Pad Expert - Perico AS
Contents
1. Mpoextcodrt Pad Expert v 1 0 2008 VI3UHCNABAHE H OpasMEepABaAHE Ha KOPABH EAHHHHHH CTOMAHOGETOHHY dyHAaMeHTv c Npo sBONHA chopmMa O6ext 3ananua Nogo6ext Cectaann fata Knwenr Nposepnn K TK TeometTpuva Ha OCHOBHATA NNOCKOCT Tun cevenne Npasobtronso KourypHe town b 4 000 m h 3 000 m DOmbAKHTeNeH TOBAap Ha NOSbpXHOCTTa p 0 000 kN m2 h 1 000 m 18 000 kN m3 EErEE Don Tosap De OG6parna sacuma Brortowoa taj i m Osem terno ga 1a iin Pyaamer Dedenna hon 0 7 m Oem terno g 25 Wima IV Konor Paspesu V Hanpexenna Paspe3 1 Cnarave cr 4 500 500 1 5007 1500 1500 4 fk ge i 2500 NPOEKTCOOT Software Package Design Expert version 2 0 Design and detailing of single stiff RC foundation pads with arbitrary shapes All rights reserved 2011 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes TABLE OF CONTENTS ABOUT THE PROGRAM wisssinsrccsdvssnsendennvesavanseecansasecennantususunrsescsesoserstineneusitinsnssseeeeusnniews 3 ENTERING DATA ticcicsntiscinsnpessssdedscinenvesssustesnsseeeventiectuinvincapsnisecdvaariesnpussvesssexewmiennnenies 3 WOKING WICH Te DSS arrn A 3 FILES aean E ceusunanersansecesusncosenisuisseascasoeseuseiessausmensvaucneeussnaners 4 INPUT DATA sarisirrirsrisinnni aa EAEE EE 4 Sy CAI a a E E TA A2. 4 00 00 4 00 tl 2 000 m t2 2 000 m Settlement foundation with zero stiffness smax 4 29 cm Manual check s p B By w 1 v Ep 200 8 00 4 00 1 96 1 0 27 20000 0 0430m 4 30cm Example 6 Calculation and design of rectangular foundation Geometry Data Outline Points No Xm Ym ra 2000 1 500 2 2000 1 500 Shape Type Rectangular y a 2000 1 500 a 2000 1 500 b 4 000 m h 3 000 m 2 00 00 2 00 Surface Load p 0 000 kN m2 Backfill Height h 1 000 m Backfill Unit Weight y 18 000 kN m3 cTp 19 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Foundation Height hy 0 700 m Concrete Unit Weight Y 25 000 kN m3 Foundation Depth t 1 700 m Allowable Base Stress Ro 200 000 kPa Loads Data Number Of Load Cases 3 Moe Columns Load Cases a No fxm ym bm hm a 0 000 0 000 0 600 0 600 Load Types S Serviceability U Ultimate E Earthquake Loads Case Column N kN Mx kNm My kNm Pia Ka 2200 000 0 000 0 000 Piz Ka 1800 000 0 000 0 000 ts Ka 1700 000 500 000 0 000 Design Data Concrete B20 Rb 11 50 MPa Yb 1 000 Reinforcement AIII Rs 375 MPa ys 1 000 sf pn Design Sections Sections Dimensions No x1 m Yn m x2 m 2 m_ bm hm am a 0 300 1 500 0 300 1 500 2 0300 1 500 0 300
3. 1 500 Ee 0 700 0 a 0 700 Settlement Data Soil Layers No Eo kPa ni a 12000f of 67 Zero Stiffness Foundation Load For Settlement Calculation pn 186 000 kPa Calculate Settlement For Point X 0 000 Y 0 000 Divisions for Numerical Integration 20 cTp 20 oT 21 R Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Base Stress Results Base Stress kPa Neutral Axis Coordinates Uplift m un ian 1c toaa a vi x2 v2 Pae 297 7 1855 1772 Px 227 7 185 5 230 7 Pea 2277 1855 1137 P2 227 7 185 5 2307 Pes 2277 1855 2307 Cpa 2277 2855 1147 Base Stress Checks R 200 kPa 1 3 R 260 kPa 1 5 R 300 kPa 4 R 800 kPa Internal Forces Results Bending Moments For Each Load Case kNm Shear Forces For Each Load Case kN Section m m2 m3 sexon gi o2 o3 sa 7948 650 3 808 3 sa 935 0 765 0 905 8 s2 794 8 650 3 420 0 s2 7935 0 765 0 539 2 s3 528 0 432 0 208 0 s3 7880 0 720 0 680 0 sa 528 0 432 0 208 0 sa 880 0 720 0 680 0 RC Design Results Bending Design Section Mmax kNm x em As em2 m Reinforcement sa 808 30 371 11 38 16N18 npes 20 ponna s2 _794 75 3 65 11 18 16N28 npes 20 aoma sa 52800 179 5 4921N12 npes 20 aoma Shear Design Punching Design Um cm pmax kN cm pu kN cm Section Qmax KN Qb KN sa 935 00 lt 10
4. bottom and sides If there is a difference use the most unfavorable value Starting mark number Use this setting when you are going to have several foundations in one CAD drawing Enter the starting mark number to be greater than the last mark number of the previous foundation cTp 9 oT 21 R Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Reinforcement Enter diameter and spacing for bottom and top bars in both directions X and Y When you go to the Drawing page for first time reinforcement is automatically selected by the program Selection is based on design results for most unfavorable section that crosses the respective bars Bars can be straight or U shaped Higher foundations may require additional horizontal reinforcement along sides which is not generated in this version of the program and should be added manually Foundations with complex shapes are meshed automatically and may have different bar lengths in same direction Bars longer than 12 m are not split and lapped automatically Export to ZWCAD AutoCAD and other applications Click the a Nil button to export the drawing to ZWCAD AutoCAD Version 2009i and higher is supported for ZWCAD and 15 2000 and higher is supported AutoCAD If ZWCAD AutoCAD is opened then program draws into the active document If it is not opened then new session is Started automatically Drawing is made from lines
5. 2 00 1 848 1 848 Shape Type Circular 1 663 1 663 1 414 1 414 1 111 1 111 0 765 0 765 0 390 0 390 a Il Aa O 3 Settlement foundation with zero stiffness Smax 3 82 cm Manual check s p B 1 v Eo 200 4 00 1 00 1 0 27 20000 0 0384 m 3 84 cm infinite stiff foundation Smax 3 02 cm Manual check s p B 1 v Eo 200 4 00 0 79 1 0 2 20000 0 0302 m 3 02 cm cTp 16 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Example 2 Circular hollow foundation Geometry Data Outline Points nof m ym io Xm vm 34 1000 0 000 0 195 0 383 37 0 556 0 707 0 831 0 924 0 981 1 000 0 981 0 924 0 831 0 707 47 0 556 0 383 0 195 0 000 0 195 0 383 0 556 0 707 0 831 0 924 57 0 981 1 000 0 981 0 924 0 831 0 707 0 556 0 383 2 00 00 2 00 Shape Type Circular hollow 1 111 2 000 m 0 765 32 000 m 0 390 1 000 m 17 0 000 0 390 Panes s1 Tonka 0 765 1 6 11 16 2 Zh 3 oh 4 46 80 1 111 1 414 ue 1 663 08 1 848 11 1 962 12 i 28 rin 1 663 i 29 raa raia f 3o 1 663 atin 31 1848 0 765 Da 32 1 962 0 390 0 195 33 2 000 0 000 0 006 Settlement foundation with zero stiffness smax 1 91 cm t 3 DV II Manual check s p Bo B a 1 v7 Eo 200 4 00 2 00 1 00 1 0 27 20000 0 0192m 1 92cm
6. E 4 Loading data irirrninrnni nai oE A A A E E a E E AE EE ET EET 5 SS GU OC A E 5 SEN A E a A EA A ETA E Racer n Na 5 RESULTS mirarn ana E S OA A 6 BaSe E a E E E errr ree 6 Ue ee E A ee 6 LATER al TOCOS nisnin iae taenuheseedeeneseiassea ae ewetautaswaananbapadatiaeteleuaiersanenasdanapserannind 6 Design to Bulgarian code NPBSUBK cccccsseenneeeeeeeeeenseeeeensennnnnneeeeeeeeeeeeeaunanneeeeeesnggs 6 BOT GIG sc wosiganiawenaeqicewssanasepigdwaaeata E E 6 SIELE T E E E E E E E E E E EE naan ares aeanauns 6 PONC an E A E S A 6 DESIGN 10 F UTO COO 2 aaa EA ETIA 7 SLS GUIG TT T E EE E E EEE TE T E T E E E E T 7 Sc eet TT A A E E A E E A E ee E E E ES eer 7 PONOR erre A E EEE E EIE IEE 7 SA S AE SI AEE T E PE T T E T E E T E E E E R eeesatac 8 Foundation with Zero SUMS Sax ciessnatssosssossiosebadesoss sons aA 8 Foundation with innte SUMNCSS rinira rA E iN 8 CALCULATION REPORT sisicccsncvtuctancvinnvanceenaeiecvtussaneesnavieewtnsesnersnabieeusenvaceeteanianetunesnenneews 8 DRAW ING crsa E E aunseeseuauaneds 9 S Ana E e E E E E E E 9 PESMA CAD OVS TE op a a a 9 ROCNU sorarrain T T A E ATE 9 Drawing scade and iore S2 erna EE EAIA 9 Bending SCHECUIG and BOM prrinissinorsireiiaeni aa oa a aaa a aa i 9 TOD OF CONC OlO eriin iae EER E AEA A A A amuauaunen 9 CON OCO COVED rra E E E E E E 9 Saring MaK AUMDET drenare aa 9 REINTOlCEINGNE sariini aan in a a a a Aaa 10 Export to ZWCAD AutoCAD and other applicationS s sasssssnssrnnsnr
7. design codes use zero stiffness models in calculation formulas Soil properties are entered in a table You can add multiple layers using the button The following data is required for each layer Eo general elastic modulus ni Poisson ratio h layer thickness Integration is performed until bottom of last layer is reached Effective depth is not calculated by the program Average base stress is required for calculations It is automatically determined from the specified loads but you can change this value Select stiffness zero or infinite For zero stiffness you should select either a point to calculate the settlement or a section to obtain the diagram of the deformed soil surface For infinite stiffness only one value is calculated for the settlement Distribution of base stress which in this case is not uniform is determined as well This requires mesh generation Enter mesh size The denser is the mesh the more accurate are the results A corresponding stiffness matrix is composed and a system of liner equations is solved Calculation time increases with the mesh density so avoid too dense meshes cTp 5 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Results Base stress Average stress Pave edge stress Peage and maximum corner stress Pmax are calculated as well as stress at each corner p These values are compared to the ad
8. polylines texts dimension lines circles and solid hatches There are no blocks or other complex objects and drawing can be easily edited In order to achieve better results set Text Placement to be Over the Dimension Line Without a Leader for current dimension properties Objects are divided in layers such as AXES CONC BARS SEC TEXT etc With submenu A v Save script file scr you can export a script file with the necessary commands for drawing the foundation Script can be loaded into ZWCAD AutoCAD with the SCRIPT command or Tools Run Script menu Export to other CAD systems can be developed on request You can also export the drawing as bitmap or metafile to other application through system clipboard Working with Design Expert CAD graphical environment Version 2 0 of Design Expert includes embedded graphical environment with a lot of commands to review edit and print drawings Commands Each command can be activated by typing its full name or some of the aliases into the command line or by the respective button in the toolbar Descriptions of all graphical environment commands are provided in the following table Command Abbreviation Description Z O Z O Z lt o acao __ Transfers the drawing into ZWCAD AutoCAD _ COPYMETAFILE CM Copies drawing to Clipboard as Metafile Deletes selected objects DISTANCE or DIST Measures distances SSS Pex EX X Ends current p
9. 53 00 52 935 00 lt 1053 00 ES sa Qmax lt Qb 0 6 Rbt b hO pmax Nmax Um Mx Wx My Wy lt pu Rbt hO Settlement smax 4 71 cm cTp 21 oT 21
10. CK assent anawececeaseusianau east EA EE EEE E EEO 13 CODY sess a E E E E 14 Method of transf ormatiO sinio aaa 14 Number Of repetitions cccccccccessecee essen nee ene e eee eseeeeee nen e nee neeeeeeeeeeeeeanennaanteeeeesnegs 14 PICK OOIE dascaneneatinesseoncounnaareguerianoocenasesdunnyssatuinasewesaneoaunvavadentuenmnewadeneG e EA 14 PVE HG CN arna E A E E E EE E EE E E E 14 Copy graphics to other Applications ccccccccccceee cece cence eee eee seceded eee eee e nesses ES 14 EXAMPLES rrn rer errr r rere Tere CTET ET CECCPET CCC ETT CET TCP TETTCECTCTC TCE TETCTCTCTCCT TCC TET Cree TT CCC TTT 15 Settlement of single foundations with different shapes ccc ccceee cece sees eee eee eeeeeeeeeeeeees 15 Settlement Ca Uae pandteucs teawraneccuavatascecenasouduniauesadauduestwscduaiiu sere aisncusceueauqunaaseuntmenio piers 15 Example 1 Circular fOUNGAUON asininerdsantserecneesaeiineneridnneeeiiaeteridneeaniiaenenienenniaannein 16 Example 2 Circular hollow foundation ccccceceeeeeecssceeeesennneneeeeeeessseeeeegennaaanneesnegs 17 Example 3 Square foundation ss ssssssssssrsrrssnrsnrnnrnnrnnrunrnnrnnrnnrnnrnnrunrnnrnnrnnrnnrunrnnrne 18 Example 4 Rectangular foundation ssssssssssssnsrrnrsnrnnsnrrrrnrenrnnrrennenennrrrnnrnrnrrrrnrenee 18 Example 5 Square hollow foundation sssssssssssssssnsssensssnnssnsnssnsnssnsnennssennenrenenesrnnee 19 Example 6 Calculation and design of rectangular fOUNCAtIO
11. N ccccceeeeseeeeeeeeeeeeeeeeenees 19 About the program Pad Expert is created for design and detailing of single stiff RC foundation pads with arbitrary Shapes Foundations are flat only with constant thickness Loads are applied on multiple rectangular columns defined by their positions and sizes Each column is loaded with vertical force N bending moments Mx and My and shear forces Qx and Qy at top of foundation Program calculates base stress and uplift if any Internal forces and main reinforcement are calculated for selected sections Punching checks are performed with respect to column position internal edge or corner and bending moments Settlement is calculated for arbitrary Shape for selected point or section and for either infinite or zero foundations stiffness Software is quick and easy with friendly user interface and is a valuable assistant to structural engineers Input data and results are printed in a professional html report Entering data Input data is divided into pages Dimensions Loads Design Settlement Results You should pass through all pages by clicking their tab in order to enter all data Click Results when you finish and you will go to another set of pages containing the results You can go back to input data by clicking the first tab Input data in each page is filled in text fields or tables You can move to the next field with left click or Tab key With Shift Tab key combination
12. ads with arbitrary shapes either cross or fit inside the rectangle if you draw from right to left All Click the button or press Ctri A You will select all objects except those which are in locked layers Deselect Click the button or press Ctrl D or Esc All selected objects will be deselected To deselect a single object click on it with right mouse button The Undo 21 command undoes last selection Modify objects Delete Removes all selected objects from both memory and screen In case of error objects can be restored using the Undo command immediately after that Delete command is started by the button or Del key Move Moves the selected objects along specified vector of translation Command is performed in the following sequence 1 Select objects 2 Press the 4 button 3 Pick the coordinates of the first and the second point of the translation vector Rotate Rotates the selected objects around specified centre and angle of rotation You are required to enter two points The first point defines the rotation centre and the second one is for the angle Angle is measured from the positive X axis towards the vector defined by the points Command is performed in the following sequence 1 Select objects 2 Press the button 3 Enter first and second point Scale Scales the selected objects with a specified factor This command requires two points The first one is for the base
13. ains a lot of objects it gets heavier and raster format is preferable It can be pasted to other programs in two formats Metafile and Enhanced Metafile The second one is recommended The program MS Word converts it to Word Picture after insertion If you try to edit the picture it is possible to damage it cTp 14 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Examples Settlement of single foundations with different shapes Next examples use the same input data as follows Surface load p 0 000 kN m2 Backfill depth h 0 000 m Backfill unit weigh y 18 000 kN m3 Foundation height hg 0 000 m Foundation unit weigh Y 25 000 kN m3 Foundation depth t 0 000 m Admissible base stress Ro 200 000 kPa Settlement data Soil layers No Eo kPa ni H m a 20000 0 2 1000 Nominal base load for settlement pn 200 000 kPa Foundation with zero stiffness Target point X 0 000 m Y 0 000 m Number of divisions for numerical integration 20 Infinite stiff foundation Mesh size 0 200 m cTp 15 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Example 1 Circular foundation Geometry Data Outline Points no x m Ym Noam vm 0 765 0 765 1 111 1 111 1 414 1 414 1 663 1 848 1 962 2 000 a eee 1 962 1 962 2 00 00
14. alog disappears and the user is prompted to enter two points that define the transformation parameters vector of translation angle of rotation etc If the First Second option is selected these points define the position of the second object relative to the first and the others are located after it If the option First Last is selected these points define the position of the last object relative to the first and the others are located between them Printing graphics Current screen view can be printed with the amp button A dialog box for selection of printer and paper format is displayed Press Start to send the drawing directly to the printer Only part of the drawing which is visible in the program window is printed Copy graphics to other applications The drawing can be copied to the Clipboard and then pasted to a CAD program or text editor e g Word and printed Only part of the drawing which is visible in the program window is copied Two formats are supported Raster Bitmap Command name is COPYBITMAP Data for the color of each pixel in the image is stored Image quality decreases when image is resized Image can be opened with MS Paint Vector Metafile Command name is COPYMETAFILE Coordinates of geometrical objects and their equations are stored Pixels are calculated each time when the image is displayed on screen In that case the image can be resized without affecting the quality When image cont
15. ata for each foundation is saved in a file with extension fun Design output is written to a fun html file in HTML format You can open a file by the Open command from File menu or by Ctrl O key combination You can save a file by the Save command from File menu or by Ctri S key combination When a file is saved for first time a standard dialog appears where you should select file path and name Otherwise file is saved using current file name You can change filename with the New command Input data remains unchanged To enter multiple foundations in one session do the following input the first calculate and draw click Save click New input the second calculate and draw click Save and so on Input data Geometry data Select foundation shape from the toolbar O 4 L O lt enter dimensions and click the Enter button Section is displayed in the drawing on the left side of the window Dimensions are displayed in the pictures bellow cTp 4 oT 21 R Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Coordinates x and y of outline points are entered for arbitrary shaped lt 4 foundations Circular and ring shaped foundations are approximated as polygons with sufficient number of points Foundation height and backfill height should be specified as well as their unit weights Loading data Add the required n
16. e command line first It is activated automatically when you press the first key Following formats are allowed for coordinate input Name _ s Format Example Description OZ O Z O Z Absolute 10 5 15 Absolute coordinates in OXY coordinate system Relative _AX AY 25 35 Relative distances 25 and 35 along X and Y from the last entered point o l Relative distance 100 from the last entered point Poar foe D measured at angle 45 from X axis L 50 Relative distance 50 from the last entered point measured at direction defined by the cursor Select and deselect objects Selection creates a group of objects using the mouse in order to apply certain command on them e g erase It can be done before or after the command Objects in locked layers cannot be selected even when they are visible on screen You can go to Selection mode by pressing the amp button or the Esc key The following ways for selection are available Single Position the mouse cursor over the object so that it crosses the small square and press the left button Selected object is colored in red Group Click the left mouse button near the objects you want to select and move the cursor to draw a rectangle around them Second click will select all objects which are entirely inside the rectangle if you draw from left to right Eon cTp 12 oT 21 SN i Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation p
17. erials T f t External CAD system Gaa a Sub concrete 10 cm Select an external CAD system ZWCAD or AutoCAD to export to See Export to ZWCAD AutoCAD and other Loncs cawet 9 0 om applications Starting mark number 1 Reinforcement symboal g Rounding Bottom reinforcement Shape You can set different rounding factors for dimensions and total lengths of bars Default values are 2 5 cm and 5 0 cm respectively Direction 3 g 12 20 cm Direction r o12 20 cm Drawing scale and text size D 4 orinted teres houd b fied Top reinforcement rawing scale and printed text size should be specified ae ee D Actual text size in the drawing is calculated automatically for the specified scale Direction 12 20 cm Direction S12 20 cm Bending schedule and BOM Bending schedule includes bar sketches with all dimensions as well as total number length unit weight and total weight for each bar mark Bill of materials BOM includes reinforcement weights for each diameter total weight kg concrete volume m and formwork area m Top of concrete Enter relative level for top of concrete t o c Ground level g I and foundation level f l are calculated using specified foundation depth and thickness All levels are displayed in the drawing Concrete cover Concrete cover is the distance from surface of bars to concrete surface Only one value is possible for all surfaces top
18. es the view to fit all objects into the program window cTp 11 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Pan Click the button Enter first point move the cursor at the desired direction and enter second point Screen view is moved at direction and distance defined by the vector between the two points Using a wheel mouse If you have a wheel mouse with three buttons you can pan without the above commands Click and hold the middle button move the mouse and release the button to pan the screen view Roll the wheel forward and backward to zoom in and zoom out the screen view respectively Coordinate input All objects in the drawing are defined in OXY coordinate system projected to the screen Some commands require the user to enter coordinates of points There are two ways to enter point coordinates 1 By left mouse click in the preferred position Current cursor coordinates are displayed in status bar when moving the mouse Precision tools Snap OSnap and Ortho help you to Snap the cursor to grid with spacing of 5 mm to an existing point or restrain it to horizontal vertical line When precision tools are turned off then a mouse click produces imprecise coordinates depending on current view scale 2 By typing with the keyboard Write coordinates in the command line and press Enter It is not necessary to click into th
19. infinite stiff foundation smax 2 30 cm cTp 17 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Example 3 Square foundation Geometry Data Outline Points No Xm Yim a 2 000 2 000 Shape Type Square 2 2000 2 000 a 2000 2 000 a 2000 2 000 2 00 00 2 00 Settlement foundation with zero stiffness smax 4 30 cm Manual check s p B 1 v EO 200 4 00 1 12 1 0 27 20000 0 043m 4 30cm infinite stiff foundation smax 3 30 cm Manual check s p B 1 v Eo 200 4 00 0 88 1 0 27 20000 0 043m 3 38cm Example 4 Rectangular foundation Geometry Data Outline Points Shape Type a 4 000 1 000 2 4 000 1 000 a 4 000 1 000 a 000 1 000 b 8000 m h 2 000 m 4 00 00 4 00 Settlement foundation with zero stiffness smax 3 76 cm Manual check s p B 1 v Eo 200 2 00 1 96 1 0 27 20000 0 0376m 3 76cm infinite stiff foundation smax 2 99 cm Manual check s p B 1 v7 Eo 200 2 00 1 61 1 0 27 20000 0 0376m 3 09cm cTp 18 oT 21 SN i Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Example 5 Square hollow foundation Geometry Data Shape Type Outline Points Square hollow No Xm Yim ra 4 000 4 000 2 4 000 4 000 b 8 000 m h 8 000 m
20. lar stress distribution Settlement You can choose between two theoretical models for calculation of settlement Foundation with zero stiffness Settlement is calculated for uniform load p at foundation base neglecting the foundation stiffness This approach is used by most design codes Calculations are performed by numerical integration of stress in depth according to the equation h a z 1 v gt f za v o Eo Z Stress z is calculated by numerical integration of base load in polar coordinate system which base point is the target point where settlement is calculated When settlement is calculated for a point only one value is provided as a result If section option is selected a diagram is provided showing deformed soil surface along the section Foundation with infinite stiffness Foundation is covered by square mesh with n elements and specified size a First deformation d in point f due to unit force F 1 applied in point J is calculated for each f and J Since it depends only on distance between points it is symmetrical and dj dj Total settlement in point f is a superposition of all points and is calculated by di gt dj F where F is unknown J Since foundation is infinite stiff displacements of all points should be equal to one value d which is also unknown That is how we obtain a system with n equations and n 1 unknowns n forces and 1 displacement Last n 1 equation necessary for the system is the
21. missible stresses The ones that fail are colored in red Values for each point are displayed in the drawing Admissible stress Ro should be provided considering the foundation size and depth The program does not adjust it automatically Uplift Uplift is calculated when tension occurs in foundation base Neutral line position and maximum stress are calculated by an iterative algorithm Target condition is that the ground pressure should balance the external loads Neutral line position is defined by two endpoints and is displayed in drawing as a blue dashed line It is not recommended to have uplift except for seismic loads Even then uplift should not be greater than half of the foundation For complex Shapes where half is not clearly defined uplift should not cross the center of area Internal forces Total bending moments and shear forces are calculated for each load case and each section All external forces base stress backfill weight foundation sell weight and surface loads on one side of the section are included into calculations Results are displayed in a table where rows correspond to load cases and columns correspond to sections Design to Bulgarian code NPBStBK Bending Bending design is performed for the maximum bending moment from all load cases using the equation M R ho 0 5 x b S 2 M Where x 1 LS o is compression zone height R bso The program calculates the required count and diameter of ba
22. nnenrnrrnnrrrnnrrrnnrnrnn 10 WORKING WITH DESIGN EXPERT CAD GRAPHICAL ENVIRONMENT sssssssssss2 10 COPA E a E EE A EE EEEE 10 Screen View Mana eM ICN oe cecutrdecnisur nto cogut pes e a Ae a a a anre 11 ZOON Mirean raaa a A EEEE 11 TOOT OUR seoran ecieateratenusumanereie etusemeneceaetenedentasnatenuie ese rime raceoceenene O 11 ZGOIN NV IMGOW sivccconseneaavautnaaanocnegscend avai aseianns questeesaunimnaseunitnseaeenonsaenranasaagueneecenLes 11 ZOOM FA naan canawnwesscavaahyaarsag ta derecesaeuryautaae vaca cage E E E E E tener 11 P E ieee adameseumadencenuaitoceumeanceauede E E 12 Using a wheel MOUSE sssnssusssonsssnnssnnnsnnsnrnnsnrnnsnrnnenreneuroneunnneunenesnsnennsnennsnrnnenrnne 12 OOF CIC HUE e A E A E E E A E E aaarys 12 Select and deselect objects ssnssssnsnsssnnssrnnsnrnnennnnsnnsnsnnsnsnnsnrnnenrnneunnnesnenesnnnrenrnren 12 SE E EEN E E E E EE N E E E E TN 12 LOUD DEEE A E T E E T E E E E T E E dane 12 PM E A E A E E EA A E A E E E AN 13 BIES e E E E PE E T E E E nt E E sear aoness 13 MOA ODIO ES oeer sa wees AE A AEE A tual E A E A E AE 13 DO E O A T Deane Mage eanees 13 IMOVG EOE O AE E E AP AE EE AE A E TTE 13 ROLIO sarras E E E E a E E A EEE 13 cTp 2 oT 21 R Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes DC OIC y iaauaatensanrareedwiaen a iaaiaisune E E ninaeese E E 13 VUITTON a a E E teaeei end ase see eg aie E 13 SLO CU
23. point and the second one defines the scale factor Command is performed in the following order sequence 1 Select objects 2 Press the button 3 Enter first and second point Mirror Mirrors the selected objects about a line defined by two points Command is performed in the following order 1 Select objects 2 Press the Ah button 3 Enter first and second point Stretch Geometric objects can be modified by stretching their grip points Select the object first Click with left button on the desired point to catch it Move the cursor to the new position and click again to release it Stretching a centre of a circle moves the circle and stretching points at 0 90 180 270 changes the radius If you had picked a point and you want to release it press Esc or right mouse button cTp 13 oT 21 R Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Copy Creates multiple copies of the selected objects Command is started with the button The Copy dialog appears where you have to define the following parameters Method of transformation The coordinates of the copied objects are calculated from the coordinates of the source objects through the preferred transformation as follows translation rotation copy E mirror alh Number of repetitions Objects can be copied multiple times as specified Pick points The Copy di
24. requirement for balance of vertical forces F p A where p is the average load at foundation base Linear system of equation is solved and unknown forces F and final displacement d are calculated Calculation report Professional html report can be generated for each foundation by going to the HTML report tab You can include all or part of calculations by checking the Print boxes next to titles of results pages Report is displayed in Internet Explorer by default but other web browsers can be used as well Most office programs like MS Word can edit html files Report filename is data_file_name html It comes together with a folder data_file_name html_files Always keep together report file with the folder Otherwise pictures and formatting will be lost cTp 8 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Drawing Go to Drawing tab Design Expert CAD is loaded and External LAD system ZWCAD hd foundation plan and section are displayed There is a panel Settings on the left side where you can enter different settings or Round dimensions 25 cm additional data for the foundation as well as bottom and Round lengths 5 0 cm top reinforcement in both directions Click the l Generation of drawing button each time you want to Drawing scale Mi 50 apply these settings to the drawing Printed text height 25 mm S Bending schedule ettin g S Bill of mat
25. rogram session few fer iTumnsgridonfot O O dilmen fm Mirrors objects inthe drawing SSS cTp 10 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes Cijnew IN Opensanewfile o OPEN 0 OP_ Opens an existing file o ORTHO OR Turnsorthogonal drawing on off O josnap Jos Tums snap to points on off the o Joum R O Sameas EXT o O REDRAW RD Redraws the screen ROTATE RO ooo Rotates objects in the drawing SELECT E SEL READY Enters select mode SELECTALL A ALL SELALL Selects all objects UNDO U Undoes ast command scrie so Saves SCRIPT fie with commands for ZWCAD AutoCAD E3 SE SEL U ZA ZOOMOUT ZOOMWINDOW Increases screen view to fit the selected window Screen view management All objects in the drawing are defined by their coordinates in Cartesian coordinate system OXY which is displayed in program window in certain scale This view can be scaled and moved using the following commands Zoom In Click the button Screen view is enlarged by 25 Zoom Out Click the button Screen view is shrinked by 25 Zoom Window Click the button Click with left mouse button and move the cursor to enclose the objects which you want to zoom into a rectangular window Click once again The image is zoomed to fit the selected window into the screen Zoom All Click the button This command scales and centr
26. rs using the specified spacing If bending moment is negative the reinforcement is positioned on top Shear Shear design is performed assuming there will be no shear reinforcement and only concrete Capacity is considered by the equation Qmax lt Qb 0 6 Rpbs Ao Punching Punching design is performed for all columns Columns can be eccentrically loaded and both bending moments are considered in the equation Pmax Nmax Um M W M W lt Pu Ro b ho cTp 6 oT 21 SN y Pad Expert v 2 0 2011 MPOEKTCOO OT Design and detailing of single stiff RC foundation pads with arbitrary shapes Punching load Nmax is calculated from column load reduced by a factor of 1 A A where A b 2 ho 2 ho is area enclosed by the effective perimeter at foundation base and A is total base area That is how load inside the effective perimeter is excluded Um 2 bk hk 2 h is length of mean effective perimeter and W b ho bk Ao 2 hk ho and W At ho i Ao 2 B Ao are first moments of inertia of mean effective perimeter in plastic state assuming rectangular stress distribution gt hO b hO You can have columns close to edges and corners If the effective perimeter intersects the concrete edge it is cut out Columns that are too close e g at expansion joints may fail together under total load and with common effective perimeter This is not considered by the program and user sho
27. uld perform additional calculations assuming there is one column with total load and dimensions Design to Eurocode 2 Bending Bending design according to Eurocode 2 is performed by procedures defined in RC Expert 2 0 Detailed description of calculation procedures is provided in RC Expert pdf Shear Shear design is performed assuming there will be no shear reinforcement and only concrete capacity is considered by the equation Vmax lt Vrac Crack 100 p fox bad 2 T __ Pete Punching H Punching design for eccentrically loaded column is performed using b i the equation l i Va P t lt Vrac Cras k 1009 fy 2 Vmin 0 035 ee fax b f u Me Critical perimeter u is located at distance 2d from column edge cTp 7 oT 21 R Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes For columns close to edge or corner critical perimeter is reduced accordingly see Design to Bulgarian code above Veg is the punching load which is calculated from column load excluding base stress inside the effective perimeter Reinforcement ratio is determined using the reinforcement calculated by bending design The eccentricity is considered by the following factor M u B 1 k Veg W Columns that are loaded by double eccentricity are calculated including both moments First moment of area W is calculated in plastic state assuming rectangu
28. umber of rows in Columns table using the key Enter coordinates x y and dimensions b and h for each column Dimension b is along x axis Then add the required number of load cases and their types as follows S serviceability U ultimate and E earthquake Load values for vertical force N bending moments Mx My and shear forces Qx Qy are entered for each column and each load case Positive direction l l ye hE of vertical force is downwards Bending moments are according to the picture on right Loads from foundation self weight and backfill are added x automatically Additional uniform surface load can be entered in the beginning HIY Design data Select concrete grade and steel grade Click the Table button to view material properties Internal forces are calculated for selected sections A section is defined by coordinates of endpoints that make a line Actual length of that line is not used Section dimensions b and h are entered instead as well as concrete cover a Sections can be generated automatically by the Generate sections button for foundations with simple shapes and 1 2 columns User should decide which are the relevant sections for more complex foundations and should fill in their endpoints and dimensions Settlement data Settlement of arbitrary shaped foundation on elastic layered half space is calculated for either infinite or zero stiffness using numerical integration Most
29. you can go back to the previous field Working with tables Most of the input data is filled in tables The following commands are used with tables add a row press the Ins key or the Up button or when you go to the last column press Enter to open a new row delete a row press Backspace or Down VY button Some tables have a fixed size and you cannot add or delete rows move the focus with a single cell use keyboard arrows e 1 4 gt cTp 3 oT 21 amp Pad Expert v 2 0 2011 MPOEKTCO T Design and detailing of single stiff RC foundation pads with arbitrary shapes move the focus to the first or last row press Page Up Page Down Home End edit cell contents press F2 or just start writing an input box is opened in the current cell end of cell edit press Enter or arrow the new data is saved to the cell cancel of cell edit press Esc existing data remains in the cell delete cell contents select single or multiple cells and press Del area selection use Shift arrows Page Up Page Down Home End or press left mouse button over the first corner drag to the opposite corner and release the button You can also click the first corner hold shift key and click the second corner copy multiple cells select an area and press Ctrl C paste multiple cells select an area or top left cell and press Ctrl V You can copy to and from external programs like Word Excel etc Files Input d
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