Success with ModelSmart3D Pre-Engineering Software Corporation Written by: Robert A. Wolf III, P.E. Copyright 2001, Pre-Engineering Software Corporation, All Rights Reserved Show 2

Success with ModelSmart3D - Part IV Slide No. 2 Series Outline Show # 1 I.Possible benefits II.Introduction to bridge trusses III.Modeling for structural analysis Show # 2 IV.Using ModelSmart3D V.Extra for Experts Show # 3 VI.Optimization VII.Printing Show # 4 VIII.Building Your Model

Success with ModelSmart3D - Part IV Slide No. 3 IV. Using ModelSmart3D

Success with ModelSmart3D - Part IV Slide No. 4 3D Modeling Symbols & Coordinate System Joints (Nodes) 3D Members Load Vectors ( in x,y, and z directions) 3D Supports Examples Y X 3D Cartesian coordinate system (x,y,z) Z

Success with ModelSmart3D - Part IV Slide No. 5 Definitions

Success with ModelSmart3D - Part IV Slide No. 6 Entering Data into ModelSmart3D 1.Setup the WorkSpace 2.Input the main truss from the 2D sketch. 3.Duplicate the main truss. 4.Connect the trusses. 5.Add extra bracing for lateral stiffness.

Success with ModelSmart3D - Part IV Slide No. 7 Starting ModelSmart3D Y X Z YZ Guide Plane XZ Guide Plane XY Guide Plane

Success with ModelSmart3D - Part IV Slide No. 8 Set WorkSpace Size

Success with ModelSmart3D - Part IV Slide No. 9 Re-Center WorkSpace

Success with ModelSmart3D - Part IV Slide No. 10 Adjust the View

Success with ModelSmart3D - Part IV Slide No. 11 Add the First Joint Add Joint

Success with ModelSmart3D - Part IV Slide No. 12 Move Origin to First Joint

Success with ModelSmart3D - Part IV Slide No. 13 Add Joints Along the Bottom Chord of the Main Truss

Success with ModelSmart3D - Part IV Slide No. 14 Delete XZ GuidePlane, Show and Move the XY GuidePlane

Success with ModelSmart3D - Part IV Slide No. 15 Moved XY GuidePlane

Success with ModelSmart3D - Part IV Slide No. 16 Using “Set Focus” Set Focus

Success with ModelSmart3D - Part IV Slide No. 17 Finish the Joints in the Main Truss

Success with ModelSmart3D - Part IV Slide No. 18 Add Your First Member Add Member

Success with ModelSmart3D - Part IV Slide No. 19 Add Members Joint to Joint

Success with ModelSmart3D - Part IV Slide No. 20 Main Truss Finished Place one Joint on the Other Truss

Success with ModelSmart3D - Part IV Slide No. 21 Main Truss Finished Add One Joint to Other Truss Select Joint

Success with ModelSmart3D - Part IV Slide No. 22 Get Ready to Replicate Joints

Success with ModelSmart3D - Part IV Slide No. 23 Replicate Joints to the other Truss

Success with ModelSmart3D - Part IV Slide No. 24 Add Members to Truss 2

Success with ModelSmart3D - Part IV Slide No. 25 Connect the Trusses

Success with ModelSmart3D - Part IV Slide No. 26 Add Supports

Success with ModelSmart3D - Part IV Slide No. 27 Add Loads

Success with ModelSmart3D - Part IV Slide No. 28 Save Your Model

Success with ModelSmart3D - Part IV Slide No. 29 Let’s Test it!

Success with ModelSmart3D - Part IV Slide No. 30 External Forces (Loads) Create Internal (Member) Forces

Success with ModelSmart3D - Part IV Slide No. 31 How Members Fail Pulling apart Buckling Crushing Tension Failure Compression Failures

Success with ModelSmart3D - Part IV Slide No. 32 The Design Equation Actual Force Ultimate Force Actual Force – Force created in the member caused by the applied load Ultimate Force – The maximum force the member can withstand

Success with ModelSmart3D - Part IV Slide No. 33 Member Results

Success with ModelSmart3D - Part IV Slide No. 34 Let’s Fix the Bridge

Success with ModelSmart3D - Part IV Slide No. 35 Change Member Shapes

Success with ModelSmart3D - Part IV Slide No. 36 It Worked!!!

Success with ModelSmart3D - Part IV Slide No. 37 Add Some Lateral Load

Success with ModelSmart3D - Part IV Slide No. 38 It Worked!

Success with ModelSmart3D - Part IV Slide No. 39 Extra Lateral Bracing

Success with ModelSmart3D - Part IV Slide No. 40 Designing for “The Load Block” How does the load applied to the load block get into the structure?

Success with ModelSmart3D - Part IV Slide No. 41 Load Block Forces on Members Use concentrated loads where the effected members touch the edges of the load block.

Success with ModelSmart3D - Part IV Slide No. 42 Where to Apply Load Block Forces

Success with ModelSmart3D - Part IV Slide No. 43 Bearing is Better

Success with ModelSmart3D - Part IV Slide No. 44 Reinforce Tension Joints Wood Gussets Hat Buckram Tension Reinforcement

Success with ModelSmart3D - Part IV Slide No. 45 Important Considerations & Summary 1.Analyze structure with some lateral load and provide lateral support. 2.Provide some miscellaneous bracing. 3.Provide special reinforcement at load application points. 4.Reinforce tension connections. 5.Do not put extra joints in members.

Success with ModelSmart3D - Part V Slide No. 46 V. Extra for Experts Effective Length Member “A” Curve “A” Member “B” Curve “B”

Success with ModelSmart3D - Part IV Slide No. 47 User Defined Effective Lengths

Success with ModelSmart3D - Part IV Slide No. 48 Could we brace to the joint on the other truss?

Success with ModelSmart3D - Part IV Slide No. 49 You must create a horizontal truss.

Success with ModelSmart3D - Part IV Slide No. 50 It Worked!

Success with ModelSmart3D - Part IV Slide No. 51 Portal Frame

Success with ModelSmart3D - Part IV Slide No. 52 End of Show 2