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® Integrated Building Design Software Introductory User's Guide

1. Show Joint Point _ Loads Form gt Joint Point Displays loads assigned to Points gt Frame Line Displays loads assigned to Lines Show Frame Line Loads Form Show Shell Area Loads Form gt Shell Area Displays loads assigned to Areas Set Input Table Mode Set Input Table Mode ices provides the user Data Tables Input with the opportunity to complete an onscreen Form review of the input parameters used in building the model Show Deformed Shape Display Static Deformed Shape p plots a Deformed Shape deformed shape onscreen based on user Form specified loads This plot can be animated Show Mode Shape zi plots a deformed shape Show Mode Shape Mode Shape Form onscreen based on user specified modes This plot can be animated Show Member Forces Stress Diagram gt Support Spring Displays support and spring reactions onscreen Point Reaction Reactions based on user specified loads Forces Form gt Frame Pier Displays column beam brace pier and span Member Force Spandrel Forces drel forces onscreen based on user specified Diagram for loads Frames Form gt Shell Stresses Displays internal shell element forces and Element Forces stresses onscreen based on user specified Force Stress loads Contours for Shells Form gt Link Forces Displays link forces onscreen based on user Member Force specified loads Diagram Form 12 2 Obtain Basic Graphical Displays Chapt
2. 3 Click the Modify Load button If necessary click the Modify Lateral Loads button to modify the automatic lateral load pa rameters Delete an Existing Static Load Case Use the following procedure to delete an existing static load case in the Define Static Load Case Names form Note that when you delete a static load case all of the loads that have been assigned to the model as a part of that static load case are also deleted Highlight the existing load case in the Loads area of the form Note that the data associated with that load case appears in the edit and drop down boxes at the top of the Loads area Click the Delete Load button Structural Loads 7 3 Introductory User s Guide Assign Structural Loads The loads cases defined in the previous section can be assigned to points joints lines frames and areas shells The user must first select the element before a load can be assigned to the element Chapter 6 of this guide describes how to select structural objects After the object has been selected click the Assign menu command to access the applicable submenu and assignment options Table 7 1 identi fies the submenus and options TABLE 7 1 Load Commands on the Assign Menu sub menus Joint Point Loads Frame Line Loads Shell Area Loads Force uniform assignment Ground Displacement Distributed options eases ee es Wind Pressure P Coefficient Note that the type of element selected determines which assignm
3. tion is performed using the actual beam sections assigned not auto select sections Only works on a user specified selection Allows the user to change the design section Select Sections property assigned to one or more beams and then Form rerun the design without first rerunning the analy sis Only works on a user specified selection Sets the design section for one or more beams Immediate back to the last used analysis section Only works Cannot use Undo on a user specified selection Verifies that the last used analysis section and the Immediate current design section are the same for all com posite beams in the model Reports if structural members have passed the Immediate stress capacity check An analysis and a de sign check of the structure must be completed before this command Resets the overwrites for all composite beams Warning message with the Composite Beam design procedure to Cannot use Undo their default values Deletes all of the composite beam design results Immediate but not the current design section i e next Cannot use Undo analysis section TABLE 11 5 Steel Joist Design Commands Command Action Fom Select Design Group 11 8 Designates that a group is to be used as a design Composite Design group Works only when auto select sections have Group Selection been assigned to the joints When grouped all Form objects in the given the same joist size Design the Structure TABLE
4. cludes the type and location of the view in the associated display win dow Status Bar The status bar is located at the bottom of the main win dow Text describing the current status of the program is displayed on the left side of the status bar Mouse Pointer Position Coordinates The mouse pointer position coordinates are displayed on the right hand side of the status bar A window does not need to be active for the mouse pointer position co ordinates to be displayed It is only necessary that the mouse pointer be over the window In a two dimensional plan or elevation view the mouse pointer position coordinates are always displayed In a three dimensional view the mouse pointer position coordinates are only displayed when the mouse pointer snaps to a point or a grid line inter section One Story Drop Down Box This drop down box is on the right side of the status bar The three options in the drop down box are One Story All Stories and Similar Stories With One Story an object is applied only to the story level on which it is drawn With All Stories an object drawn in the plan view is applied to all story levels in the model at the same plan location An assignment made to the selected objects also is made to the other objects in the same plan location at all other story levels With Similar Stories an object drawn in plan view is applied to all similar story levels in the model at the same plan loca tion An assign
5. Select Design Group Designates that a group is to be used as a design Composite Design group Works only when auto select sections have Group Selection been assigned to frame objects When grouped Form all beams in the group are given the same beam size but the shear connectors and camber may be different 11 6 Design the Structure TABLE 11 4 Composite Beam Design Commands Command Action Fom Select Design Combo View Review Overwrites Start Design using Similarity Start Design without Similarity Interactive Composite Beam Design Display Design Info Allows review of the default composite frame de sign load combinations defined by the program or designation of user specified design load combi nations Facilitates review or modification of loads during design Note that separate design load combinations are specified for construction load ing final loading considering strength and final loading considering deflection Allows review of overwrites which are parameters that the user specifies to change program de faults Overwrites apply only to the composite beams to which they are specifically assigned Assumes that if a composite beam is located at a story designated as similar to a master story that composite beam has the same composite beam size as the composite beams of the master story set a story Similar To a master story in the Story Data see the Edit menu gt Edit Story Data gt
6. after model creation is complete to get optimum Cannot use labeling for the model Undo Works with Ctrl and arrow keys to move objects Immediate Allows the user to select objects and move them a predefined distance For more information search for nudge using the Help Note With a form displayed on the ETABS window click the F1 key on your keyboard to access context sensitive Help for the form Editing Options 9 5 Chapter 10 Analyze the Model Objective This chapter describes how to analyze the model Model Analysis To run the analysis click the Analyze menu gt Run Analysis command or the Run Analysis button p and click the Run button on the Run Options form The program will display an Analyzing Please Wait window Data will scroll in this window as the program runs the analysis After the analysis has been completed the program performs a few more book keeping actions that are evident on the status bar in the bottom left hand corner of the ETABS window Objective 10 1 Introductory User s Guide When the entire analysis process has been completed the model auto matically displays a deformed shape view of the model and the model is locked The model is locked when the Lock Unlock Model button a appears depressed Locking the model prevents any changes to the model that would invalidate the analysis results 10 2 Model Analysis Chapter 11 Design Objective This chap
7. button down drag the mouse until it 1s below and to the right of the last grid intersection A selection box similar to that shown in Figure 5 3 should expand around the grid line intersections as the mouse is dragged across the model Release the left mouse button and the program will draw the column objects at the grid line intersec tions It is a good idea to save your model often Click the File menu gt Save command or the Save button f to save your model Add Structural Objects Manually 5 5 Introductory User s Guide PRETABS Nonlinear 8 00 Untitled File Edit View Define Draw Select Assign Analyze Display Design Options Help n EYR l o aol 6 B56 PAPAN weal e o nala jere Ah tamel xe n a re Hels mBaa ms y Pm Plan View STORY4 Elevation 612 Line Draw Mode OF Xx i 3 D View Line Draw Mode Fe AA z Q r a B Properties of Object Property A LatCol Angle 0 Plan Offset x D Plan Offset Y D Plan View STORY4 Elevation 612 x703 76 Y1127 55 2612 00 Similar Stories I GLOBAL I Kip in x Figure 5 3 Drawing Column Objects in a Windowed Region Draw Beams Make sure that the Plan View is active Click the Create Lines in Re gt Create Lines in Region or at Clicks command The Properties of Object pop up box for beams shown in Figure 5 4 will appear Properties of Object Ea Type of Line Frame Property 4 LatB mi Moment Releases Continuous Plan
8. command A portion of the self weight can be applied to any static load case The self weight multiplier controls what portion of the self weight 1s included in a load case A self weight multiplier of 1 includes the full self weight of the structure in the load case A self weight multiplier of 0 5 includes one half of the self weight of the structure in the load case Structural Loads Chapter 7 Load the Structural Model Normally a self weight multiplier of 1 in one static load case only should be specified usually the dead load load case All other static load cases then have self weight multipliers of zero Note that a self weight multiplier of 1 1s included in two different load cases and then those two load cases are combined in a load combination the results for the load combination are based on an analysis where double the self weight of the building has been applied as a load Modify an Existing Static Load Case Use the following procedure and the Define Static Load Case Names form to modify an existing static load case Recall that the Define Static Load Case Names form is accessed using the Define menu gt Static Load Cases command or the Define Static Load Cases button 1 Highlight the existing load case in the Loads area of the form Note that the data associated with that load case appears in the edit and drop down boxes at the top of the Loads area 2 Modify any of the data in the Loads area for the load case
9. entirely in the associated plane to be selected by Groups Select the name of any collection of objects that has been defined as a group from the Select Group box and that group will be selected by Frame Select a frame section property name from the Se Sections lect Sections box and all line objects that have been assigned that frame section property will be se lected by Wall Slab Deck Select a wall slab deck section property name from Sections the Section Selections box and all area objects that have been assigned that wall slab deck section property will be selected by Link Select a link property name in the Select Properties Properties box and all line objects that have been assigned that link property will be selected 6 4 Menu Methods of Selecting Objects Chapter 6 Select Structural Objects Table 6 1 Subcommands of the Select Menu Command Command Action After Command by Line Select a line objects type from the Select Line Ob Object Type ject Type box and all line objects of that type will be selected The choices for the types of line objects are column beam brace null or dimen lines short for dimension lines by Area Select an area objects type from the Select Area Object Type Object Type box and all area objects of that type will be selected The choices for the types of area ob jects are floor wall ramp or null Note that openings are a subset of null area objects by PIER ID Select a Pier La
10. immediately view the results Allows review of some of the results of the steel frame design directly on the program model Ex amples of results that can be displayed include design sections unbraced lengths effective length factors allowable stresses and stress ratio information Removes auto select section lists from selected frame elements Typically used near the end of the iterative design process so that the final de sign iteration is performed using the actual frame sections assigned not auto select sections Only works on a user specified selection Allows the user to change the design section property assigned to one or more frame elements and then rerun the design without first rerunning the analysis Only works on a user specified se lection Sets the design section for one or more frame elements back to the last used analysis section Only works on a user specified selection Verifies that the last used analysis section and the current design section are the same for all steel frame elements in the model Design the Structure Immediate no form used No form results are displayed onscreen Display Design Results Form Warning message Cannot use Undo Select Sections Form Immediate Cannot use Undo Immediate Chapter 11 Design TABLE 11 2 Steel Frame Design Commands Command Action Fom Verify All Members Reports if structural members have passed the Immediate Passed stres
11. of Object pop up box for columns shown in Figure 5 2 will appear 5 4 Add Structural Objects Manually um Note y The definition parameters and drawing controls available in the Proper ties of Object box differ depending on the drawing command button selected Always check that the parameters and controls are what you need for the type of object you are drawing Chapter 5 Create the Structural Model Properties of Object Es 4 LatlCol Continuous Moment Releases Plan Offset Plan Offset r Figure 5 2 Properties of Object Box for Columns The Properties of Object box provides various definition parameters and drawing controls Review the parameters and controls shown in this box before drawing your column to ensure that they are what you want Change any entry in the box by clicking on it and making a new selection from the drop down box or typing in new information into the edit box as appropriate After checking the parameters in the Properties of Object box left click once in the Plan View at the intersection of the grid lines where you want the column An I shaped column should appear at that point in the Plan View Continue in this manner to place other columns Alternatively draw the remaining columns in one action by windowing around the grid intersections To window click the left mouse button above and to the left of your first grid intersection and then while hold ing the left mouse
12. using a particular command Auto Select Section List ETABS s Auto Select Section List feature helps to control the time re quired to develop the model as well as to enhance the design process An auto select selection list is simply a list of sections for example W18X35 W18X40 W21X44 W21X50 and W24X55 Auto select sec tion lists can be assigned to frame members When an auto select selec tion list is assigned to a frame member the program can automatically select the most economical adequate section from the auto select section list when it is designing the member The program has several built in auto select section lists However the user can also develop a tailored list using the following steps Auto Select Section List 8 3 Introductory User s Guide 1 Click the Define menu gt Frame Sections command which will dis play the Define Frame Properties form shown in Figure 8 1 Define Frame Properties Properties Type in property to find C Add Wide Flange FOD Modify Show Property Delete Property Figure 8 1 The Define Frame Properties form 2 Click the drop down box that reads Add I Wide Flange in the Click To area of the Define Frame Properties form Scroll down the re sulting list of potential Add sections to locate Add Auto Select List Double click on it The Auto Selection Sections form shown in Fig ure 8 2 appears 3 Type a name for the list in the Auto Section Name edit box A
13. 11 5 Steel Joist Design Commands Command Action Fom Select Design Combo View Review Overwrites Start Design using Similarity Start Design Without Similarity Interactive Steel Joist Design Display Design Info Allows review of the default steel joist design load combinations defined by the program or designa tion of user specified design load combinations Facilitates review or modification of loads during design Allows review of overwrites which are parameters that the user specifies to change program de faults Overwrites apply only to the steel joists to which they are specifically assigned Assumes that if a steel joist is located at a story designated as similar to a master story that steel joist has the same joist size as the steel joists of the master story set a story Similar To a master story in the Story Data see the Edit menu gt Edit Story Data gt Edit Story command Excludes the similarity features described in the description of the Start Design using Similarity command Can be applied to a user specified selection only ALWAYS use this command for final design Allows the user to review the design results for any steel joist and then to interactively change the design overwrites and immediately view the re sults Allows review of some of the results of the steel joist design directly on the program model Exam ples of results that can be displayed include joist labels and ass
14. ARRANTY IS EXPRESSED OR IMPLIED BY THE DEVELOPERS OR THE DISTRIBUTORS ON THE ACCURACY OR THE RELIABILITY OF THE PROGRAM THE USER MUST EXPLICITLY UNDERSTAND THE ASSUMPTIONS OF THE PROGRAM AND MUST INDEPENDENTLY VERIFY THE RESULTS Contents Introductory User s Guide Introductory User s Guide Oo dO N OO a A 0O N ee oOo po oOo Program Description ETABS Screen Basic Modes Drawing Tools Mouse Pointers Begin a Model Create the Structural Model Select Structural Objects Load the Structural Model Assign Change Properties Edit the Model Geometry Analyze the Model Design Graphical Displays Generate Results Contents 1 Chapter 1 Program Description Objective This chapter briefly describes the program and some of the concepts in volved in its use This Is ETABS Objective ETABS is a powerful program that can greatly enhance an engineer s analysis and design capabilities for structures Part of that power lies in an array of options and features The other part lies in how simple it is to use The basic approach for using the program is very straightforward The user establishes grid lines places structural objects relative to the grid lines using points lines and areas and assigns loads and structural prop erties to those structural objects for example a line object can be as signed section properties a point object can be assigned spring proper ties an area object can be ass
15. ETABS Integrated Building Design Software Introductory User s Guide COMPUTERS amp STRUCTURES Computers and Structures Inc TE Berkeley California USA February 2003 Copyright The computer program ETABS and all associated documentation are proprietary and copyrighted products Worldwide rights of ownership rest with Computers and Structures Inc Unlicensed use of the program or reproduction of the documentation in any form without prior written authorization from Computers and Structures Inc is explicitly prohibited Further information and copies of this documentation may be obtained from Computers and Structures Inc 1995 University Avenue Berkeley California 94704 USA Phone 510 845 2177 FAX 510 845 4096 e mail info csiberkeley com for general questions e mail support csiberkeley com for technical support questions web www csiberkeley com Copyright Computers and Structures Inc 1978 2003 The CSI Logo is a registered trademark of Computers and Structures Inc ETABS is a registered trademark of Computers and Structures Inc Windows is a registered trademark of Microsoft Corporation Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated DISCLAIMER CONSIDERABLE TIME EFFORT AND EXPENSE HAVE GONE INTO THE DEVELOPMENT AND DOCUMENTATION OF ETABS THE PROGRAM HAS BEEN THOROUGHLY TESTED AND USED IN USING THE PROGRAM HOWEVER THE USER ACCEPTS AND UNDERSTANDS THAT NO W
16. Edit Story command Excludes the similarity features described in the description of the Start Design using Similarity command Can be applied to a user specified selection only ALWAYS use this command for final design Allows the user to review the design results for any composite beam and then to interactively change the design overwrites and immediately view the results Allows review of some of the results of the com posite beam design directly on the program model Examples of results that can be displayed include beam labels and associated design group names design sections together with connector layout camber and end reactions and stress ratio information Design the Structure Chapter 11 Design Design Load Combinations Selection Form Overwrites Form Immediate no form used Immediate no form used No form results are displayed onscreen Display Design Results Form 11 7 Introductory User s Guide TABLE 11 4 Composite Beam Design Commands Command Action Fom Make Auto Select Section Null Change Design Section Reset Design Section to Last Analysis Verify Analysis vs Design Section Verify All Members Passed Reset All Composite Beam Overwrites Delete Composite Beam Results Removes auto select section lists from selected Warning message beams Typically used near the end of the itera Cannot use Undo tive design process so that the final design itera
17. I an object drawn on Story I typi cally appears in the same plan location on Story 2 5 2 The program provides default names for each story level for example Story 1 Story 2 and so on and assumptions for story level similarity Custom Story Data After choosing this option click the Edit Story Data button to bring up the Story Data form Enter values in the Story Data form to define your own story names story levels of non uniform height and customized story similarity The Story Data form also appears when the Edit menu gt Edit Story Data gt Edit Story command is used For more information about the Story Data form refer to the section entitled Edit Story Data Command in the Edit Menu chapter of the graphical user interface manual For more information about story level similarity search for similar stories drop down box using the Help menu gt Search for Help on command Story level similarity can also be significant to composite beam and steel joist design Search for similarity using the ETABS Help menu gt Search for Help on command for more information Add Structural Objects Using Templates Use the bottom half of the same Building Plan Grid System and Story Definition form as was used in the previous section to add structural ob jects to your model from one of several built in templates In many cases it is the simplest most convenient and quickest way to start your model The Add Structural O
18. Offset Normal Figure 5 4 Properties of Object Box for Beams 5 6 Add Structural Objects Manually Chapter 5 Create the Structural Model As explained previously the Properties of Object box provides various definition parameters Change any entry in the box by clicking on it and making a new selection from the drop down box or typing in new infor mation into the edit box as appropriate After checking the parameters in the Properties of Object box left click once in the Plan View on a grid line where a beam 1s to be placed A beam is drawn along the selected grid line Continue in this manner to place other beams Alternatively draw the remaining beams in one action by windowing around the grid intersections Windowing is explained in the previous section Click the File menu gt Save command or the Save button kal to save your model Draw Secondary Infill Beams Add secondary or infill beams by clicking the the Create Secondary Beams in Region or at Clicks button or the Draw menu gt Draw Lines Objects gt Create Secondary Beams in Region or at Clicks command Similar to the other drawing operations a Properties of Object pop up box will appear that provides the opportunity to define the pa rameters for the secondary beams To place the secondary beams left click once in the bay bounded by grid lines where the secondary beams are to be placed Similar to columns and the primary beams secondary beams ca
19. Z ordinates Reference planes provide a horizontal plane that can be used when drawing objects in elevation views to snap objects into place for more information search for snap Editing Options 9 3 Introductory User s Guide TABLE 9 1 Edit Commands in ETABS Immediate Command Form Used Toggle Edit Reference Lines Allows the user to create modify and delete ref Edit Reference erence lines Reference lines are vertical lines at Lines Form user specified global X and Y coordinates Ref erence lines can be used when drawing objects in elevation or plan views to snap objects into place for more information search for snap to Merging Points Merge Points merges points within the tol Merge Selected erance distance of the selected point The user Points Form specifies the tolerance distance on the Merge Selected Points Form Align Points Lines Edges Align Points Lines Edges amp helps the user Align Selected align objects in the model Search for edit points Points Lines lines edges using the Help menu gt Search for Edges Form Help on command for important notes about using this command Move Points Lines Move Points Lines Areas helps the user Move Areas move objects in the model Search for move Points Lines points lines edges using the Help menu gt Area Form Search for Help on command for more informa tion Expand Shrink Areas ct expands or shrinks an area object using a us
20. ach form has a drop down menu that allows the user to select the load case to be assigned Logically the available load cases vary depending on the type of assignment The forms also include other object assignment specific input fields that enable the user to refine the load assignment Search for static loads using the Help menu gt Search for Help on command for more information about the load commands Assign Structural Loads 7 5 Chapter 8 E S Assign Change Properties Objective This chapter describes how to assign or change the properties of struc tural elements in the model Properties In creating the model the user draws point line and area objects To en able analysis and design those objects must be assigned properties such as material properties frame sections wall slab deck sections link prop erties and loads among others Note that the assign menu lists the vari ous properties that can be assigned Also note that the assignment of loads was explained in Chapter 7 of this guide As shown in Table 8 1 the types of assignments available depend on the type of object Assignments also depend on the type of design e g steel versus concrete versus composite design Objective 8 1 Introductory User s Guide TABLE 8 1 Possible Assignments to Objects by Object Type Object Assignment Option Name of Input Form Rigid Diaphragms Panel Zones Restraints Supports Point Springs Lin
21. ately onscreen view the results Design the Structure 11 5 Introductory User s Guide TABLE 11 3 Concrete Frame Design Commands Command _ Action Fom Display Design Info Allows review of some of the results of the con Display Design crete frame design directly on the program model Results Form Examples of results that can be displayed include design sections unbraced lengths and longitudi nal reinforcing Change Design Allows the user to change the design section Select Sections Section property assigned to one or more frame sections Form and then rerun the design without first rerunning the analysis Only works on a user specified se lection Reset Design Section Sets the design section for one or more frame Immediate to Last Analysis elements back to the last used analysis section Cannot use Undo Only works on a user specified selection Verify Analysis vs Verifies that the last used analysis section and the Immediate Design Section current design section are the same for all con crete frame elements in the model Reset All Concrete Resets the overwrites for all frame sections with Warning message Overwrites the Concrete Frame design procedure to their Cannot use Undo default values Delete Concrete Deletes all of the concrete frame design results Immediate Design Results but not the current design section i e next Cannot use Undo TABLE 11 4 Composite Beam Design Commands Command _ Action Fom
22. bel name from the Select Pier IDs box and any Shell Area that has been assigned that name will be selected By Spandrel ID Select a Spandrel Label name from the Select Spandrel IDs box and any Shell Area that has been assigned that name will be selected by Story Level Select a story level from the Story Level box and all objects point line and area associated with that story level will be selected Selects all objects in the model whether they are visible or not Be careful using this command It liter ally selects all objects in your model Also use the Select All button all to execute this command Invert Changes the selection such that the currently se lected objects are no longer selected and all objects that are not currently selected are selected Menu Methods of Selecting Objects 6 5 Introductory User s Guide 6 6 Deselect Command Deselect objects one at a time by left clicking on the selected objects Alternatively use the Select menu gt Deselect command and its sub commands for quicker and more specific deselection actions This com mand provides access to subcommands similar to those described in Ta ble 6 1 except that executing the Select menu gt Deselect command and an associated subcommand deselects rather than selects an object s For example assume that you want to select all of the objects in your model except for those in a particular XZ plane Do this quickly and easily by first using the Selec
23. bjects area of the Building Plan Grid System and Story Definition form is reproduced herein for reference Add Structural Objects Steel Deck Staggered Flat Slab Flat Slab with Waffle Slab Tao Way or Grd Only Truss Perimeter Ribbed Slab Beams Add Structural Objects Using Templates Chapter 5 Create the Structural Model Note that the templates consist of two for steel building four for concrete building and one for grids only which means that no structural objects are added to the model from the template When an option button has been selected in the Add Structural Objects area its name will be high lighted When the Building Plan Grid System and Story Definition form opens the Grid Only selection is highlighted thus indicating that unless you select another template your model will have only a grid system Choose any of the templates by left clicking its associated button When one of the template buttons is chosen a form for that template appears Use the template form to specify various types of data for your model When you have finished specifying data on the template form click the OK button to return to the Building Plan Grid System and Story Defini tion form Click the OK button on the Building Plan Grid System and Story Definition form to complete the operation Note When using concrete building templates in this program beams and slab ribs joists are normally modeled with depths equal to the dimen
24. d System Use the Grid Dimensions Plan area of the form to define a grid line system Select from two options for defining the grid line system Uniform Grid Spacing Specify the number of grid lines in the X and Y directions and a uniform spacing for those lines Note that the uni form spacing in the X and Y directions can be different This option defines a grid system for the global coordinate system only If subse quently necessary edit the information using the Edit menu gt Edit Grid Data command For more information search for edit grid data using the Help menu gt Search for Help on command Note that the default global coordinate grid system is a Cartesian rectangular coor dinate system Use the Edit gt Edit Grid Data gt Edit Grid command to modify the grid system Custom Grid Spacing Label grid lines and define nonuniformly spaced grid lines in the X and Y directions for the global coordinate system After choosing this option click the Grid Label button to la bel grid lines and click the Edit Grid button to edit the grid system For more information search for grid labeling using the Help menu gt Search for Help on command The reasons for defining a grid system for the model include the follow ing Default elevation views in the model occur at each defined primary grid line in your model Structural objects added to the model from a template are added based on the grid line definitions in the
25. e Floor Framing Systems with Openings and Overhangs Steel Joist Systems Moment Resisting Frames Complex Shear Wall Systems Rigid and Flexible Floors Sloped Roofs Ramps and Parking Structures Mezzanine Floors Trussed Sys tems Multiple Tower Buildings and Stepped Diaphragm Systems and many more Technical Notes in pdf format are available using the Help menu gt Documentation and Tutorials command Those Notes explain how the program performs concrete frame design steel frame design composite floor design steel joist design and concrete shear wall design in accor dance with applicable building codes 2 This Is ETABS Chapter 1 Program Description Time Saving Options The program also includes options that allow you to reduce the time spent creating models Those options include the following Similar Stories Allows the user to make changes to multiple stories simultaneously Snap To Allows the user to place structural elements with accuracy Auto Select Sections Allows the user to define a list of sections for example W18X35 W18X40 W21X44 W21X50 and W24XS5 that can be assigned to a frame member The program can then automati cally select the most economical adequate section from the auto select section list when it is designing the member Vertical Load Transfer Frees the user from the chore of calculating the load on the members supporting the floor plate and determines the area tributary to
26. each member for live load reduction Templates and Defaults ETABS provides a number of templates that allow for the rapid genera tion of models for a wide range of common building types Those tem plates serve as a good starting point because they can be modified easily The program also includes templates for two dimensional and three dimensional frames that can be appended to an existing model The two dimensional option can be used to locate planar frames throughout a model The three dimensional option can assist in modeling conditions where several towers rest on the same base structure The program includes defaults parameters many of which are building code specific Those defaults are accessed using Overwrites and Pref erences The possible options available for overwrites and the default values for preferences are identified in the design manuals By using the built in templates and defaults the user can create a model in a matter of minutes Time Saving Options 1 3 Introductory User s Guide 1 4 Basic Process The following provides a broad overview of the basic modeling analysis and design processes Forms p O oe E a e e on S a S S a S n A WO N KF OD Set the units Open a file Set up grid lines Define story levels Draw structural objects Define frame properties Define loads Edit the model geometry Assign properties View the model Analyze the model Display re
27. ed design process TABLE 11 1 Start Design Commands Start Design using Similarity or Composite Beam Design pe 9n Start Design Without Similarity Desi imilari Steel Joist Design Start esign using ami ariyor Start Design Without Similarity Shear Wall Design Start Design Check of Structure 11 2 Design the Structure Chapter 11 Design It is important to understand that design in ETABS is an iterative proc ess That is the user should run the analysis and then perform the design and be prepared to run the analysis again and perform the design again It may be necessary to repeat this process several times before the design is complete The objective is to have the analysis sections match the design sections The program will report any differences The user should repeat the analysis start design process until the analysis and design sections match 1 e the program does not display an error message Tables 11 2 through 11 6 summarize the commands used in each type of design process Note With a form displayed on the ETABS window click the F1 key on your keyboard to access context sensitive Help for the form TABLE 11 2 Steel Frame Design Commands Command _ Action Fom Select Design Group Designates that a group is to be used as a design Steel Frame group Works only when auto select sections have Design Group been assigned to frame objects All frame objects Selection Form in the group will be given the same d
28. efine menu gt Frame Sections command or click the Define Frame Sections button rt The Define Frame Properties form will appear 2 Highlight the name of the Auto Select Section List to be checked in the Properties drop down list 3 Click the Modify Show Property button The Auto Selection Sec tions form appears the sections included in the selected auto select section list are listed in the Auto Selections area of the form 4 Click the Cancel button to close the form 8 6 Auto Select Section List Chapter 9 Edit the Model Geometry Objective This chapter describes how to edit the model quickly and easily while maintaining model integrity Editing Options Objective During the course of creating the model the model may require editing Table 9 1 identifies the various edit command available in ETABS Some are familiar Windows commands In most cases first select the point line or area object then click the ap propriate menu or button In some cases the action will be immediate e g the Undo or Redo commands In other cases a form will appear that allows the user to specify how the object is to be edited e g the Edit menu gt Align Points Lines Edges command brings up the Align Points Lines Edges form which allows the user to align points to the x y Z coordinate or to the nearest point or to trim or extend lines In other 9 1 Introductory User s Guide cases the command is a toggle that wh
29. en enabled will affect subsequent actions Note that the type of commands and options available depend on the type of object being edited TABLE 9 1 Edit Commands in ETABS Immediate Command Form Used Toggle Undo and Redo Undo 4 deletes the last performed action Immediate Redo restores the last step that was un done Cut Copy and Paste Generally similar to the standard cut copy and Immediate paste Windows commands with some ETABS specific behaviors Only active in plan or plan perspective view Delete Delete deletes the selected object s and all Immediate of its assignments loads properties supports Add to Model from Tem Add two dimensional and three dimensional 2 D or 3 D plate frames to the model Forms that access other forms Replicate Replicate ji replicates one or more objects Replicate Form and most of the object s assignments Note that that replicated objects will not replace objects al accesses ready placed at a location options form Edit Grid gt Edit Grid Data Edit Grid Data att edits the coordinate system Coordinate Resulting form allows user to select a previously Systems Form defined grid system define a new system add a that accesses copy of an existing system show modify an ex definition forms isting system and delete an existing system gt Add Grid at Selected Adds grid lines at selected points Add Grid Lines Points at Selected Point Form gt Glue Points to G
30. ent can be made For example a wind pressure coefficient assignment cannot be made to a joint point or frame line object Thus if a joint point object e g a column in plan or a frame line object e g beam has been se lected before clicking the Assign menu command the Shell Area Loads submenu will not be available A form will appear after clicking the Assign menu command the sub menu applicable to the type of object and the desired assignment option Table 7 2 identifies the forms generated when the various commands are used TABLE 7 2 Input Forms for Load Commands on the a Menu Joint Point Loads gt ti lt ilt i lt i i ai i i w O O Loads gt Force Point Forces Ground Displacement Ground Displacements Temperature Point Temperatures 7 4 Assign Structural Loads Chapter 7 Load the Structural Model TABLE 7 2 BE oa Forms for Load Commands on the eae Menu Command Name of Name of Input Form Form Frame Line Loads gt B C Point Loads Distributed Frame Distributed Loads Distributed Loads Temperature Line Object Temperatures Shell Area Loads gt Uniform Uniform Surface Loads Area Object Temperatures Wind Pressure Coefficient Wind Pressure Coefficients Note With a form displayed on the ETABS window click the F1 key on your keyboard to access context sensitive Help for the form Although the form names vary depending on the command used e
31. er 12 Graphical Displays TABLE 12 1 Display Menu Options Command Action Fom Show Energy Virtual Work Diagram Show Response Spec trum Curves Show Time History Traces Show Static Pushover Curve Set Output Table Mode Show Energy Virtual Work Diagram dis plays energy virtual work diagrams that can be used as an aid to determine which elements should be stiffened to most efficiently control the lateral displacements of the structure User defines forces and displacements Show Response Spectrum Curves Fs plots various response spectra after a time history analysis has been run Show Time History Traces ff plots various time history curves based on user specified data after a time history analysis has been run Show Static Pushover Curve wa displays various pushover curves based on user speci fied data after a static nonlinear analysis has been run Set Output Table Mode mal allows the user to select the type of information to include in the output tables Energy Virtual Work Diagrams Response Spectrum Generation Form Time History Display Definition Form Pushover Curve Form Display Output Tables Form Note With a form displayed on the ETABS window click the F1 key on your keyboard to access context sensitive Help for the form Obtain Basic Graphical Displays 12 3 Chapter 13 Generate Results Objective This chapter describes how to generate analysis and design
32. er specified offset value Areas Form Merge Areas Pa merges two area objects that Immediate have a common edge or overlap into one area Can use Undo object Mesh Areas Mesh Areas Mesh Selected areas using user specified meshing options Areas Form Search for mesh using the Help menu gt Search for Help on command for more informa tion Split Area Edges Adds point objects at the mid point of each edge Immediate of an area object Can use Undo 9 4 Editing Options Chapter 9 Edit the Model Geometry TABLE 9 1 Edit Commands in ETABS Immediate Command Form Used Toggle Join Lines Join Lines amp joins two or more collinear line Immediate objects with common end points and the same Can use Undo type of property into a single line object Divide Lines Divide Lines divides a line object into multi Divide ple line objects Selected Lines Form Extrude Point to Lines Creates line objects from points Options are Extrude Point to available for linear or radial extrusion This fea Lines Form ture is especially suited to creating beams columns from point nodes Extrude Lines to Areas Extrude Lines to Area creates area objects Extrude Lines to from lines Options are available for linear or Areas Form radial extrusion This feature is especially suited to creating area objects from beams Auto Relabel All Relabels all objects of the current model Com Warning mand cannot be undone Use this command message
33. esign sec tion Select Design Combo Allows review of the default steel frame design Design Load load combinations defined by the program or Combinations designation of user specified design load combi Selection Form nations Facilitates review or modification of loads during design View Review Allows review of overwrites which are parameters Overwrites Form Overwrites that the user specifies to change program de faults Overwrites apply only to the frame ele ments to which they are specifically assigned Set Lateral Specifies displacement targets in any direction Lateral Displacement Targets for various load cases Displacement Targets Form Design the Structure 11 3 Introductory User s Guide TABLE 11 2 Steel Frame Design Commands Command Action Fom Set Time Specifies time period targets for seismic analysis Time Period Period Targets Targets Form Start Design Check of Structure Interactive Steel Frame Design Display Design Info Make Auto Select Section Null Change Design Section Reset Design Section to Last Analysis Verify Analysis vs Design Section 11 4 Initiates design process If frame elements have been selected before this command is clicked only the selected frame elements will be de signed A building analysis must precede use of this command Allows the user to review the design results for any frame element and then to interactively change the design overwrites and
34. igned slab or deck properties Analysis and 1 1 Introductory User s Guide A 1 4 Note The ETABS Software Verification Manual documents analysis using ETABS design are then performed based on the structural objects and their as signments Results are generated in graphical or tabular form that can be printed to a printer or to a file for use in other programs In using the program you manage the File Edit the ETABS Menu model change the View Define properties or load Commands cases Draw something new in the model Select that File something Assign properties or loads Analyze the lt Edit model Display analysis results for checking Design View the structure apply various Options to achieve the de s Deine sired outcome with optimum effort and seek Help s Draw when you need it Those actions are the basis for the gt Se program menu structure Thus familiarity with the s Aen menu commands and their function is key to expand a Annee ing your ability to use ETABS s D Information about the various menu items is available Des ron using the Help menu gt Search for Help on command i or ae Help as well as by using the F1 key when a form is dis played on the ETABS screen The F1 key will display context sensitive help including descriptions of the types of input for the forms used in the program Familiarity with the menu commands will enable the user to create models for complex Composit
35. inate System used Window gt for Mouse Coordinates Separator Plan View Drawing and Assignments Options Mouse Pointer Similar Stories Feature r Position Current R Status Bar Coordinates Units 68 Points 67 Lines 1 Areas selected 721 47 Y826 51 2144 00 Alcosa F Figure 2 1 The ETABS graphical user interface Main Title Bar The main title bar includes the program and model names The main title bar is highlighted when the program is in use Move the main window by left clicking in the main title bar and hold ing down the mouse button as you drag the window around your screen Menu Bar The menu bar contains all of the program s menus Toolbars and Buttons Toolbar are made up of buttons Buttons pro vide one click access to commonly used commands Holding the mouse pointer over a toolbar button for a few seconds without clicking or holding down any mouse buttons will display a short description of the button s function in a small text box Display Windows A display window shows the geometry of the model and may also include displays of properties loading and analy sis or design results Up to four windows may display at any one time The ETABS Window Chapter 2 ETABS Screen Display Title Bar The display title bar is located at the top of the dis play window The display title bar is highlighted when the associated display window is active The text in the display title bar typically in
36. k Properties Additional Point Masses Joint Points Assign Diaphragm Assign Panel Zone Assign Restraints Assign Springs Assign NLLink Properties Assign Masses Frame Sections Frame Releases Partial Fixity Moment Frame Beam Type End Length Offsets Insertion Point Frame Output Stations Local Axes Frame Property Modifiers Frame Line Types Link Properties Frame NonLinear Hinges Pier Labels Spandrel Labels Line Springs Additional Line Masses Automatic Frame Subdivide Use Line for Floor Meshing Wall Slab Deck Sections Openings Rigid Diaphragms Local Axes Shell Stiffness Modifiers Pier Labels Spandrel Labels Area Springs Additional Area Masses Area Object Mesh Options Auto Line Constraint Frame Lines Shell Areas Assign Frame Properties Assign Frame Releases Special Moment Beams Frame End Length Offsets Frame Insertion Point Assign Output Station Spacing Axis Orientation Analysis Property Modification Factor Assign Frame Line Type Assign NLLink Properties Assign Frame Hinges Pushover Pier Names Spandrel Names Assign Spring Assign Mass Subdivide Don t Subdivide Cancel Yes No Cancel Assign Wall Slab Deck Section Assign Openings Assign Diaphragms Assign Local Axis Analysis Stiffness Modification Factors Pier Names Spandrel Names Assign Spring Assign Mass Area Object Auto Mesh Options Auto Line Constrain
37. ment made to the selected objects is made to the other objects in the same plan location at all similar story levels Current Units The current units are displayed in a drop down box located on the far right hand side of the status bar You can change the units at any time during the model creation process The ETABS Window 2 3 Introductory User s Guide The Aerial View Figure 2 2 shows an example of the aerial view window This window displays the entire drawing to help you move around the active window of a larger model and use the zoom feature to view smaller areas more easily Also use the aerial view to track which part of the model is dis played in the active window Each time the model is edited the aerial view is updated RETABS Example Building Fle Edit View Define Draw Select Assign Analyze Display Design Options Help ae L ol sle s 2 e a cafemncleelee elel Sle Ol ale Fim i hPlan View STORY4 Elevation 48 ri 1A Inv 7y Tf ul ys N II Plan View STORY 4 Elevation 48 10 74 68 05 248 00 Similar Stories x GLOBAL Kip t x Figure 2 2 Example of the aerial view 2 4 The Aerial View Chapter 3 Basic Modes Drawing Tools Mouse Pointers Objective This chapter briefly describes the two modes of user operation for ETABS identifies the drawing tools and describes how the appearance of the mouse pointer changes for various operations Select or Draw The
38. model Objects snap to grid lines when drawn in the model Objects mesh at their intersections with grid lines The grid lines in the model can be defined with the same names as are used on the building plans This may allow for easier identification of specific locations in the model Create the Basic Grid System 4 3 Chapter 5 Create the Structural Model Objective This chapter describes how to create the structural model It is assumed that you have read Chapter 4 Begin a Model or understand how to begin an ETABS model by defining a grid system Define Story Data Note The story data of an existing model can be changed us ing the Edit menu gt Edit Story Data gt Edit Story command Objective Story data is defined using the Plan Grid System and Story Definition form Figure 4 2 of Chapter 4 shows this form As described in Chapter 4 use the File menu gt New Model command and make a selection on the New Model Initialization form to bring up the Building Plan Grid System and Story Definition form Select one of the two options in the Story Dimensions Area of the form to define the story data Simple Story Data Enter values in the edit boxes to define the num ber of stories and a typical story height that is used for all story levels Introductory User s Guide can Note Story level similarity be signifi cant For example when Story 2 is Similar To Story
39. n Control toolbar buttons or the menus the pointer temporarily changes to the se panel and lection pointer If you do not click on one of the menus or toolbar but a Os tons the mouse pointer reverts to the draw mode pointer when you move Mouse to bring up your PaCK into the display window Mouse prop erties form Other mouse properties appearances are used for various actions in the program including Help Select Busy Text Select Vertical Resize Horizontal Resize and Move The appearance of the mouse pointers for those actions depends on the mouse pointer properties you specify Select or Draw 3 3 Chapter 4 Begin a Model Objective This chapter describes how to begin a model by creating the basic grid system Structural objects are placed relative to the grid system Create the Basic Grid System Begin creating the grid system by clicking the File menu gt New Model command or the New Model button 4 The form shown in Figure 4 1 will display Hew Model Initialization Do you want to initialize your new model with definitions and preferences from an existing edb file Press F1 Rey for help Default edb Ho Figure 4 1 The New Model Initialization form Objective 4 1 Note More infor mation about tem plates is available by searching for tem plate using the Help menu gt Search for Help on command 4 2 Introductory User s Guide Select the No butt
40. n be drawn by windowing over the appropriate bays Note the Approx Orientation parameter to set the span direction Click the File menu gt Save command or the Save button k to save your model Draw the Floor Make sure that the Plan View is active Click the Draw Areas button _ or select the Draw menu gt Draw Area Objects gt Draw Areas Add Structural Objects Manually 5 7 Introductory User s Guide command The Properties of Object pop up box for areas shown in Fig ure 5 5 will appear Properties of Object DECK Flan Offset Normal 0 Drawing Control None lt space bar Figure 5 5 Properties of Object Box for Areas Similar to columns and beams this Properties of Object box provides the opportunity to check and change the parameters for the area Change any entry in the box by clicking on it and making a new selection from the drop down box or typing in new information into the edit box as appro priate After checking the parameters in the Properties of Object box check that the Snap to Grid Intersections and Points command is active This will assist in accurately drawing the area object This command is active when its associated button 4 is depressed Alternatively use the Draw menu gt Snap To gt Grid Intersections and Points command to ensure that this command is active By default this command is active Left click once at a column to begin the floor area object at that column Then movi
41. n menu Rather the user should select a frame line object e g a beam and then click the Assign menu gt Frame Line gt Frame Section command or the Assign Frame Section button 4 This will bring up the Assign Frame Auto Select Section List 8 5 Introductory User s Guide Properties form In the Properties area of that form scroll down the list of properties to locate and highlight the name of the Auto Select Section List to be assigned AUTOLATBM in this example Note that when a name is highlighted in the list the name also appears in the edit box at the top of the list Click the OK button and the assignment of the Auto Select Section List named AUTOLATBM is complete Make an Assignment as the Object is Drawn An Auto Select Section List can also be assigned when the frame line object is being drawn on the model Using this method select the desired Auto Select Section list by name from the drop down box of the Proper ties of Object Box that appears when a drawing tool is selected Use of the drawing tools is described in Chapter 5 of this guide along with fig ures showing the Properties of Object boxes for point line and area ob jects Check the Sections in an Auto Select Section List As indicated previously several Auto Select Section Lists are built into the program To review the sections included in any Auto Select Section Lists whether built in or user specified complete the following steps 1 Click the D
42. ndow or Windowing Draw a window around one or more ob jects to select them To draw a window around an object first position your mouse pointer beyond the limits of the object for example above and to the left of the object s you want to window Then depress and hold down the left button on your mouse While keeping the left button 6 1 Introductory User s Guide 6 2 depressed drag your mouse to a position below and to the right of the object s you want to select Release the left mouse button to complete the selection Note the following about window selection v As you drag your mouse a rubber band window appears The rubber band window is a dashed rectangle that changes shape as you drag the mouse One corner of the rubber band window is at the point where you first depressed the left mouse button The di agonally opposite corner of the rubber band window is at the cur rent mouse pointer position Any visible object that is completely inside the rubber band window when you release the left mouse button is selected v As long as you are beyond the limits of the object s you want to select you can start the window at any point for example above and to the right below and to the left or below and to the right of the object s you want to select In all cases you would then drag your mouse diagonally across the object s you want to select v An entire object must lie within the rubber band window for the object t
43. ng around the perimeter of the floor object click once at other column intersections to draw the outline of the building Press the Enter key on your keyboard to complete the floor If you have made a mistake while drawing this object click the Select Object button to change the program from Draw mode to Select mode Then click the Edit menu gt Undo Area Object Add command To better view the floor addition click the Set Building View Options button When the Set Building View Options form appears check the Object Fill check box and the Apply to All Windows check box as shown in Figure 5 6 Click the OK button 5 8 Add Structural Objects Manually Chapter 5 Create the Structural Model o s aaqaaqadddad meee eeee 1 sisi sl lt i st lt 1 1 4 m m m a a a a a Figure 5 6 Set Building View Options form Click the File menu gt Save command or the Save button E to save your model Add Structural Objects Manually 5 9 Chapter 6 Select Structural Objects Objective This chapter describes how to select objects in the model Selection Options Objective The program has three basic methods of selecting objects Left click Left click on an object to select it If there are multiple ob jects one on top of the other hold down the Ctrl key on your keyboard as you left click on the objects A form will appear that allows you to specify which object you want to select Wi
44. ng message Overwrites Steel Joist design procedure to their default val Cannot use Undo Delete Steel Joist Deletes all of the steel joist design results but not Immediate Results the current design section i e next analysis sec Cannot use Undo TABLE 11 6 Shear Wall Design Commands Command Action Fom Select Design Combo Allows review of the default shear wall design load Design Load combinations defined by the program or designa Combinations tion of user specified design load combinations Selection Form Facilitates review or modification of loads during design 11 10 Design the Structure Chapter 11 Design TABLE 11 6 Shear Wall Design Commands Command Actin Fom View Review Pier Allows review of pier overwrites which are pa Overwrites Form Overwrites rameters that the user specifies to change pro gram defaults Overwrites apply only to the piers to which they are specifically assigned View Review Spandrel Allows review of spandrel overwrites which are Overwrites Form Overwrites parameters that the user specifies to change pro gram defaults Overwrites apply only to the span drels to which they are specifically assigned Define General Pier Allows the user to define a pier section using the Define General Sections Section Designer utility Pier Sections Form Assign Pier Sections Allows the user to assign a pier one of three sec Assign Pier Type tion types sections Form Start De
45. ny name can be used For the purposes of this description the new Auto Select Section List is AUTOLATBM 4 Scroll down the list of beam sections in the List of Sections to find the beams to be included in the list Click once on them to highlight them Note that the standard Windows methods for selecting items in a list can be used e g clicking on a beam and then pressing the shift key on the key board before selecting another beam will highlight all beams between the two selected beams 8 4 Auto Select Section List Chapter 8 Assign Change Properties Auto Selection Sections Auto Section Name JAUTOLATBM Choose Sections List of Sections Auto Selections WIT We gs i i ao MES Md Pe a gs F emye We ad Var ned J M 1 f Write es Vat ad Ao Figure 8 2 Auto Select Sections form 5 Click the Add button to add the selected beams to the Auto Selec tions list on the right side of the form 6 Click the OK button and then click the OK button in the Define Frame Properties form to accept the definition of a new Auto Select Section List called AUTOLATBM Assign the AUTOLATBM Auto Select Section List The AUTOLATBM Auto Select Section list created as described in the previous section consists of various sections that can be assigned to a frame element Thus in making the assignment the user should not se lect a point or area object in the model or click the Joint Point or Shell Area commands on the Assig
46. o be selected Note about Window Selections in Plan View When selecting by win dow in a plan view not a perspective plan view only the visible ob jects that lie fully in the plane of the plan view are selected In other words only the visible point objects horizontal area objects and hori zontal line objects within the select window are selected Intersecting Line Draw a line through one or more objects to select them To use this selection method click the Select menu gt using In tersecting Line command or the Set Intersecting Line Select Mode button Wi Then position your mouse pointer to one side of the ob ject s you want to select Depress and hold down the left button on your mouse While keeping the left button depressed drag your mouse across the object s you want to select Release the left mouse button to complete the selection Note the following about the intersecting line selection method v As you drag your mouse a rubber band line appears The rubber band line is a dashed line that changes length and orientation as Selection Options Chapter 6 Select Structural Objects you drag the mouse It extends from the point where you first de pressed the left mouse button to the current mouse pointer position Any visible object that is intersected crossed by the rubber band line when you release the left mouse button is selected v After using this method to make a selection the program defaults to the wind
47. ociated design group names de sign sections together with end reactions and design ratio information Design the Structure Chapter 11 Design Design Load Combinations Selection Form Overwrites Form Immediate no form used Immediate no form used No form results are displayed onscreen Display Design Results Form Introductory User s Guide TABLE 11 5 Steel Joist Design Commands Command _ Action Fom Make Auto Select Removes auto select section lists from selected Warning message Section Null joists Typically used near the end of the iterative Cannot use Undo design process so that the final design iteration is performed using the actual joists sections as signed not auto select sections Only works on a user specified selection Change Design Allows the user to change the design section Select Sections Section property assigned to one or more joists and then Form rerun the design without first rerunning the analy sis Only works on a user specified selection Verify Analysis vs Verifies that the last used analysis section and the Immediate Design Section current design section are the same for all steel joists in the model Verify All Members Reports if all steel joists have passed the Immediate Passed stress capacity check An analysis and a de sign check of the structure must be completed before this command Reset All Steel Joist Resets the overwrites for all steel joists with the Warni
48. on on that form and the form shown in Figure 4 2 will display Building Plan Grid System and Story Data Definition Grid Dimensions Flan Story Dimensions f Uniform Grid Spacing f Simple Story Data Edit stan Mata Number Lines ine Direction Humber of Stones Number Lines in Direction Typical Story Height Spacing ines Direction Bottom Story Height Spacing in r Direction sooo Custom Grid Spacing land labels Flat Slab with Waffle Slab Perimeter Beams Cancel Steel Deck Flat Slab Grd Only Tivo Way or Ribbed Slab Staggered Truss OF Figure 4 2 Building Plan Grid System and Story Data Definition form The Building Plan Grid System and Story Data form is used to specify horizontal grid line spacing story data and in some cases template models Template models provide a quick easy way of starting your model They automatically add structural objects with appropriate prop erties to your model We highly recommend that you start your models using templates whenever possible However in this example the model is built from scratch rather than using a template The form has OK and Cancel buttons which are used to accept or cancel the selections made on the form Click the OK button for any selec tions entries to be accepted Clicking the Cancel button cancels any se lections entries Create the Basic Grid System Chapter 4 Begin a Model Grid Dimensions Plan Define a Gri
49. ow selection mode Thus each time you want to use the Select menu gt using Intersecting Line command you must use 6 the menu or click Set Intersecting Line Select Mode button Wi Control and Left Click Hold down the Ctrl key on the keyboard and left click once on a point line or area object A Selection List form similar to the one shown in Figure 6 1 pops up identifying the objects that exist at that location Select the desired object by moving the mouse pointer over it and left clicking on it STORY4 Cancel Figure 6 1 Selection List Form Menu Methods of Selecting Objects Table 6 1 identifies the submenu commands and related actions accessed using the Select menu command Menu Methods of Selecting Objects 6 3 Introductory User s Guide Table 6 1 Subcommands of the Select Menu Command Command Action After Command on XY Plane Click on a single point and all objects point line and area that are in the same XY plane as the selected point are also selected The object must lie entirely in the associated plane to be selected on XZ Plane Click on a single point and all objects point line and area that are in the same global XZ plane as the selected point are also selected The object must lie entirely in the associated plane to be selected on YZ Plane Click on a single point and all objects point line and area that are in the same global YZ plane as the selected point are also selected The object must lie
50. r at Clicks Plan El Create Secondary Beams in Regions or at Clicks Plan W Create Braces in Regions or at Clicks Plan Draw Area Objects Draw Areas Plan Elev 3D Draw Rectangular Areas Plan Elev 1 Create Areas at Click Plan Elev Draw Walls Plan Create Walls in Regions or at Clicks Plan Draw Developed Elevation Definition ot Select or Draw Chapter 3 Basic Modes Drawing Tools Mouse Pointers Draw Section Cut Draw Dimension Line Draw Reference Point ES The draw mode remains enabled until you do one of the following to re turn to the select mode Click the Pointer button on the toolbar BR Press the Esc key on the keyboard Select a command from the Select menu The mouse pointer indicates which mode is enabled The appear ance properties of the mouse pointer are defined in the Windows Control Panel The mouse pointer properties are Normal Select Pointer and Al ternate Select pointer Note In select mode the pointer is the Normal Select Pointer If you are using Typically s the default settings the mouse pointer will look like this Le the properties for the mouse In draw mode the mouse pointer is the Alternate Select pointer If you by clicking on are using the default settings the mouse pointer will look like this T l the Windows Start menu A then Settings Note that while in draw mode if you run the mouse pointer over the the
51. results that can be printed to a printer or to a file for sharing with other programs Analysis and Design Results Analysis and design results can be printed to a printer or a file using the File menu commands Table 13 1 identifies the print commands Objective 13 1 Introductory User s Guide TABLE 13 1 File Menu Print Options Command Action Fom ene Allows the user to specify the paper size and orientation of the page Form Provides a snap shot of how the file will print in Graphics graphical format that is currently specified as active Print Graphics Print Graphics a prints whatever graphics N A are displayed in the active window to the printer Print Tables gt Input Prints tables of analysis input data to a printer Print Input or to a text file Tables Form gt Analysis Output Prints tables of analysis output data to a printer Print Output or to a text file Tables Form gt Print Design Prints tables of design output data to a printer Print Design Tables or to a text file based on which design the user Tables Form selects Steel Frame Concrete Frame Com osite Beam Steel Joist or Shear Wall Note With a form displayed on the ETABS window click the F1 key on your keyboard to access context sensitive Help for the form 13 2 Analysis and Design Results
52. rid Glues point objects that lie directly on grid lines Toggle Lines to those grid lines When a point object is glued 9 2 Editing Options Chapter 9 Edit the Model Geometry TABLE 9 1 Edit Commands in ETABS Immediate Command Form Used Toggle to a grid line and the grid line is moved the point object moves with the grid line Line and area objects that are attached to the point object when it is moved remain attached to the point object and move or resize as appropriate gt Lock OnScreen Grid Allows users to lock out the ability to move grid System Edit lines graphically on screen using the Reshape Object command Edit Story Data gt Edit Story Edit Story H allows changes to story labels Story Data heights master story designation Similar To Form designation splice point and splice height Allows changes to base story elevation gt Insert Story Inserts new story into the model Allows the user Insert New to define story name story height number of Story Form stories to insert location placement of inserted story ies and if the story is to replicate from an other story i e be a copy of another story in cluding properties gt Delete Story Allows user to select and delete a story from the Select Story to model Delete Form Edit Reference Planes Allows the user to create modify and delete ref Edit Reference erence planes Reference planes are horizontal Planes Form planes at user specified
53. s capacity check An analysis and a de sign check of the structure must be completed before this command Reset All Steel Resets the overwrites for all frame sections with Warning message Overwrites the Steel Frame design procedure to their default Cannot use Undo values Delete Steel Design Deletes all of the steel frame design results but Immediate Results not the current design section i e next analysis Cannot use Undo TABLE 11 3 Concrete Frame Design Commands Command Action Fom Select Design Combo Allows review of the default concrete frame design Design Load load combinations defined by the program or Combinations designation of user specified design load combi Selection Form nations Facilitates review or modification of loads during design View Review Allows review of overwrites which are parameters Overwrites Form Overwrites that the user specifies to change program de faults Overwrites apply only to the frame ele ments to which they are specifically assigned Start Design Check of Initiates design process If frame elements have Immediate no Structure been selected before this command is used only form used the selected frame elements will be designed A building analysis must precede use of this com mand Interactive Concrete Allows the user to review the design results for No form results Frame Design any frame element and then to interactively are displayed change the design overwrites and immedi
54. sign Check of Initiates design process If piers or spandrels have Immediate no Structure been selected before this command is used only form used the selected piers or spandrels will be designed A building analysis must precede use of this com mand Interactive Wall Allows the user to review the design results for No form results Design any piers or spandrels and then to interactively are displayed change the design overwrites and immediately onscreen view the results Display Design Info Allows review of some of the results of the shear Display Design wall design directly on the program model Exam Results Form ples of results that can be displayed include rein forcing requirements Capacity ratios and bound ary element requirements Spandrel Overwrites their default values Cannot use Undo Design Results Cannot use Undo Design the Structure 11 11 Chapter 12 12 Graphical Displays Objective This chapter describes how to display analysis results graphically Obtain Basic Graphical Displays Analysis results can be displayed graphically after the analysis has been run To display results click the Display menu and select the type of dis play desired Table 12 1 identifies the display options Objective 12 1 Introductory User s Guide TABLE 12 1 Display Menu Options Show Undeformed Show Undeformed Shape plots the unde No form results Shape formed shape onscreen are displayed Show Loads
55. sion from the top of the slab not bottom of slab to the bottom of the beam or slab rib Also beams are modeled as line elements in this program Thus slabs with out of plane bending capability span from center of beam to center of beam in the program model After the OK button on the Building Plan Grid System and Story Defini tion form has been clicked the model appears on screen in the main ETABS window with two view windows tiled vertically a Plan View on the left and a 3 D View on the right as shown in Figure 5 1 The number of view windows can be changed using the Options menu gt Windows command Note that the Plan View is active in Figure 5 1 When the window is ac tive the display title bar is highlighted Set a view active by clicking anywhere in the view window Add Structural Objects Using Templates 5 3 Introductory User s Guide PRETABS Nonlinear 8 00 Untitled File Edit View Define Draw Select Assign Analyze Display Design Options Help 1h Talg HHA EFIKI Similar Stories aul Plan View STORY4 Elevation 612 One Story z I GLOBAL I Kip in 7 Figure 5 1 The ETABS main window Add Structural Objects Manually Objects such as columns beams and floors also can be drawn manually as described in the sections that follow Draw Columns Make sure that the Plan View is active Click the Create Columns in Objects gt Create Columns in Region or at Clicks command The Properties
56. sults for checking Design the model Generate output Save the model Various forms are used in ETABS throughout the modeling analysis and design processes With a form displayed on the ETABS window click the Fl key on your keyboard to access context sensitive Help for the form Basic Process Chapter 2 ETABS Screen Objective This chapter briefly describes the ETABS screen or more accurately the graphical user interface The ETABS Window Objective The ETABS graphical user interface shown in Figure 2 1 includes the main window main title bar display title bar menu bar toolbars display windows status bar mouse pointer position coordinates and the current units Each of these items is described in the bulleted list that follows Main Window This window may be moved resized maximized minimized or closed using standard Windows operations Refer to Windows help available on the Start menu for additional information about those items Introductory User s Guide 2 2 Toolbars Main Title Bar File Edit View Define Draw Select Assign Analyze Display Design Options Help De Uyy nce S PSO PSP PP M uR Roae olna nr HFa Jezel h taml xean g Eege a lga nga ms I 67 R F Plan View STORY1 Elevation 144 P3 D View zo x Menu Bar K 4 Display Title Bar Display Title Bar Active Window Inactive Window m Coord
57. t Options Note With a form displayed on the ETABS window click the F1 key on your keyboard to access context sensitive Help for the form Not a form possible input parameters 8 2 Properties Chapter 8 Assign Change Properties View the assignment made to point line and area objects by right clicking on the object The appropriate Point Information Line Informa tion or Area Information form will display Click on the Assignment tab In each case select an object before executing the desired assignment command e g select a line object before using the Assign menu gt Frame Lines gt Frame Sections command As explained in Chapter 6 of this guide using the Ctrl key and left clicking on a location in the model can simplify the process of selecting objects when multiple ob jects may be present at the same location or if selecting objects is new to the user and seems challenging The availability of commands depends on the type of object selected The input forms include object assignment specific input fields that en able refinement of the assignment Modifications to the assignments can be made by accessing the input forms using the appropriate Assign menu command The forms include OK and Cancel buttons that can be used to accept or delete changes made to the forms Note that the combination of the type of object name of the command and name of the input form provides an indication of what can be achieved by
58. t menu gt Select All command and then using the Select menu gt Deselect gt XZ Plane command Get Previous Selection Command The Select menu gt Get Previous Selection command selects the previ ously selected object s For example assume you have selected some line objects by clicking on them and assigned frame section properties to them Use the Get Previous Selection command or the Get Previous Selection button ps to select the same line objects and assign some thing else to them such as member end releases Clear Selection Command The Select menu gt Clear Selection command and its associated Clear Selection button cl clear all currently selected objects It is an all or nothing command You cannot selectively clear a portion of a selection using this command Menu Methods of Selecting Objects Chapter 7 Load the Structural Model Objective This chapter describes how to define structural loads for the model Structural Loads Note An unlimited number of static load cases can be defined in ETABS Objective The program allows the user to define a variety of structural loads in cluding dead live earthquake and wind loads The user then assigns the loads to various structural objects in the model Note that the steel frame concrete frame composite floor steel joist and concrete shear wall design manuals describe design load combinations in accordance with building codes Define the S
59. tatic Load Case Name To add a static load case click the Define menu gt Static Load Cases command or click the Define Static Load Cases button to bring up Introductory User s Guide 7 2 the Define Static Load Case Names form Complete the following ac tions using that form 1 Type the name of the load case in the Load edit box The pro gram does not allow use of duplicate names 2 Select a load type from the Type drop down box 3 Type a self weight multiplier in the Self Weight Multiplier edit box see the explanation about the self weight multiplier that follows 4 If the load type specified is Quake or Wind select an option from the Auto Lateral Load drop down box 5 Click the Add New Load button Note If your selected an automatic lateral load in the Auto Lateral Load drop down box click the Modify Lateral Loads button and re view or modify the parameters for the automatic lateral load in the re sulting form Then click the OK button to return to the Define Static Load Case Names form SELF WEIGHT MULTIPLIER The self weight of the structure is determined by multiplying the weight per unit volume of each object that has structural properties times the volume of the object The weight per unit volume is specified in the material properties search for material properties using the Help menu gt Search for Help on command for more information about mate rial properties and the Material Properties
60. ter describes design using the ETABS design postprocessors Design the Structure The ETABS design postprocessors include the following Steel Frame Design Concrete Frame Design Composite Beam Design Steel Joist Design Shear Wall Design Objective 11 1 Introductory User s Guide To perform the design first run the analysis described in Chapter 10 then click the Design menu and select the appropriate design from the drop down menu The type of design available depends on the type of members used in the model That is the user cannot complete a shear wall design if no shear walls have been included in the model Similarly the commands used to execute a design depend on the type of design to be performed However each design has commands to address the following Review and or select design load combinations Review and or select overwrites Start the design or check of the structure Perform interactive design Display input and output design information on the model Generally the sequence for using commands is indicated by their avail ability In other words some commands must be used before other com mands become available This helps the user step through the design pro cess Search for process using the Help menu to access more informa tion about design processes and the sequence of commands Table 11 1 identifies the commands that are used to start design depending on the desir
61. two distinct modes in this program are the select mode and the draw mode The select mode allows you to select objects and is used for ed iting operations making assignments to objects and viewing or printing results By default the program is in select mode Chapter 6 describes the various methods for selecting points lines and areas in your model The draw mode allows you to draw objects Objective 3 1 Introductory User s Guide 3 2 The draw mode automatically enables when you select one of the fol lowing submenu options from the Draw menu or click on the corre sponding buttons on the toolbar Note that the views in parenthesis Plan Elev 3D after the command name indicate when the button will be ac tive for example the Draw Lines command button can be used in the Plan Elevation or 3D views but the Draw Walls command button can be used only in Plan view The names of the commands are assumed to ex plain the actions that will be accomplished The terminology in Re gions means within a bay and at Clicks means at the location of the mouse pointer in the model when you click the left mouse button More information about the Draw tools is available by searching for draw menu using the Help menu gt Search for Help on command Draw Point Objects 1a Draw Line Objects N Draw Lines Plan Elev 3D Create Lines at Regions or at Clicks Plan Elev 3D Create Columns in Regions o

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® Integrated Building Design Software Introductory User's Guide