seismi robot millenium

Introduction to Analysis Using Autodesk® Revit® Structure and Autodesk® Robot™ Structural Analysis Brian E. Johnson, P.E. – Autodesk, Inc.

SE336-1L This extended lecture class will focus on structural design for structural steel and reinforced concrete structures. The class will provide an overview of design workflows and structural design criteria using Autodesk Robot Structural Analysis and Autodesk Revit Structure as well as in-depth instruction on specific design tasks. You will learn how to optimize structural steel designs, design steel connections, and perform automatic and interactive concrete reinforcement design. You will also explore custom design options with the Robot Spreadsheet Extension. This class will not focus on analysis methodologies, rather it is intended to show the design and optimization functionality in Autodesk Robot Structural Analysis.

About the Speaker: Brian is a Structural Technical Specialist for Autodesk. He is an expert in structural modeling and design using Revit® Structure. Brian is a licensed structural engineer with over ten years of building design and consulting experience. During that time, he worked as a Project Engineer/Manager and Principal on a variety of structures. He earned a B.S. in Civil Engineering from the University of Texas at Austin. [email protected]

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Introduction to Analysis Using Autodesk® Revit® Structure and Autodesk® Robot™ Structural Analysis

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User Interface Autodesk® Robot Structural Analysis Professional’s User Interface is organized to maximize productivity. The menus are organized by workflow. The Layout Selector changes the workspace layout and Just-in-Time Toolbar to display tools appropriate for a specific task (e.g. Loads). The Object Inspector/Selector displays all the elements in the model and properties of selected elements. The status bar provides guidance to users based on the current selection or command. Finally, the workspace canvas has several display control tools to quickly adjust visibility settings.

Canvas Controls Here are a few helpful tips for navigating through Autodesk Robot Structural Analysis Professional.

Mouse Scroll wheel (Depressed) Pan

Mouse Scroll wheel (Scroll) Zoom

Shift+ Mouse Scroll wheel (Depressed) Orbit

Ctrl + Tab Cycle through Window stack

Shift + Ctrl + Tab Cycle through Window stack (reverse direction)


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Model Structure Exercise 1—Preferences NEW BUILDING DESIGN PROJECT

There are two types of Preference settings in Autodesk Robot Structural Analysis Professional. Access both from the Tools pull-down menu. Preferences are settings related to the workstation and user interface. Job Preferences define settings for each project. Define and save different settings depending on user preference and project settings for different regions.

1. Select New project… Building Design 2. Click Tools > Preferences… 3. Verify Regional Settings: United States. 4. Review each group of settings. Adjust as desired. 5. Click Accept or Cancel. 6. Click Tools > Job Preferences… 7. Select Imperial Units. 8. Under Materials, select American. 9. Select STEEL A992-50. 10. Click Modification to see Material Definitions. 11. Click Cancel. 12. Select Databases > Steel and timber sections. 13. Click Add database. 14. Select EURO. 15. Click Browse to see the location

of the databases. 16. Click OK. 17. Click Design Codes. 18. Click More Codes to see listing

of all available codes. 19. Click Cancel. 20. Review all other settings. 21. Click Save Job Preferences.

Additional Activities: • Explore preferences in more

detail. • Explore more of the Tools from

the pull-down menu.

Exercise 2—Modeling Grids, Stories, and Levels NEW BUILDING DESIGN PROJECT

In this example we will model grids and Stories using the Building Design project template. Notice that Z axis grids (or Levels) are different than Stories.

Grids 22. Click Axis Definition from Toolbar. 23. Enter X and Y axes definitions and click Add. 24. Click Apply. Click Close. 25. Switch to 3D View workspace.


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26. In the Object Inspector, select Story 1. 27. In the Properties Inspector, change the Top Story parameter to

14 ft [4.5 m].

Stories 28. Click Stories from Toolbar. 29. With Define graphically selected, assign Top Level to 24 ft [7.5

m]. 30. Click Add. 31. Select Define Manually with Reference Level: Story 2, No. of

repet: 2, and Height: 10 ft [3 m]. 32. Click Add. Click Apply. Click Close.

Additional activities: • Model Z-axis levels • Adjust the Numbering for X, Y, Z, and Stories

Exercise 3—Model Columns and Walls SE336-1L PROJECT_EX03.RTD

Next we will model vertical elements. Columns are bar elements and Walls are panel elements. Both are modeled from upper story to lower story by default. The dialogs allow selection of section or type plus the ability to create or add new sections or types.

Columns 1. Switch to 2D Plan view. 2. Select Story 1 from the level control. 3. Click Columns from Toolbar. 4. Select New section definition. 5. Select a P 4 from the AISC 13th edition. 6. Click Add. Click Close. 7. If Beginning is not highlighted in green, click in the text box. 8. Click grid intersections to place columns. 9. Click Close. 10. Select new column. 11. Select from Menu: Edit > Edit > Move/Copy… 12. With Translation Vector highlighted in Green, click grid

intersection of column then adjacent grid intersection. 13. Verify Edit mode: Copy and Number of repetitions: 2 14. Click Execute. Click Close. 15. Window-select a column or group of columns. 16. Select Bars in Properties Browser. 17. Change Gamma to 45 degrees and click Enter or Tab.

Walls 18. Select Walls form Toolbar. 19. Select New Thickness definition. 20. Change Th: 10 inches. Verify Label automatically updated to TH10. 21. Click Add. Click Close. 22. Verify Drag is checked. 23. If Beginning is not highlighted in green, click in the text box. 24. Click grid start then subsequent grid intersections.


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25. Click Close. 26. Switch to 3D View workspace.

Additional activities: • Model columns and walls in 3D View • Explore and modify properties using window selection • Try other translational edit commands

Exercise 4—Model Beams, Floors, and Openings SE336-1L PROJECT_EX04.RTD

Modeling beams is straight-forward and builds on the columns and walls. Similar to the vertical elements, beams are bar elements and floors are panel elements. Openings are placed in floors and walls and can be any shape.

Beams 1. Switch to 2D Plan view and Story 1. 2. Click Beams from the Toolbar. 3. Select desired Section type and Section. 4. With Beginning highlighted in green, click the start and end points for the beams. 5. Toggle Drag for fewer clicks.

Floors 6. Click Floors from the Toolbar. 7. Select Thickness and Model as desired. 8. Expand Geometry and Parameters tabs. 9. Select Definition method: Contour. 10. Click desired points. Change between Line and Arc segments

as needed. 11. Click Apply. Click Close.

Openings 12. Click Openings from Toolbar. 13. Select Opening shape: Rectangle. 14. Change H= and B= to desired dimensions. 15. Select desired placement point. 16. Click location of opening in workspace. 17. Click Apply. Click Close.

Additional activities: • Try additional activities listed in Exercise 2 • Explore floor Model types: Shell, Deck-slab (one-way), etc. • Model Floors and Openings using different Definition methods: Rectangle, Circle, etc.

Exercise 5—Edit Properties SE336-1L PROJECT_EX05.RTD

Element properties affect the behavior of the element and structure during analysis and design. Properties are often adjusted while modeling and during the analysis and design process. Be aware that


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many of the design-related properties are dependent upon the Design Codes selected in the Job Preferences.

Releases 1. Change the interface layout to Structure Model > Properties 2. Select Releases from Toolbar. 3. Click Pinned-Pinned. 4. Click into Current Selection. 5. Select / Shift+select beams in workspace. 6. Click Apply. Click Close. 7. Open Display Properties. 8. Check Releases – symbols and Releases – codes. 9. Click Okay.

Member Types 10. Click Steel/Aluminum Member Type. 11. Double-click Beam. 12. Change Member type to Beam-Ky2. 13. Change Buckling length coefficient Y to 2.0. 14. Click Service. 15. Change Node displacements to L/300. 16. Click Okay. Click Save. Click Close. 17. Click into Lines/Bars and select beam to change. 18. Click Apply. Click Close. 19. Save.

Exercise 6—Stories SE336-1L PROJECT_EX06.RTD

There are some additional Story tools which facilitate modeling and review of the structure.

Copy Story 1. Switch to 3D View. 2. In Object Inspector, Right-click Story 2. 3. Select Stories > Copy Story… 4. Select Above, Height: 10.00 ft, and No. of repetitions: 3. 5. Click OK

Story Filters 6. Click Filter Structure Stories from main Toolbar. 7. Use drop-down box to toggle between stories. 8. Click Filter Structure Stories from main Toolbar to

turn off filtering. 9. Right-click Story 2 in Object Inspector > Select all… 10. Select Column on Story 2. 11. In Properties Browser, change Story to Story 1. 12. Turn on Story filters and toggle between Story 1 and 2 noting the column. 13. Change column back to Story 2. 14. Turn Story filters off.

Selections 15. Click Bar Selection from main Toolbar.


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16. Click W10X12 then click Arrow+Plus. 17. Click another section and Arrow+Plus. 18. Click W10X12 the click Arrow+Minus. 19. Change Attribute to Type. 20. Select RC Column then click Arrow+Plus. 21. Click Close. 22. Save.

Additional Activities: • From Object Inspector, explore Add stories… and Copy contents of the story… • Explore more Bar Selection methods

Exercise 7—Creating Load Cases, Loads and Load Combinations SE336-1L PROJECT_EX07.RTD

Loads represent the self-weight of the structure, the self-weight of the materials used to construct a building or other structure (mechanical systems and cladding), the transient loading (live loads), and all the environmental loads (wind, snow, earthquake). Load natures are the primary categories of these loads and depend on the Building Codes selected in Job Preferences. Load cases are groups of loads of a certain load nature. Load combinations are prescribed arrangements of Load Cases used for design.

Load Cases 1. Change the interface layout to Structure Model > Loads. 2. In Load Types dialog, change Label to SW and Name to Self Weight. 3. Press Add. 4. Change Label to DL1 and Name to Floor Dead Loads. 5. Change Nature to live, Label to LL1, and Name to Floor Live Loads. 6. Change Nature to Roof live, Label to LR1, and Name to Roof Live Loads.

Loads 7. Select DL1 from the list. 8. Click Load Definition from Toolbar. 9. Select Surface >Uniform planar load. 10. Input Z: -0.015 k/ft2 and Click Add. 11. Click into Apply to then select a Floor. 12. Click Apply. Click Close. 13. Repeat Load Definition for LL1 using Z: -0.08 k/ft2. 14. Toggle Load Cases in main toolbar. 15. Click into Loads Table cell PZ=-0.08. 16. Click F2 and change to -0.10.

Load Combinations 17. Click Combinations from Toolbar. 18. Leave defaults and click OK. 19. Click Factor definition to verify factors. 20. Click double-arrow to move all load cases to combination list. 21. Click Apply. Click Close. Note the change in the workspace. 22. From menu click Loads > Combination Table. 23. Click into Edit tab. 24. Select row of new combination and Click Delete. 25. Close dialog.


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26. Click Code Combinations from Toolbar. 27. Click Build button next to code selection Drop-down

box. 28. Observe Code Combination editor and close. 29. Select Manual combinations – generate. 30. Click More. 31. Select ULS and SLS and Click Next. 32. Note the ability to choose desired generated

combinations. 33. Click Back and Back. 34. Select Full automatic combinations. Click More. 35. Select ULS and SLS. Click Generate. 36. From menu click Loads > Combination Table. 37. Note that automatic combinations are NOT

generated until Calculations are performed.

Additional Activities: • Add Wind and Snow Load Cases and loading • Add Point and Line Loads

Exercise 8—Meshes SE336-1L PROJECT_EX08.RTD

RSA provides many options and tools for meshing panels (Floors and Walls) into finite elements. The level of refinement and customization of meshes differentiates RSA from other structural FEA applications.

Automatic Mesh Generation 1. Click Option of FE Mesh Generation from the main Toolbar. 2. Click Meshing Options. 3. Click Yes to “perform these operations for all panels.” 4. Select Automatic Mesh Generation with Division 1: 20. 5. Click Okay. 6. Click Generation of Calculation Model from Mesh toolbar. 7. Open Display options dialog. 8. Select Nodes > Hide Nodes. 9. Deselect Mark with colors > Stories – legend by colors. 10. Click Okay. 11. Review 2D Plan views and

return to 3D View.

Local Mesh Generation 12. Click Meshing Options. 13. Click Yes to “perform these operations for all panels.” 14. Select Simple mesh generation (Coons). 15. Select Element Size: 1.0 ft [0.3 m]. 16. Click Method parameters tab. 17. Select Squares in rectangular contour. 18. Click OK. 19. Click in the workspace to deselect all. 20. Select Floor 22 from Object Inspector. 21. Click Local mesh generation from Mesh toolbar.


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22. Click in the workspace to deselect all. 23. Review 2D Plan views and return to 3D View.

Complex Mesh Generation 24. Click Meshing Options. 25. Click Yes to “perform these operations for all panels.” 26. Select Complex mesh generation (Delaunay). 27. Select Element Size: 2 ft [0.6 m]. 28. Click Method parameters tab. 29. Deselect Regular mesh and Select Refinement (Delaunay +

Kang). 30. Click OK. 31. Click Generation of Calculation Model from Mesh toolbar. 32. Click in the workspace to deselect all. 33. Review Story 2 in 2D Plan view. 34. Emitters 35. Click Emitter Definition from Mesh toolbar. 36. Change H0 = 0.5 ft [0.10 m]. 37. Click into Coordinates textbox. 38. Click a node in the workspace. 39. Click Cancel. 40. Click Generation of Calculation Model from Mesh toolbar.

Additional Activities: • Review video and explore additional Mesh settings.

Analyze and Design Exercise 9—Analysis SE336-1L PROJECT_EX09.RTD

RSA provides many analysis methods and solvers such as static linear, nonlinear, P-delta, modal, time-history, and footfall. View and print calculation results using customizable data tables or graphical screen-captures.

Static Linear Analysis 1. Loads > Automatic Combinations... 2. Select Full automatic combinations 3. Click More > 4. Click Generate. 5. Click Calculations from the main Toolbar. 6. Select Analysis > Calculation Report > Simplified

Note 7. Review and close report.

Diagrams for Bars 8. Select ULS from the Cases pull-down box on the

main Toolbar. 9. Click Results > Diagrams for bars… 10. Click My Moment.


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11. Click Apply. 12. Turn off Sections and Finite Elements in the workspace display. 13. Click the Parameters tab in the Diagrams dialog box. 14. Select text, differentiated, and filled options. 15. Click Apply. 16. Click Screen Capture from the main Toolbar. 17. Leave default settings and click OK. 18. Select the NTM tab in the Dialog box. 19. Deselect My Moment and select Fz Force. 20. Click Apply. 21. Turn off Panel interiors in the workspace display. 22. Click Screen Capture from the main Toolbar. 23. Leave default settings and click OK. 24. Select the NTM tab in the Dialog box. 25. Deselect Fz Force. 26. Click Apply. 27. Close Diagrams dialog box. 28. Turn on Panel interiors in the workspace display.

Reactions 29. Click Results > Reactions. 30. Review values for Values, Envelope, and Global extremes tabs. 31. Click Screen Capture from the main Toolbar. 32. Leave default settings and click OK. 33. Close Reactions tables.

Maps 34. Click Analysis > Prepare Results… 35. Explore templates. 36. Click Run preparation for template1 37. Close Prepare Results dialog. 38. Select last Wnorm. > 12. 39. Right-click and select Preview. 40. Select the Scale tab in the Maps dialog. 41. Select 256 Colors and click Apply. 42. Right-click Wnorm. > 13 and select Preview. 43. Click Screen Capture from the main Toolbar. 44. Leave default settings and click OK. 45. Select With description setting in Maps dialog and click Apply. 46. Deselect With description setting in Maps dialog and click

Apply.

Animation 47. Select live load 1 from Cases pull-down on main Toolbar. 48. Select the Deformations tab in the Maps dialog Box. 49. Select Active and click Apply. 50. Type 22 and Enter in Bars combo-box on main Toolbar. 51. Click Open with new window with scale displayed on Maps dialog. 52. Click Apply. 53. Change Number of frames: 20 and Number of f.p.s.: 10 in Maps dialog. 54. Click Start. 55. Click Stop in Animation dialog box. 56. Click Exit button in workspace.


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57. Deselect Active and click Apply in Maps dialog box. 58. Select Detailed tab in Maps dialog box. 59. Deselect Displacements – u, w / z and click Apply. 60. Click Close.

Detailed Analysis 61. Turn on Sections in the workspace display. 62. Select beam 18 in workspace. 63. Select Results > Detailed Analysis… 64. Turn off Nodes in the workspace display. 65. Select ULS from Cases pull-down in main Toolbar. 66. Select Fx, Fz, and My and click Apply from Detailed Analysis dialog box. 67. Close Detailed Analysis dialog box. 68. Click Screen Capture from the main Toolbar. 69. Leave default settings and click OK. 70. Click the Exit button on the workspace.

Printout 71. Click Printout Composition. 72. Add Loads – Cases and Loads – Values from Standard tab. 73. Add all the Screen Captures. 74. Click the Preview of selected components button. 75. Close Preview. 76. Close Printout Composition dialog box.

Additional Activities: • Explore additional Results tables and display settings. • Add modal and other analysis types (advanced). • Explore Printout Composition settings.

Exercise 10—Steel Design SE336-1L PROJECT_EX10.RTD

Robot verifies the capacity of structural steel elements individually or within groups. Additionally, Robot performs design code checks for groups of elements with various optimization parameters. The Steel/Aluminum Design interface layout is ideal for the steel design process.

Member Verification 1. Select the Display options and check Bars > Section – names. Click OK. 2. Click Calculations from the main Toolbar. 3. Select Member verification from the Calculations

dialog box. 4. Click Bar Selection from the main Toolbar. 5. Select Attrib. > Type > Beam and add to the Bar list. 6. Click Close. All the beams should be selected in the

workspace. 7. Copy the Bar number ( 4to35 ) from the main toolbar. 8. Paste into Member verification text box. 9. Select Limit States: Ultimate and Serviceability 10. Click Calculations. 11. Review the results output table. Note that the

controlling case is number 9: ULS for all members.


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12. Click Analysis from the output dialog box. 13. Review the Analysis chart and Close. 14. Click Map. 15. Review the capacity Map. 16. Change to case 9: ULS from the main Toolbar. 17. Close the Map. 18. Click on one of the beam results in the output dialog box. 19. Review information on results dialog. 20. Click Calc. Note, review, and Close. 21. Click OK to exit individual results. 22. Close results dialog box. 23. Click Cancel for results Archiving.

Code Group Verification 24. Select the Groups tab on the Definitions dialog box. 25. Click New. 26. Select beams 7 26to29 and copy to Member List. 27. Change Name to Roof Beams 1 28. Select Material: STEEL A992-50 A992 Grade Fy 50 ksi 29. Click Sections. 30. Click the check box for AISC 13th. 31. Click the check box for W. Notice all W shapes are added to Selected Sections box. 32. Click Delete All. 33. Deselect W. 34. Select AISC 13th and W – DO NOT click check boxes. 35. Select in the following order: W12x58, W12x14, W12x16 to W12x30. 36. Click OK. 37. Click Save. 38. Click Code group verification from Calculations dialog. 39. Click List and select Roof Beams 1. 40. Notice Limit States only allows ULS or SLS – not both. 41. Click Calculations. 42. Review results dialog. Note the Group presents the worst case only. 43. Close results dialog and Cancel archiving. 44. Code Group Design 45. Select Code group design. 46. Type 1 into the adjacent text box. 47. Click Calculations. 48. Review the results. Note that design iterates through the list and finds the first section that works:

W12x58. Note that the Ratio for the next section, W12x14 is over 4.0 – No Good. 49. Close results dialog and Cancel archiving.

Optimization 50. Click Optimization. 51. Click Options. 52. Click Weight and OK. 53. Click Calculations. 54. Note the optimum section is now a W12x26. Optimization sorts the Section list by the

Optimization options – weight in this instance. 55. Click Change All. 56. Close results dialog and Cancel archiving. 57. Note that each beam in Group 1 is now a W12x26. 58. Click Calculations from main Toolbar.


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59. Perform Member verification for bars 7 26to29 – those in Group 1. 60. Perform Code Group design optimization again to verify W12x26 is still optimum section.

Additional Activities: • Add more Code Groups for other roof beams and columns. • Adjust Sections available for Code Group design. • Adjust Optimization Options for flange width and depth. • Review design calculation Configuration options.

Exercise 11—RC Member Reinforcement SE336-1L PROJECT_EX11.RTD

There are two primary options for analysis and design of concrete reinforcement: assessing required reinforcement and interactive design of provide reinforcement. Evaluation of required reinforcement is an effective way to quickly get results for several members at one. Designing provided reinforcement allows designers a variety of customization options for design down to a single bar, if desired.

Required Reinforcement 1. Click Calculations from the main Toolbar. 2. Select RC Design > RC Members – required reinf. 3. Using the Bar selection, select Attrib. > Type > RC

column. 4. Click RC member calculation parameters from the side

Toolbar. 5. Double-click Columns and review parameters. 6. Click Close. 7. Click Apply. 8. Using the Bar selection, select Attrib. > Type > RC

beam. 9. Click RC member calculation parameters from the side

Toolbar. 10. Click Close. 11. Click Apply. 12. Select the ULS Code Combinations. 13. Click Calculate. 14. Review Beam and Column results.

Provided Reinforcement 15. Select RC Design > RC Members – Provided reinforcement. 16. Select Structure tab in workspace. 17. Select column 14. 18. Click RC Column

Design from side Toolbar.

19. Click OK in Parameters dialog.

20. Click Calculation options.

21. Review General and Concrete tabs.

22. Select RC Column template from pull-down in Longitudinal reinf. Tab. 23. Click the #6 check-box.


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24. Click Save As … RC Column 2. 25. Review Transverse reinf. 26. Click OK. 27. Click Loads definition from side Toolbar. 28. Review imported loads. 29. Click Start calculations from main Toolbar. 30. Click Calculate. 31. Click Column – Interaction N-M and review. 32. Click Column – Reinforcement tab. 33. Change #6 bars to #9. 34. Graphically select #9 bars. 35. Select Detailed tab. 36. Select four of the #9 bars and Delete. 37. Robot automatically verified the provided reinforcement. Note the calculation error. 38. Click Start calculations. 39. Select NO to design reinforcement. 40. Click Column Drawings from side Toolbar and Review. 41. Click Reinforcement button from side Toolbar.

Additional activities: • Design other columns and beams • Explore the other reinforcement parameters

Exercise 12—Conceptual Form Simulation SE336-1L PROJECT_EX12.RVT

The Conceptual Form Simulation Extension in Autodesk Revit Structure provides design engineers a means to study a complex conceptual form. It is meant to help the engineer understand deflections and stress of a form (form-finding) rather than design framing. This Add-in is part of the Revit Extensions for Revit Structure available to Subscription customers. Robot Structural Analysis Professional is not required. The Add-in will analyze a Conceptual Mass object placed in a Revit project. A Divided Surface with a Rectangular (not _No Pattern) is required.

Conceptual Form Simulation 1. Click Add-ins > Extensions Manager. 2. Double-click Simulation > Conceptual

Form Simulation. 3. Review the Geometry information. 4. Click Supports > Add Pin Support. 5. Add eight supports (four each side)

approximately equidistant. 6. Click Cases and Combinations 7. Verify Automatic Wind Load is Checked. 8. Provide a Value: 0.01 and click Add. 9. Click Loads > Planar Loads. 10. Select the various cases for graphical

review. 11. Click Calculations. 12. Check Deformation. 13. Click Calculate. 14. Review the various load cases and

results types.


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15. Select Case: W2+ and Result type: Uy. 16. Click View > Animate. 17. Click Stop. 18. Click Report to view reporting options. 19. Click OK to exit the Extension.

Exercise 13—Composite Design & Vibration Analysis SE336-1L PROJECT_EX13.RVT

The Composite Design and Vibration Analysis Extensions in Autodesk Revit Structure allow design engineers to design steel floor framing without leaving the Revit environment. Like Conceptual Form Simulation, Robot Structural Analysis is not required to run these tools. (Note: Robot Structural Analysis IS required for the 2010 version—not the 2011 version.)

Composite Design 1. In the Level 2 Structural Plan,

window-select all the floor framing. 2. Click Add-ins > Extensions Manager. 3. Double-click Robot Structural

Analysis > Composite Design. 4. Click Edit > Composite Settings to

review (or modify settings). 5. Click OK. 6. Click Design > Design All. 7. After reviewing results, click OK to

update Revit model with new design information.

Vibration Analysis 8. Select only the Floor slab on Level 2. 9. Click Add-ins > Extensions Manager. 10. Double-click Robot Structural

Analysis > Floor Vibrations Analyzer. 11. Hover over each bay to see

information and Natural Frequencies. 12. Click Analysis and Check Walking Excitation. 13. Click Floor Plan and review the results. 14. Select Occupancy: Indoor (Modular) and

review results. 15. Select Occupancy: Indoor (partitioned) and

review results. 16. Click Close.

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