RESULTS DUE TO THE ECCENTRIC POSITION OF THE SECTIONAL FORCES FOR INSTANCE AT THE BEAM TO COLUMN CONNECTION POINT OF A FRAME WITH HAUNCHED BEAMS AND OR COLUMNS THE EQUILIBRIUM OF THE IN PLANE BENDING MOMENTS EXISTS ONLY IF THE ADDITIONAL MOMENTS FROM THE ECCENTRIC AXIAL FORCES ARE TAKEN INTO ACCOUNT 5 2 3 TAPERED MEMBERS Tapered members are frequently used in the economic design of steel framed structures so the fast and simple modeling of tapered members is of high importance For the definition of tapered member first a line member with welded I or H box or cold formed C section should be created in the model Hot rolled and other shape of Macro section can t be tapered rears Loads Analysis isla With the Tapered member function the section height of these sections can be set to linearly varying along the member length www stablab net a BLAB First the user has to specify the parameters and beam eccentricity options for the member to be tapered on the TAPERED MEMBER dialogue Specify the start H1 and end section height H2 independently of the original section height of the cross section The start value for section height applied at the start point of the member the end value applied at the other end To
28. T NAMES AND RENUMBERING Names and labels are used for the better organization of the different objects in the model and for the better transparency of the documentation The names and numbers of the objects are generated automatically while modeling The following name and renumbering options are available gt numbering of finite element points generated fully automatically the user can t influence the process gt names of structural element these are generated automatically while the user creates copies structural objects beam column consisting of a prefix and a number for instance B1 for a bar element These names appear on the object tree in the right side table The names can be modified by the RENUMBER SELECTED OBJECTS tool on the STRUCTURAL MEMBERS tab Using this function a specific prefix and a start number can be defined and a direction can be set in which the renumbering will be processed On the finite element view these names denote the numbering of the finite elements of the members www stablab net a BLAB gt names of structural supports releases and links these names show the type of the placed support release or link objects for instance Fixed or yy zz w Renumbering the objects To renumbering the objects first select the relevant objects then click on the RENUMBER SELECTED OBJECTS icon on the STRUCTURAL MEMBERS tab _ Object type Prefix of name Star
29. action force in the in the global X direction gt Ry reaction force in the in the global Y direction gt Rz reaction force in the in the global Z direction gt Rxx reaction moment about the global X direction gt Ryy reaction moment about the global Y direction gt Rzz reaction moment about the global Z direction gt Static eigenvalues and corresponding eigenshapes on the finite element nodes in the global coordinate system 7 5 2 VISUALIZATION OPTIONS The results of the performed analysis are usually a huge amount of data so the efficient handling of it has great importance There should be opportunities for global overview and for obtaining accurate detailed information about a certain part or problem There are two main possibilities for the demonstration of the analysis results the graphical visualization and the result tables www stablab net a BLAB for the general functionality of tables used in StabLab see section 1 5 GENERAL FUNCTIONS FOR TABLES The two visualization options are obviously in strong connection and can be manipulated by the functions placed on the upper part of the ANALYSIS tab The four combos contain the following selection options from left to right Geometry Structural members Loads Analysis be Firstorder Load combination 1 Deformation XYZ E Dam f 7 gt selection of analysis type discusse
30. ads Analysis J amp a2 Model Content Portions Manager a Gi CEEE a O09 Portions OA Framel E Show hidden parts of the structure translucently different xyz Action point different Ref line of ecc different Eccentricity reference 0 Reference line Eccentricity y 0 Eccentricity z 0 Layer F lia_1 www stablab net 0 owk x 17750 Add selected elements to portion Assign only selected elements to portion Modify height h mrm Y 44000 cancel ok t erie nf Ser The MODIFY PORTION window will appear with the following options a BLAB gt Add selected elements to portion By clicking the OK button the selected members will be added to the active portion When in the selection some member already belongs to the actually modified portion then it will have no additional effect gt Remove selected elements from portion All those selected elements will no longer belong to the modified portion gt Assign only the selected elements to portion The modified portion will contain only the selected elements Renaming the Portion can be done by clicking the name of the portion and click on RENAME icon 5 Portion can be deleted by clicking by clicking the name of the portion and click on DELETE icon 4 3 5 OBJEC
31. bLab linear eigenvalue analysis is performed considering one parameter conservative loading and that the geometric stiffness matrix depends linearly on the load factor K Af 2K f 5 www stablab net a BLAB In this case the eigenvalue analysis can be written in the following form K 2K JU 0 6 The solutions are certain critical load factors buckling loads factor Mor which make the second order stiffness matrix singular and corresponding displacements buckling shapes U The possible buckling shapes which can be calculated by this eigenvalue analysis are basically influenced by the considered second order effects which are determined by the applied finite element In case of beam column structures the 7 DOF finite elements have the capability to consider all modes of global buckling shapes flexural buckling torsional buckling lateral torsional buckling and any interactions of these 7 4 4 BUCKLING SENSITIVITY Buckling sensitivity analysis is a very useful function to assist the global stability design Buckling sensitivity gives a review about the eigenshapes of the structure and gives for every member the relevant eigenshape which is the best for the buckling analysis The summary view shows the crucial members for buckling considering all the available load combination and buckling modes by analyzing the bucking deformation energy accumulated in the certain members www stablab net
32. can be set and applied as a load www stablab net S TABLAB Geometry Structural members Loads Analysis Ter TIDE Change in length Change in length of bar Parameters Change in length dL 10 Tension force can be applied on bar members as a load Geometry Structural members Loads Analysis OF p T oala la Tension force j Parameters Tension force F i00 E a 6 5 GLOBAL IMPERFECTIONS Three types of global imperfection can be applied on the whole model www stablab net S TABLAB Geometry Structural members Loads Analysis Ee TEDE El Global imperfections J 6 5 1 NOTIONAL LOAD Initial imperfections can be taken into account by the application of notional loads On the basis of the selected load groups the notional loads will be generated automatically in the selected load combinations Direction of the notional loads can be defined automatically or can be set for every load combination independently Notional load initiat sway Application of eigenshape V Apply notional load Multiplication factor for magnitude of notional load Ni Considered load combinations and directions To Load combinations Direction lv Load combination 1 Automatic M Load combination 2 Automatic Iv Load combination 3 X www stablab net a BLAB 6 5 2 INITIAL SWAY The fi
33. ches tapered columns tension braces etc 1s completely separated from the calculation model which is an automatically generated sophisticated finite element model used by the structural analysis It follows that the engineer does not need to deal with the calculation model he she can concentrate solely on the direct productive labour building the real structural model IT SHOULD BE KEPT IN MIND THAT THE ENGINEER SHOULD BE AWARE OF THE FEATURES POSSIBILITIES AND LIMITATIONS OF THE APPLIED ANALYSIS MODEL ALREADY AT THE MODELLING STAGE BECAUSE THE MISUNDERSTANDING OF THE MODELLING OPPORTUNITIES CAN LEAD TO UNEXPECTED ANALYSIS AND DESIGN RESULTS All the functionality connecting with the structural modeling are placed on the STRUCTURAL MEMBERS tab 5 2 LINE MEMBERS 5 2 1 CREATING LINE MEMBERS In StabLab the line members with steel thin walled reinforced concrete and composite cross section can be modeled The members depending on the placement can be columns or beams The column is a special position line member which is always vertical so the placement is simpler because only the height should be defined The dialogue allows the following modeling options for creating members www stablab net ee Fa S TABLAB 5 Draw the reference line of the member draw as a line segment or continuous line draw as an arc by center point start point and angle 3 points or start point endpoint and tan
34. d in section 7 4 ANALYSIS TYPES gt selection of load combination or load case gt selection of result type discussed in section 7 5 1 RESULT TYPES gt selection of type of view All the model view options discussed in section 3 2 MODEL VIEWS are applicable on the result graphics Moving the slide beside the combos the scaling of the results can be adjusted on the graphics In case of partial or submodel view the graphics and the tables show only the results of the actual model part Three types of result tables can be viewed Extreme values by members select the maximum and minimum values for each structural members ies User defined values show the values belonging to the markers defined by the user discussed more deeply in section 7 5 3 RESULT MARKERS All values The result tables arrange the values according to the current result type gt displacement type results first or second order deformations static eigenshapes finite element node number displacement components www stablab net a BLAB force type results internal forces finite element node number finite element number force components gt reaction type results reactions equilibrium finite element node number reaction components 7 5 3 RESULT MARKERS On the graphical interpretation of the results markers can be placed in order to show certain significant values When moving the mouse along the structural elements or m
35. d local eccentricity type are the same as for the point support The select function x The line support will be placed to the selected edge of a surface an edge of boundary or an edge of a hole or to an axis of a beam www stablab net a BLAB The draw function K The line support will be placed between the first and the second point defined by the draw function on an axis of a beam 5 5 LINK ELEMENTS TTF Link element can be used to connect elements which are not directly connected to each other HE Parameters Position of connection g Rotation rekso s E ky P t the start paint There are two different types of link element Connect two structural points Gl For example if there is a cantilever on a relatively high tapered column see image below it is advisable to connect it not directly to the reference line of the column but with the link element If it is connected the way like that the analysis and design results are more accurate and the modeling is more exact The position of connection parameter is a value between O and 1 and defines the place where the continuity acts in the percentage of the length of the link element The rotation value defines the angle of the link element in degrees www stablab net Connect two structural edges that are equal length and parallel This type of link element can be used to connect two equal length and parallel beams www
36. d then the black arrow ch is clicked then previously selected members can be removed from the selection or new members can be added 6 4 5 TEMPERATURE LOAD Temperature loads can be defined to members Geometry structural members Loads Analysis Oo aa eS a 8 Temperature load on bar First choose the type of the temperature load the temperature is changing along the cross section s height or the width Then add the construction temperature reference temperature and the upper and lower temperature of the cross section The last step is to select the member where you would like to apply the load www stablab net Type of temperature load Type of temperature load Varying along the height of the section 7 Varying along the height of the section Varying along the width of the section Varying along the width of the section Construction temperature Tref 20 Construction temperature Tref 20 Temperature of upper fibre T1 20 Temperature of left fibre T1 20 Temperature of lower fibre T2 20 Temperature of right fibre T2 20 amp i peipibiaaladaacaiaaics iA 6 4 6 PRESCRIBED DISPLACEMENT Prescribed displacement can be applied for point supports Geometry Structural members tan i Cle Parameters with components Displacement X Y Z 0 Rotation X Y Z a i icici 6 4 7 PRESTRES PRESTRAIN The change of the original member system length
37. dent from the actual UCS Effect of the options Copy structural members Unchecked Use when only the loads and or the supports of the structural member need to be coped or moved Checked Default Structural members will be copied or moved Copy loads Unchecked The loads will not be copied with the selected structural members Checked The loads will be copied with the selected structural members Copy supports Unchecked The supports of the selected structural members will not be copied Checked The supports of the selected structural members will be copied In case of the selection set does not contain at least one selected member than the selected supports will not be copied Join point If the Join points box is checked then the end points of the copied objects will be connected with lines dik mirroring axis will be projected into the actual UCS system and Mirror selected objects The two given points represent the mirroring will be performed in the actual UCS symmetrically to the axis of mirroring As first step select the UCS for mirroring if it is needed select objects to be mirrored and click on the MIRROR SELECTED OBJECTS icon www stablab net Copy structural members Copy supports Join points Selecting the mirror line by picking two points for the mirror axis the selected objects will be moved or copy to the mirrored position The effects of the options are the same as it
38. different types of eccentricity Example I positioning After changing the eccentricity of the beams y 100 mm the new positions of the supports are as follows www stablab net STABLAES i i 0 Reference line T i y mm 150 z mm 145 y mm 150 In case of the 0 Reference line eccentricity type the Support kept its position relative to the reference line In case of the 5 Middle Middle eccentricity the support moved with the point of the section Example 2 Positioning a support by selecting the global coordinate System the eccentricity is 145mm from z direction of the local system of the supported column Parameters Support Local eccentricity we y mm 0 z mm 145 i Select the point for support www stablab net Changing the eccentricity of the column to y 300 The column eccentricity from the centerline is 300 mm in Y direction Position of the support was not changed The support kept its original relative position to the centerline of the column Rotating the column with 30 degree The support was rotated accordingly but it kept the directions of its local axis parallel to the axis of the global www stablab net 8 O S TABLAB coordinate system which was selected by for positioning the support By selecting any of the 9 other type of eccentricity i aiailadnacad Changing the eccentricity of the column to y
39. e circle Select the radius of the circle The circle will be created in the plane containing the centre point and parallel to the actual UCS S Draw circle by diameter Select the start point Select the end point The circle can be created out of the actual UCS system www stablab net a BLAB Ol Draw circle by 3 points Select first point Select second point Select third point The circle will be created in the plane defined by the three definition points Draw Arc Arcs could be created out of the actual UCS e Draw arc by center point start point and angle Select the center of the arc Select the start point of the arc Select the angel of the arc or type it to the dialog window a Draw arc by 3 points Select the start point Select the end point Select a point in the arc a Draw arc by start point end point and tangent Select the start point Select the end point Select the other point of the tangent Draw two dimensional plane elements Draw two dimensional plane element Define the geometry of the plane element a Draw hole Select the plane element Define the geometry of the hole Rectangle closed polyline or circle Change the direction of the local x axes of a plane element by defining two points Select the surface Select the start point Set the direction with the second point The construction modes of the plane elements H The construction mode of a rectangle type plane el
40. e content of the Basic line field means the height of the 0 level in the global Z direction All the picked points will be measured from to this value as a Q aZvaer QO Rm Parameters od ee iii the place of height dimension www stablab net a BLAB gt Textbox to a given line Jal The given text Grid 4 in the script field can be placed into the model a2 SF e m Parameters Auto Grid4 3 7 MEASURE During modeling sometime necessary to measure distances and angles The MEASURE tool can be found at the end of the GEOMETRY tab Geometry Structural members Loads Analysis The following window offers the measuring functions www stablab net Unit of length Unit of two dimensional figure degree angle Tp Set the start point gt Measure distance az Shows on the screen the measured distance between two picked points in meter or in millimeter selected from the unit of length list box gt Measure angle l Function measure the angle between two lines was defined by clicking three snap points in the 3D space in the plane of the two lines in degree or radian in gt Data of structural member D Function shows on the screen the length the surface and the weight of the selected structural member www stablab net a BLAB 4 DRAWING GEOMETRY 4 1 BASICS The first step of the modeling phase is the geometry drawing of the structure In StabLab all t
41. e section The great variety of calculation possibilities includes first and complete second order not only P 6 effect analysis flexural torsional and lateral torsional buckling solutions and static eigenvalue analysis The exceptionally fast and robust equation solvers yield optimal calculation time even for unusually huge models The functionalities connected with the structural analysis are placed on the ANALYSIS tab In the first step of the analysis the finite element mesh generation is automatically performed 7 2 FINITE ELEMENTS 7 2 1 BASICS The mechanical performance of the calculated model is always highly influenced and limited by the applied finite element type The considered displacements forces shape functions second order effects within the finite element model basically determine the quality of the analysis the expectable results and accordingly the applicable standard verification methods On the other hand the engineer should be aware of the important characteristics of the used finite elements already at the model building phase in order to avoid the non expected structural behavior and calculate the mechanical performance of the imagined structure as accurate as possible In StabLab all the finite elements model always have the real 3D behavior there are no options for special reduced www stablab net a BLAB degree of freedom calculations plane frames etc if it 1s required appropriate suppor
42. ebaseecssasaaeases 110 7 4 3 Statical eigenvalue buckling analysis 111 Tato DWE IIMs SeMsSItIVItY sorrrrrr dran ENNIE EEEE ee pata ee neta 112 Ts MAY SUS TOCUILU Ga eri eee see reek ast aerate aden Gartner naman asesieeans 113 7 5 1 Result types ell ae 113 7 5 2 Visualization options oA E 114 7 5 3 Result markers EE 116 7 5 4 Show original shape of structure 00 cee 117 8 Documentation csc cen eee nn 119 8 1 The document tab 119 8 1 1 Creating snapshots 2 119 8 1 2 Snapshot managetr 7 120 8 1 3 Model informati a 7 121 www stablab net 4 a BLAB 1 GENERAL DESCRIPTION 1 1 INSTALLING THE SOFTWARE In the followings we give those hardware and software requirements the StabLab software cannot be run without or their lack may result in a slow operation System requirements gt Processor Intel Core 15 CPU 2 GHz or equivalent AMD or better gt Operating system 32 bit Microsoft Windows XP 32 bit and 64 bit Windows Vista 32 bit and 64 bit Windows 7 32 bit and 64 bit Windows 8 gt Memory 2GB RAM minimum 4GB or greater recommended gt HDD 100MB of available hard disk space for installation gt Video card 256MB of video memory or greater gt Constant Internet connection You will need to have administrative or power user rights for the
43. ected dimension of the distance between two selected points The length of the distance between two selected points will be projected onto the global X or Y or Z axis www stablab net Parameters gt Auto moving the mouse the reference axis gt According to global distance between two gt According to global distance between two gt According to global distance between two axis X selected axis Y selected axis Zi selected system is detects the desired the X axis projection of the points the Y axis projection of the points the Z axis projection of the points gt Lengthwise dimension between two points an The distance between the selected two points could be placed in one of the following plane gt Plane defined by centerline of the object and the X Y plane global coordinate system gt The plane perpendicular to the above plane and containing the centerline of the object www stablab net a BLAB Parameters gt Auto moving the mouse the system is detects the desired reference axis gt Diameter of a circle gt Radius of a circle gt Height dimension gt Angle of two lines After selecting two lines any of the four angle could be dimensioned im This dimensioning the high positions of the selected points of a function helps for quick construction relative to global Z direction related to the given value in Basic line filed Th
44. ement can be selected rectangle or leaning rectangle O The construction mode of a circular type of the plane element can be selected draw circle by radius by diameter or circle by 3 points www stablab net a BLAB Draw polygon a closed polyline Set the first point Set the next points To close the polygon press right click on the mouse 4 5 MODIFYING The four mostly used modifying functions are placed on the left sidebar Move point and edge Select the point and or edge to be moved Set the new position of the point edge This function is used for change the position of any of the end point of a linear or circular element or to change the position of an edge or a corner point of a polygon or of hole in a polygon AD Move selected objects The selected objects can be moved or copied Select the objects and click the MOVE SELECTED OBJECTS icon Copy structural members Copy loads Copy supports Join points Select the transformation Move or Copy The copy function can be activated by radio button near the Copy function The number of copies can be selected Set start point of the vector for moving copying Set the end point of vector for moving copying The selected members loads and supports will be moved or copied to the position which is defined by the given vector accordingly www stablab net a BLAB to the selected options The Move Copy function is indepen
45. en Drawing the window from left to right then only those members are selected that are within the window with their full size inclusion window selection Drawing the windows from right to left then every member is selected no matter with how small part is found in the rectangle section and inclusion window selection selection by property this option can be reached on the left side bar or by right mouse button click on the graphical window The selection can be made by choosing the desired object and further narrowing is possible by sorting the appropriate parameters out EE Select all Delete selection Invert selection Select by property Sizes of objects 4 l JEE i Jj select by property gt object tree selection selecting objects by clicking on the elements of the Object Tree www stablab net Model Content Portions Manager be R1756 a i R1757 R R1761 R1763 R1765 R1766 e R1767 R1768 R1769 R1770 b R1771 i R1772 l RITT3 a fe R1774 b R1775 R1776 R1778 R1779 b R1781 p R1782 X By clicking the object names in the object tree while holding down the CTRL or SHIFT key results multiple objects selection To reselect any of the selected object hold down the CTRL key and click on the object name again in the object tree The additional generalized selection options select all unselect all inverse selection can be
46. en the elements prescribed displacements temperature loads etc 4 Solution of the basic linear system of equations which writes the relationship between the applied nodal forces known variables generated from the loads and the nodal displacements unknown variables U in the global coordinate system for the global model see section 7 2 FINITE ELEMENTS for the interpretation of nodal displacements and forces KU P U K P 1 5 Calculation of the internal forces and stresses of the elements f in their local coordinate system by transforming the global nodal displacements of the element into local system u using their local stiffness matrices fe K Iy 2 7 4 2 SECOND ORDER The second order calculations take into account that the loaded and deformed structure can behave differently than the initial configuration This effect can be considered as if the initial stiffness was changing during the loading history The steps of the second order analysis are the following gt Performing the whole first order analysis as described in the previous section gt Calculation of geometric stiffness matrices K of the finite elements in their local coordinate system by the internal forces of the elements f www stablab net a BLAB gt Compiling the second order global stiffness matrix K Kg and nodal force vector P of the whole model by transforming the element stiffness ma
47. fter login there is a startup dialog window which allows creating and opening models easily The latest models can be opened without browsing folders They are sorted by the last modification date as a default setting but it can also be sorted by name or by model path www stablab net Last modified Path Description 2013 04 05 13 28 12 C SL_test csm StabLab test model The first big icon 1 is for creating a new model the second 2 is for open model from folder 1 3 2 THE GRAPHICAL WINDOW The structural model appears always in the graphical window There are no other window opening options however there are lots of viewing possibilities in this single window The graphical window helps the modeling by the global coordinate system GCS and a moveable rotatable and size adjustable grid which is the main area for drawing The coordinate system at the left bottom corner denotes always the unchangeable GCS the origin of the user coordinate system UCS takes place at the middle point of the grid which is always the plane XY of the UCS The following moving possibilities and quick view settings should be used during the structural model manipulation gt Move push and hold down the middle mouse button or use the four arrow buttons on the keyboard to move the model on the screen gt Rotate hold down the ALT key and the left mouse button The center of rotation is always adapting the actual model view www stablab net
48. gent R Select an existing line for the section as a reference line of a member jmi Read out the parameter of an existing member by clicking on it and assigning those parameters to the one to be created Member parameters dialog Release start end Element group Number of finite elements Local eccentricity y mm 0 zim 0 Foiytonos Fotonas f Initial bow imp 0 Ly 0 L z Bement ie i A the start point gt Section before creating defined y mm in the middle part of the Release start end Initial bow imp Element type Element group 0 3000 cs szeiv ny Folytonos vs Folytonos w 0 Ly 0 L z Beam column with warping Y Number of finite elements Local eccentricity z mm 0 degree 0 a beam or Ss column member cross sections should be loaded and the appropriate section can be selected from the combo including the loaded sections If no section has been loaded in advance the SECTION dialogue can be called by pressing the button next to the combo www stablab net Parameters Material Type Source State _h 190 bf 200 tw 6 5 tf 235 EN Steel standard Standard Not used h 290 bf 300 tw 8 5 tf 235 EN Steel standard Standard Used _h 220 bf 110 tw 5 9 tf 235 EN Steel standard Standard Not used _h 240 bf 120 tw 6 2 tf 235 EN Steel standard S
49. gt clicking on the heading cells the whole column below will be selected gt if the there is a checking option in the table the multiple checking is possible for the selected cells clicking on the right mouse button Set analysis para ter X Basic settings _ Load combinations Name First order Second order Number of buckling eigenshapes Sensitivity calculation ULS Load combination 1 E ULS Load combination 2 ULS Load combination 3 ULS Load combination 4 ULS Load combination 5 ULS Load combination 6 ULS Load combination 7 ULS Load combination 8 ULS Load combination 9 ULS Load combination 10 TST ST SST et FIAT me i gt if the there is value entry option in the table cells multiple value entry is possible for the selected cells clicking on the right mouse button and defining the common value www stablab net aa ULS Load combination 2 ULS Load combination 3 ULS Load combination 4 ULS Load combination 5 ULS Load combination 6 ULS Load combination 7 ULS Load combination 8 ULS Load combination 9 ULS Load combination 10 IIVIIIIG QA AAA AKAA A I a ga 1 6 HOT KEYS The hot keys can significantly speed up the modeling work In StabLab the following hot keys can be used gt CTRL N new model CTRL 0 open model CTRL S save model CTRL Z undo last action CTRL Y redo CTRL A
50. he adjusted value the program sends an error message and shows with red sign the relevant members in the diagnostics window and not perform the analysis gt Warning In case of the distance between the endpoints of two members is more than the defined error level distance but less than the adjusted value here the program sends a warning message and shows with yellow sign the relevant members in the diagnostics window 1 3 4 THE TABS File Edit View Options Help Geometry Structural members Loads Analysis JOOCMIRD p A HASSA A The tabs contain the systematically collected functions of modeling and analysis leading the engineers through the logical steps of the structural analysis By approaching any of the icons with the cursor the short name of the icon will be appeared GEOMETRY TAB Geometry Structural members Loads Analysis 000R PP haw 1 ew NN AA Contains all the important CAD drawing modification functions dimensioning and measuring tools STRUCTURAL MEMBERS TAB Geometry Structural members Loads Analysis L UF t ee es 4247 R www stablab net a BLAB The functions related to cross sections structural columns beams supports and link elements are collected on this tab LOADS TAB Geometry Structural members Loads Analysis BA t boadoase st tT ed e a All types of loading including load cases load groups load combinations and unique loads placed on the structure
51. he geometrical objects can be easily created and modified in a 3D space Among the basic CAD drawing modifying and moving functionality advanced snap options make the modeling efficient All the CAD functionality is placed on the GEOMETRY tab the further view select and snap options are on the side and status bar Additionally all the relevant modeling functions are placed on the dialogues of structural members supports and loads 4 2 COORDINATE SYSTEMS For the appropriate modeling and interpretation of the analysis results it is of high importance to be aware of the applied coordinate systems This section summarizes in detail all the coordinate systems used in the StabLab z Two different type of coordinate systems can be used the rectangular Descartes system XYZ and the polar system a L In the polar system a denotes the angle between the axis X and the vertical plane defined by the axis Z and the point B denotes the angle between the section line of that plane and the coordinate plane XY and the line from the origin to the point and L denotes the distance from the origin The polar coordinate system is less frequently used so the rest of this section describes the Descartes system www stablab net a BLAB As a general convention all the Descartes coordinate systems axes directions and rotation signs follow the most commonly applied right Af hand rule This rule is
52. he right objects are on the right place 3 2 MODEL VIEWS The model viewing options can be found on the left side bar Beyond the usual model views top view front view side view axonometric view perpendicular to raster view there are fore visualizing options for the objects used A represented by a single line the surfaces by a two dimensional gt line view the simplest model view the bars are figure without thickness the supports are line types www stablab net as BLAB Recommended to use in the model building phases clear visualization of the member since the snap placement of supports and loads easier points making the gt wireframe view Le on the wireframe view the lines of the cross sections and plate thickness appear the supports are line types gt hidden line view La the cross section and plate thickness appear in a solid form without shading and sparkling effects the supports are solid types www stablab net gt solid view the cross section and plate thickness appear in a solid form with shading and sparkling effects the supports are solid types en ee When the full model tends to be more complicated and parts of the model are in focus then the SUBMODEL VIEW should be applied www stablab net E Show hidden parts of the structure translucently This option shows only the selected parts of the model
53. in 6 4 3 SURFACE LOAD There are two visibility options view the surface load or view the distributed load Changing the views is possible by clicking on the dedicated icon which can be found among the visibility of graphics symbols setting There are two possible methods to convert surface load to the selected members 1 Converting surface loads to uniform line loads is performed by a meeting the following requirements gt the resultant force of all the line loads is the same as for the surface load gt he line loads are constant on all the selected members www stablab net Method of surface load distrib Hon Distribute surface load based on structural points Endpoints of loaded bars common points of continuous CI bars too Intersection points of loaded bars a Intersection points of loaded and unloaded bars laying in the surface P Intersection points of loaded and unloaded bars not laying in the surface 2 Converting the surface load to line loads based on structural points has the following background 1 the surface load is first converted to concentrated point loads acting on the selected structural points using the Delaunay triangulation technique 2 the concentrated loads are then converted to line loads on the selected members meeting with the following requirements gt the resultant force of all the line loads is the same as for the surface load gt the line loads are linear on al
54. ion 4 2 COORDINATE SYSTEMS What needs more explanation is the 7th DOF which is mathematically the first derivative of the twist about the longitudinal axis mechanically it represents the warping of the section which is straight consequence of torsion on thin walled members The next figure illustrates the warping effect of I shaped cross section when the flanges step out of the original plane of the section www stablab net a BLAB In this case the warping DOF can be considered as a dual and Opposite rotation of the flanges about the axis perpendicular to their width in this case the local axis z Since steel members are usually relatively slender various modes of global stability failure can occur flexural buckling torsional buckling lateral torsional buckling and any interactions of these all modes can be calculated by the 7DOF element It is a quite important and advantageous feature in the stability design of these members but since the accurate calculation of all the torsional modes is highly dependent on the haa warping DOF it is essential to consider this effect already in the modeling phase see chapter 5 STRUCTURAL MODELING for the modeling warnings The TO elements have only 1 DOF which is the longitudinal displacement U These elements are considered in the calculation only if they are subjected to tension accordingly the calculations are iterative in nature At first an analysis is performed co
55. l pre calculation check The following basic checks are performed gt existence of load on the structure existence of support on the structure length of bars line loads and line supports overlap length and compatibility of haunches VV VV multiple supports on the same place M compatibility of tension bars The following pre calculation checks are performed gt overhang of line loads and line supports point loads and point supports are not on the model overlap of bar members VV Y very small distance lt 5 mm between points or lines of bars loads or supports the limit distance can be set in the OPTIONS menu The object which the errors or warnings are detected on can be selected and deleted from the diagnostics results table in the middle of the right tables 7 4 ANALYSIS TYPES The required analysis types can be set on the ANALYSIS PARAMETERS panel All types can be run for all the finite elements Basically the analysis types can be defined for the existing load combinations www stablab net Basic settings Load combinations Global settings Global imperfection No Statical calculations Ultimate limit states First order analysis Second order analysis Buckling analysis Model porton Upper limit of relevant buckling eigen values 10 0 By using the first tab it is possible to set analysis parameters for all load combinations at the same time Global settings and analysis types are
56. l the selected members gt the end value of the line loads on the selected structural points for all the selected members are equal Distribute surface load to uniform line loads Distribute surface load based on structural points nb oo ndgso A RNANA REMAP cede Hog NARRAN CHU NNTO conRoNIcE SINCE HI oAICIonnndnonncononoqoe cece docecqoadcnerononsoSSondqoononoceccacasroacqeac A jy Endpoints of loaded bars common points of continuous E Intersection points of loaded bars a aa pan points of loaded and unloaded bars laying in Gs B points of loaded and unloaded bars not laying in the surface www stablab net a BLAB The basic working method is the following First create the load transfer surface Select the members which it distributes load to or accept the default setting which is distribute loads to all planar members Apply surface loads to the surface at every load case where it is necessary 6 4 4 1 Modifying load transfer surface Load transfer surface can be modified by selecting it and changing the properties in the property bar Member selection can be easily modified from the planar members to selected members It is possible to highlight the previously selected members by clicking on the blue thick Load transfer surface 1 Name of load transfer si Load transfer surface Two dimensional figure main model id 2524 Selected membe he Visible If selected members option is chosen an
57. lect one of the typical point of the section geometry 1 9 from the list the second way is select one of the typical point 1 9 of the section relative position of the support by clicking the position on the graphical imitation of a section click the small icon left to the list box Local eccentricity Giving value for the y or z parameters for local eccentricity these values will be added to the above selected position www stablab net as BLAB Changing the eccentricity of the supported object the new position of the support will be calculated accordingly Depending on the type of the selected local eccentricity used by placing the support the transformation rules are the following By selecting the 0 Reference line eccentricity type Placing a support with this eccentricity type changing the eccentricity of the supported object the support will keep its position relative to the reference line not to the section By changing the Rotation angle attribute of the supported object the reference line also rotates and the position of the support will rotate too By selecting the 1 9 eccentricity type Placing a support with any of these eccentricity types changing the eccentricity of the supported object the support will keep its position relative to the section By changing the Rotation angle attribute of the supported object the position of the support will rotate too Example for the
58. lements manually on the DIMENSIONING dialogue using the last tool 3 6 DIMENSIONS For the documentation of the calculated structural model it is very important to be aware of the exact dimensions of the model The dimensioning tool can be found on the GEOMETRY tab Geometry Structural members Loads Analysis JYOOCBMIRD p 4 KAN Nl A la Place dimension This provides a great number of different dimensioning options www stablab net a BLAB gt Projected dimension of a linear object length of the selected linear object onto the global X or Y or Z ll The projected axis will be dimensioned Parameters gt Auto moving the mouse the system detects the desired reference axis gt According to global axis X the X axis projection of the length of the linear object gt According to global axis Y the Y axis projection of the length of the linear object gt According to global axis Z the Z axis projection of the length of the linear object www stablab net a BLAB a gt Lengthwise dimension of a linear object L The length of the selected linear object could be placed in one of the plane which is defined by centerline of the object and the global coordinate system X Y plane and a plane perpendicular to this plane and containing the centerline of the object Parameters gt Auto moving the mouse the system is detects the desired plane gt Proj
59. n the number of division can be specified This snapping points show the endpoint of the subdivided length There is no rest distance at the end of the element gt OFF The field of division will disappear from the bottom status bar Snapping the intersection points of graphical lines circles arcs and structural beams columns objects Snapping the parallel point to a linear object Snapping the nearest element point to an object Snapping the lengthened point of a linear object The system is showing the actual distance of the snapping point in mm from the endpoint of a linear element Switches On OFF the snap point of the raster Snapping point to a tangent of an Arc Circle from one point Snapping point to a perpendicular from one point to an object Line or Arc Circle Snapping to Center point of Arc Circle For snapping the center of linear elements you have to use the appropriate settings of snap divided points see above www stablab net a BLAB The last field of the Status bar is the STEP field Here the given number in mm is the snapping distance towards the length direction of line and bar elements when the lengthening snapping point is ON xp Y foo zp L foo Bpxae n amp Sep 1000 1 3 7 THE WINDOWS OF OBJECT TREE DIAGNOSTICS RESULTS AND OBJECT PROPERTIES The visibility of these windows can be switched ON OFF in the VIEW menu Object tree window Object window
60. nation 1 ig eigenshapes 3 mm value e 20 00 6 5 3 1 Selection of eigenshape s Eigenshape s can be selected for global imperfection from Buckling results on the ANALYSIS tab To select a buckling shape press right click anywhere on the graphical window and click on the Apply eigenshape as imperfection function of the dropdown menu www stablab net Marker Remove marker Apply eigenshape as imperfection Every selected eigenshapes are arranged to an imperfection group Groups can contain one or more eigenshapes New group can be created with the NEWGROUP button Apply eigenshape as imperfection Value of the amplitude must be given It can be given in two ways e Maximum value of amplitude can be given in millimeter Other values are interpolated e With the multiplication factor of the calculated normalized eigenshape values these values can be seen on the graphical window or in the result tables www stablab net a BLAB 7 STRUCTURAL ANALYSIS 7 1 BASICS The analysis of the structural model can be the most black box type phase of the design process for the engineer and additionally the modern structural standards usually define the appropriate and required analysis type for the used design formulas The StabLab applies the finite element method for all the calculations using two beam column element types traditional 12 DOF Timoshenko and 14 DOF thin walled including warping of th
61. nite element model is automatically modified according to the applied initial sway imperfection Direction of the initial sway can be set according to the horizontal global coordinate axis or with a unique angle from global axis X Initial sway can be applied from the lowest point of the model or from a given height Extent of the initial sway 1 must be between 200 and 500 is in radian Notional load Initial sway Application of eigenshape Name Initial sway 1 v New Delete Direction of the initial sway x x Y y Unique angle from axis X o degree Give the height of base level Lowest point of the model Give unique height o mm Extent of the initial sway Extent of the initial sway 1 Fi 200 200 lt 1 Fi lt 500 www stablab net a BLAB 6 5 3 APLICATION OF EIGENSHAPE Selected eigenshape s can be applied as a global imperfection The finite element model is automatically modified according to the applied eigenshape s On the GLOBAL IMPERFECTIONS dialog the selected eigenshape s can be turn on off with the checkbox s and the value of amplitude can be also modified Notional load Initial sway Application of eigenshape Global imperfection 1 T Load combination Buckling eigens Type of ampli Value of a jv Load combination 1 ig eigenshapes 1 mm value B 10 00 v Load combination 1 ig eigenshapes 2 mm value zl 10 00 v Load combi
62. nsidering all the TO elements modeled by one finite element Next a force check is executed on the TO elements and the compressed ones are neglected from the model and a new calculation is initiated It is continued until all the TO elements has tension This model configuration is taken into account in the eigenvalue calculations SINCE THE EIGENVALUE CALCULATIONS CAN NOT BE PERFORMED ITERATIVELY IT MAY HAPPEN THAT IN THE EIGENSHAPE THE TO ELEMENT GETS COMPRESSION I E ITS LENGTH SHORTENS IN THIS CASE IF THIS EFFECT IS SIGNIFICANT AND SHOULD BE AVOIDED A NEW EIGENVALUE ANALYSIS SHOULD BE RUN WITHOUT THE TO ELEMENT 7 3 MODEL CHECK DIAGNOSTICS In StabLab there is a possibility to perform a model check previous to executing any calculations This function automatically runs before starting the finite element mesh generation or analysis but can be initiated any time switching the Diagnostics on the VIEW menu and run examining the recent state of the model There are two kinds of diagnostics messages www stablab net a BLAB gt ERROR errors make the calculations impossible or a a to execute so the detected errors stop further calculations gt WARNING the warnings allow the calculations but notice the possible errors Part of the model checks is performed on the user model basic check these are basic requirements for the normal performance of a model the other part is performed on the generated finite element mode
63. o do so please select the appropriate load case at the bottom right corner of the dialogue 6 3 LOAD COMBINATIONS Load combinations can be set from load cases Load combinations can be created manually by giving the safety and combination factors manually for each load cases To do click on the CREATE NEW LOAD COMBINATION button teil It is possible to edit multiple safety factors at a time select safety factors and right click over it www stablab net Limit state a DL Load combination 1 ULS Ultimate 1 35 Load combination 2 ULS Ultimate 711 35 Load combination 3 ULS Ultinat one _ 0 8 1 35 DL 0 9 LL 1 5 Wind 0 8 Snow The selected load combination multiple LC s can be selected with i using CTRL or SHIFT buttons can be copied Gah deleted El and al renumbering ce 6 4 LOAD TYPES Any placed load will belong to the load case selected from the list 6 4 1 POINT LOAD Point loads can be placed according to the global local or the user defined coordinate system www stablab net a BLAB Geometry Structural members Loads Analysis eo Parameters Load X 7 0 Moment X Y Z 0 kNm Local eccentricity re y mm 0 z mm o i the action point of load Eccentricity can be applied on the point load also The effect of the selected coordinate system the applied local eccentricity type and values are the same as poin
64. oads 000000 0 1 86 6 1 Basics 00000 ees ss ee 86 6 2 Load cCaseS 00g nee ee et 86 6 3 Load combinations A 87 6 4 Load typesS anaasannan nananana n an n 88 6 4 1 Point load 5 05 22st 88 6 4 2 Line load eama esses ee 90 6 4 3 Surface load qac EER 93 6 4 4 Load transfer swt iaee 93 6 4 5 Temperature lodd T T 97 6 4 6 Prescribed displac ennout 98 6 4 7 Prestres prestrain ccee eee e e n mms 98 www stablab net 3 a BLAB 63 Global ImPCITCCUIONS icc cueccaceeeucseserekesensatneereanenesaeaetn es 99 Coel INGTIONGL POAC s cec5cssedeeaaeseeecasae eres oeueeraaseeasacaee suas 100 Dera TAU BW ae hae nee heat ade eh eee a 101 6 5 3 Aplication of eigenshapPe ccc ccc cece eens 102 7 SORMCTULAL GW AV CUS eene neta ei ceeeeene heen eee eine ee EEE 104 Fal DAS UCS jeapeeceoussee se oanreage ee gseegs aoe E ue ae easeeaneenee oe ereageews 104 dad PIME ClOMCUC GS cute aucs e EEE ooseeedeesae nace omsoaeceesacans 104 ye eh Cae ee ee ee ee ee ee eee 104 T22 GIDE CIOMAS cesnend ey eahaaeevonnsdeevos RIERREN E EPEA NEEESE 105 7 3 Model check diagnostics ccc ccc cee cence nees 107 Tek Analysis UY DC Gnas ose ceheeahepauond Ar EAr opedeceheeakesuseuenens anda 108 Teak Itt OLOCE oben cree tenccare kan oui buenos boue same rane iuee tame sade 109 Tea DECOUG OLGCE coger ac ca uewne qe ee nea essere cena
65. on steps for the following operation systems gt Windows XP Professional Windows Server 2003 Windows Server 2003 Enterprise Edition Windows Server 2003 Datacenter Edition Windows 2000 Advanced Server Windows 2000 Datacenter Server gt Windows NT Server 4 0 Enterprise Edition VV VV Y backup the original boot ini file and then put the 3GB switch in your boot ini here is the sample boot ini file with 3GB switch boot loader timeout 30 default multi 0 disk O rdisk O0 partition 2 WINNT operating systems multi O disk O rdisk O0 partition 2 WINNT 2 3GB The in the above line represents the name of the operating system you have to add the 3GB text at the end of that line 1 2 LOGIN PROCESS After starting StabLab login dialog will be appeared To login the username or email and password have to be entered which were www stablab net 6 a BLAB given during the registration process on the www stablab net website a __ a BLAB StabLabUser Remember my credentials www stablab net _ o After successful login the process the StabLab License dialog will appear The three big buttons show the available StabLab licenses Click on one of the available buttons and the selected license will be started If Show all licenses button is clicked all the available licenses will be appeared in a table The first and the second column of the table show the version of
66. or the User coordinate system the orientations of the constrains represented by the support will be different Global coordinate Global coordinate User coordinate system System system www stablab net a BLAB If any special supports are needed during the modeling process different from the predefined support types then click on the Support definition icon PT Here you can define new supports 7 DOFs can be set to free fix or semi rigid For semi rigid DOF the stiffness must also be set in kN mm or kNmm rad The support type names can be clearly understood For instance x y Z XX means any movement is fixed in x y and z direction and the rotation around x axe is also fixed All the rest DOFs Degrees of Freedom are free Local eccentricity can also be defined to the supports This feature can be used for example for modeling the support effect of the bracing which is not connected to the reference line of the member but supporting the flange of the beam f Point support Reference line www stablab net S TABLAB The eccentricity of the support can be defined relative to the reference line of a section or relative to the section geometry The 0 Reference line local eccentricity type can be selected only from this list box You can specify the support eccentricity relative to the section geometry in two ways The first way is se
67. ore correctly the finite elements the result markers continuously appear showing the actual values These markers can be fixed by clicking on the right mouse button and choosing the Marker option The fixed markers will appear on every result views where it has interpretable value gt Deformation gt Normal force www sStablab net a BLAB gt Bending moment When there are fixed markers on the model the User defined values table contains the appropriate view dependent values of the marked points In this table the markers can be switched to disabled by uncheck the proper row TT TT EEE EEE TT 1 j r 5 37 60 130 0 000 4 900 0 000 56 820 0 000 0 000 J 71 400 0 000 52 980 75 880 0 000 78 680 The markers can be deleted by gt click on the proper row in the table by the right mouse button gt click on the marked point on the graphics by the right mouse button and chose Remove marker option Extreme values can automatically marked by the check boxes on the Extreme values table rows 7 5 4 SHOW ORIGINAL SHAPE OF STRUCTURE SHOW ORIGINAL SHAPE OF STRUCTURE function will show the original shape of structure and the deformed structure at the same time www stablab net a BLAB Geometry Structural members Loads Analysis p gt js First order Load combination 1 v Deformation XYZ CUV EQAUBRDEF SE UDN www stablab net
68. orts Visibility of the name of pins end releases Visibility of the name of link elements Visibility of the name of the load transfer surfaces the name of the object also will not be visible www stablab net a BLAB Visibility options of labels ae Show material grades I Show shape names Show the load intensity f Show initial bow imperfection KN Show the units of quantities a Show labels of the local coordinate axes Action point sets The Action point sets offer a wide range of setting the point snapping functions lt Snapping the end points of graphical lines arcs and structural beams columns objects Switch divide function ON OFF gt ON In case of Divide snap mode is ON a new field will appear on the status bar There are 3 options for the divide www stablab net a BLAB snap point specification The user can select by clicking on the icon before the numeric field gt 5o clicking the icon the percentage will be calculated to a length of the approached element and from the approached end this length will be measured by the snapping points Usually there is a rest distance at the end of the element gt E 1000 clicking to the icon a distance can be specified This length will be measured by the snapping points from the approached end of the object Usually there 1s a rest distance at the end of the element gt EO clicking to the d ico
69. select all CTRL I inverse selection CTRL 1 switch to XY view CTRL 2 switch to XZ view CTRL 3 switch to YZ view Y V Y yY VV WV WV WV WV CTRL 4 switch to XYZ view www stablab net h D gt Yo yY Y Y Y Y Y Y V WV Yy Y Y Y Y Y VW WV WV WV Y WV Y CTRL 5 switches the view perpendicular to the raster ESC unselect all or terminate or abort the last action Delete delete selected objects F1 open Help system X manual definition of X coordinate value Y manual definition of Y coordinate value Z manual definition of Z coordinate value a manual definition of alpha polar coordinate value b manual definition of beta polar coordinate value L manual definition of length from the previous point in a defined direction R switch between the global and last defined user coordinate system Middle mouse button move model ALT left mouse button rotate model ALT right mouse button zooming model f move model up move model down move model right lt move model left middle mouse button scale model scale up model scale down model SHIFT left mouse button unselect SHIFT ALT left mouse button window scale www stablab net a BLAB 2 FILE HANDLING 2 1 BASICS The file handling in StabLab follows the same usual and simple way of the MS Windows standard The saved files contains all information about the model it can be relocated to other folder and opened Normally the
70. separated in three groups In the first group global imperfection can be set for the whole model see section 6 5 GLOBAL IMPERFECTIONS In the second group the types of the statical calculation can be set In the last group buckling analysis and parameters can be set If buckling analysis is clicked by default 10 eigenvalues are calculated The upper limit of relevant buckling eigen values can be given The buckling analysis can be performed for the whole model or for a model portion For each load combination unique settings can be set on the second tab Load combinations can be turned off or type of analysis can be set 7 4 1 FIRST ORDER The first order analysis calculates the structural response considering the initial stiffness of the model It is advisable to run a first order analysis in order to check the model performance www stablab net a BLAB before executing more costly calculations for instance eigenvalue analysis The steps of the first order analysis are the following 1 Calculation of first order initial stiffness matrices K of the finite elements in their local coordinate system 2 Compiling the global stiffness matrix K and nodal force vector P of the whole model by transforming the element stiffness matrices into the global coordinate system 3 Modifying the global stiffness matrix and nodal force vector considering the special boundary conditions supports continuity releases betwe
71. so can be given manually accordingly to the selected coordinate system Divide selected objects Lines and bars can be divided into equal or unequal parts By selecting the To equal parts option the number of the segments or the length of the segments can be set Divide lines and bars To equal parts 6 To unequal length parts Parameters Number of line segments 2 ca Length of line segment 1000 www sStablab net a BLAB By selecting the two unequal parts option a series of relative or absolute lengths can be defined measured from A or B endpoint of the object Divide lines and bars To equal parts Parameters From point A Relative distance values From point B Absolute distance values Values 1000 1000 1000 1000 ra Break two selected objects Select the two intersected objects to break Both object will be broken by the intersection point It works with linear and curved objects 7 Trim selected element by cutting edge Select cutting edge Select the part to be trimmed It works both with linear and curved objects E Extend selected line elements to limit line Selecting the limit line and click on the linear object to extended to the limit line o Divide by trim Cut out a part of the selected element Select object for cut out Select start point and the end point of the segment of the cut out ai Chamfer of two selected linear element Select the firs
72. stablab net a BLAB 6 STRUCTURAL LOADS 6 1 BASICS The definition of loading on a structural model is one of the most important modeling phases Contrary to the modeling of structural members the load modeling is minutely controlled and supported by the structural codes and standards since the appropriate definition of loads ensures the major part in the reliability of structural performance In StabLab several types of loading options help the engineer in this work In accordance with the modeling of structural member the engineer can work with the load types and the applied loads are automatically converted into finite element loads for the calculation model All the loading functionality connecting with the load modeling is placed on the LOADS tab 6 2 LOAD CASES Before place any loads in the model load cases must be defined As a default one load case has been defined in StabLab for quick calculations Create load cases and load groups In a Load group several load cases can be defined By clicking on the NEW button a new load group will appear www stablab net a BLAB By clicking on the NEW LOAD CASE button a new load case can be created Name and the color of the load case can be set Load case induding self weight With drag and drop gesture load cases can be moved between the load groups StabLab can add the structure s dead load to one of the load cases if necessary In order t
73. t and the second linear element The chamfer will be applied according to the order of selection www stablab net Parameters First chamfer distance mm Second chamfer distance mm Oe e the first straight line o Filleting of the edge of the section of two line element Select the first and the second linear element Chose a fillet radius 4 6 LAYERS P The layers dialog window can be used for www stablab net Create new layers Copy existing layer definition to a new layer Delete layers Edit properties of existing layers colour line style thickness and transparency gt Turn the visibility of layers on and off Freeze layers from activity whilst keeping them visible gt Turn on and off own style If Objects of own style checkbox is turned OFF then all the objects on the layer use the selected colour line style thickness etc If it is turned ON default setting then all the objects use the global style All CAD systems have a layer concept of some sort Objects are placed on appropriate layers as a practical way of managing the objects within the model www stablab net a BLAB 5 STRUCTURAL MODELING 5 1 BASICS In StabLab great emphasis was taken on the user friendly structural modeling in which the engineer can build the structural model using real structural elements Accordingly the user model built by the engineer using whole structural members beams with haun
74. t and or load system should be applied All the defined loads and supports are converted to nodal forces by load cases and nodal supports no forces or supports are considered along the finite elements this feature is taken into account during the automatic FE mesh generation The subsequent sections do not intend to introduce the deep theory behind the applied finite elements it can be found in the literature only the most significant features are presented and explained which are important to know for the appropriate interpretation of the results 7 2 2 LINE ELEMENTS There are three options for line elements gt a6 degrees of freedom 6DOF general beam column element for the bars subjected to axial force shear force bending moment torsion or any interaction of these gt a 7 degrees of freedom 7DOF beam column with warping element for the bars subjected same as 6O6DOF element warping effect gt a tension only TO element for bars subjected by tension force The 7DOF element is specially developed for thin walled members where the warping of the cross section is of high importance in the behavior this effect is considered by the 7th DOF In the following figure the considered nodal displacements are illustrated www stablab net a BLAB a 3 The first 6 DOF are the conventional displacements Ux Uy U and rotations My according to the local coordinate system of the member see sect
75. t number v Bar member R v Point support P 3 Ordering Direction 1 Direction 2 Drecton 3 P d members to be renumbered should be selected before the start of the dialogue The RENUMBER SELECTED OBJECTS window will appear with the automatically recognized object types contained by the set of selection With the checkboxes could be selected the different types objects for renumbering The following functions can be used for renumbering gt Prefix of the name can be defined gt Start number can be defined gt Priority of the renumbering can be set in the 3 main directions X Y Z www stablab net a BLAB The new names of the objects will built up from the given prefix and the new serial number Label s visibility The visibility of the labels can be set on the bottom status bar as it was discussed above 1 3 6 THE STATUS BAR The following label options are available gt material the used material name of structural members for instance S235 gt shape the name of the used cross sections of structural bar members for instance HEA 200 gt load intensity gt units the units of load and thickness if set for instance kN Or mm gt initial curvature the value of the initial curvature on Structural bar members gt coordinate system the names of the local coordinate axes X Y Z Additionally arbitrary text can be assigned to structural e
76. t support 5 4 1 POINT SUPPORT Parameters Load x Y Z Moment X Y Z Local eccentricity Type 2 Bottom Middle 3 Bottom Right the acl 4 Middle Left 5 Middle Middle 6 Middle Right www stablab net a BLAB 6 4 2 LINE LOAD Line loads can be placed along a member Parameters ai X Y Z 10 kN m q2 X Y Z o 10 KN m Postion ofa ene amp e oo m Position of q2 along the line x2 0 mm Local eccentricity _ ymm o z mm o i oat hear In order to place a line load click on the member using the Select function LB Line load can be applied to multiple members at the same time by using Place loads icon A This case the members must be selected before clicking on the LINE LOAD icon on LOADS tab E The 6th icon from the left is the GLOBAL PROJECTION SYSTEM which is commonly used when modeling the snow load If just a partial line load need to be applied along the member then there are two ways to apply www stablab net a BLAB The first way is to use the draw function by selecting the icon and set the start point and the end point of the line load This function can be used both for linear and curved members in accordance with the selected drawing function Parameters e qi X Y z q2 X Y z q A X4 Paton of qralong thee x o m Position of gz along the line x2 0 mm Local eccentricity Toe peee
77. tandard Not used h 270 bf 135 tw 6 6 tf 235 EN Steel standard Standard Not used h 300 bf 150 tw 7 1 tf 235 EN Steel standard Standard Not used _h 330 bf 160 tw 7 5 tf 235 EN Steel standard Standard Not used h 360 bf 170 tw 8 tf 12 235 EN Steel standard Standard Not used b h 120 t 5 r 10 235 EN Steel standard Standard Not used gt Release start end predefined releases can be assigned to the ends of the members If new release type is needed the RELEASE dialogue can be called by pressing the fee button next to the combo gt Initial bow imp half sine wave shaped initial bow imperfection can be defined in the two local direction perpendicular to the member reference axis y z with the given amplitude at the mid length gt Element type Section made from steel COIN With War ping Beam column with warpi Tension bar Two choices are possible Beam column with warping and Tension bar these types influence the finite element type used in the analysis The beam column with warping is a special element with 14 degree of freedom including the warping of the thin walled cross section It is an important effect in case of structures with usual steel profiles The tension bar can only resist tensional axial force no bending or torsional moments and shear if it got compression the analysis neglects its effect www stablab net a
78. the orientation in the labyrinth of tools and functions The usual parts of these dialogues are described below 1 Bw 5 the method of placement assign to an element or draw from one point to another s extract data from a previously placed object All the parameters are set to the same as for the selected object Di www stablab net a BLAB Gers J a coordinate systems in which the directions are considered a 4 ie additional drawing functions if the placement is by drawing is The main parameters of the object 5 are placed in the middle part of the dialog General Parameters qi X Y 2 qa X Y z Position of qialong the line x4 Position of q2 along the line c2 Local eccentricity Type yimm g z mm o The information field 6 gives always information about the next required step of the placement Every icon on these dialogues has a tooltip with the name of the function on it The text will appear when the mouse approaches the icon www stablab net S TABLAB 1 5 GENERAL FUNCTIONS FOR TABLES Basically there are two types of tables in StabLab the input tables and the output tables Since tables are usually used for working with large amount of data both table types have special features making the data managing more comfortable Input tables used in the LOAD COMBINATIONS and ANALYSIS PARAMETERS dialogues have the following common features
79. trices into the global coordinate system gt Modifying the second order global stiffness matrix and nodal force vector considering the special boundary conditions Supports continuity releases between the elements prescribed displacements temperature loads etc gt Solution of the basic linear system of equations which writes the relationship between the applied nodal forces known variables generated from the loads and the nodal displacements unknown variables U in the global coordinate system for the loaded and deformed global model see section 7 2 FINITE ELEMENTS for the interpretation of nodal displacements and forces kK K JU P U K K P 3 gt Calculation of the internal forces and stresses of the elements fel in their local coordinate system by transforming the global nodal displacements of the element into local system uel using their local stiffness matrices f K Iy 4 gt If the difference between the new nodal displacements and the ones obtained earlier exceeds a certain limit repeat the calculations from step 2 7 4 3 STATICAL EIGENVALUE BUCKLING ANALYSIS In a mechanical interpretation the eigenvalue analysis approximates the elastic critical load levels where the structure is subjected to some modes of loss of stability Mathematically it means that the second order equation of 3 has no unique solution because the second order stiffness matrix is singular In Sta
80. ually after pressing the appropriate letter X Y Z L for coordinate axis or length into a direction or a b L for polar coordinates The user could influence the interpretation of the manually entered values with the following settings Global e User A Absolute Al Relative K Descartes Polar By moving or clicking the slider with the right mouse button the size representation of the objects can be changed The wk adjustment Approaching any of these icons with the cursor a next four icons allow the sophisticated visibility group of graphic symbols will appear ordered into a matrix shape Clicking the first icon on each of these four visibility setting matrix the scope of the settings will be changed between global valid for all tabs or valid only for the current tab Setting this option on any of the 4 visibility matrix the selected scope will change on all the other three accordingly Changing this scope will also change the visibility between the previously adjusted global and the current tab visibility settings Visibility options of graphic symbols Zs www stablab net a BLAB ie Visibility of lines created with line circle and arc function of Geometry menu Visibility of the structural members created with beam or column function in Structural members menu Switching these members non visible their centerlines might still be visible accordingly to the
81. valid for the definition of geometry and loads as well The positive moments and rotations are defined as counter clockwise about the axis if it is viewed in front towards the origin in both the global and local system In the further text the following denotations are used gt X Y Z global coordinate system gt x y z local coordinate system 4 2 1 USER COORDINATE SYSTEM The User coordinate system UCS is used for making the modeling easier and faster The UCS is a specially positioned Descartes system XYZ The tools for creating and modifying the coordinate systems can be reached by the SET GRID AND COORDINATE SYSTEM button on the side bar Grid and coordinate system OfBlw tz tz lt m Xt YI zI a x mm mm Zz mm Grid X 1000 mm 1000 mm Size 20000 mm Step T i t origin of coordinate system The User coordinates system can be switched on or switch back to the global system at the bottom status bar Global User coordinate Scien www stablab net a BLAB The following creation options are available from left to right gt Switch to global system gt Set new origin for the UCS i gt The XY plane of the global system will be the XY plane of the UCS i gt The XZ plane of the global system will be the XY plane of the UCS bz gt The YZ plane of the global system will be the XY plane of the UCS bz gt Set the UCS by 3 points
82. ven height values along the local z axis of the tapered beam Below shown the effect of the different relative positioning by the chosen eccentricity www stablab net a BLAB 1 Place the centroid of the smaller section to the axis of the beam the center of smaller H value of the tapered member will be positioned to the axis of the original beam Z symmetric Z 2 Place the centroid of the bigger section to the axis of the beam the center of bigger H value of the tapered member will be positioned to the axis of the original beam z symmetric Z www stablab net a BLAB 3 Place the centroid of the original section to the axis of the beam The edge of the tapered member is coincident with the original member end the tapering starts from this position Z symmetric Z Activating the 1 icon by clicking an earlier created tapered member in the model the values the eccentricity and the relative positioning will be read out of that clicked and appear in the dialog box By clicking another member for taper these parameters will be applied IN CASE OF SELECTING A TAPERED MEMBER NOT ONLY THE MEMBER BUT THE TAPERING WILL BE SELECTED AUTOMATICALLY AND CAN BE MODIFIED IN THE PARAMETER TABLE AS SEPARATE OBJECT IMPORTANT TO KNOW THAT FOR THE TAPERED MEMBERS NEW SECTIONS ARE CREATED DURING THE AUTOMATIC FINITE ELEMENT GENERATION WITH APPROPRIATE SECTION HEIGHTS THESE NEW SECTIONS
83. which distributes surface loads to members as line loads This is very useful in those cases when surface load need to be distributed to members like floor loads snow and wind load etc www stablab net a BLAB After clicking on the icon on the LOADS tab a dialog window appears Bo Bomex xine Local eccentricity 0 mm i i Cose pistibuton method Apply J ox Just like in the two dimensional figure drawing there are different possibilities to draw the surface draw a rectangle draw leaning rectangle draw circle draw polygon After drawing the surface it is possible to select the members to which the surface distributes the load There are two options distribute load to the selected members or distribute load to all members covered by the surface in the surface plane If second option is clicked then the appropriate members will be highlighted If none of the options is clicked then the second one will be applied as a default Distribute load to the selected members Distribute load to all members in the surface plane o www stablab net S TABLAB It is also possible to choose the first option and select members for carrying the surface load or remove members from the selection using the SHIFT left click After the corresponding members have been selected and OK is clicked then the surface is created Surface load can be placed by using the method described

STABLAB 2013 USER MANUAL

Contents

Download Pdf Manuals

Related Search

Related Contents