vacita integrated services simply supported beam
DESCRIPTION
simply supported beam designTRANSCRIPT
VACITA INTEGRATED SERVICES
ANALYSIS OF A SIMPLY SUPPORTED BEAM
USING
STAAD PRO
NWOSU AUGUSTINE
April 2015
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This training manual is intended for beginners, this exercise will work the trainee through the basic features of STAAD Pro: Modeling, Loading, Assigning supports, Analysis and Post processing.
A verification exercise is done at the end of the analysis using STAAD Pro. to compare the result with a traditional manual calculation
At the end of this module the trainee would have basic knowledge of
• Modeling of simple beam. • Loading of uniformly distributed beam. • Assigning different types of support. • Interpreting the result from the analysis.
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ANALYSIS OF A SIMPLY SUPPORTED BEAM.
MODELING 1. Launch the STAAD icon by double clicking on the icon.
1. For STAAD V8i click on new project →space → Next →Add beam.
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2. Close the Snap node/beam dialogue box.
3. Let the origin be x=0,y=0,z=0.
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4. Type in x=5m
5. Click on the screen. Select the Add beams cursor and join the 2 nodes.
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ASSIGNING PROPERTIES 1. Click on General → Property →Define
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2. In the Property page, click on Rectangle, type in 0.45 for YD and 0.23 for ZD and Add, then close the dialogue box.
3. Use cursor to assign the property (click on Assign → take your cursor inside the model space and click on the beam)
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ASSIGNING SUPPORTS
1. Click on Support in the page control tab.
2. On the data page → Create support → Pinned → Add.
3. Click on created support (Support 2) and assign the supports using Use Cursor To Assign.
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LOADING
1. Click on Load & Definition
2. Click on Load Cases Details on the data page → Add.
3. In the title tab change the Load Case 1 to self weight → Add.
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4. Change Load Case 2 to live load → Add.
5. Close the dialogue box. 6. Highlight the self weight on the data page → click on Add.
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7. Click on Add again to calculate the self weight of the structure → Close. 8. Highlight the live load → Add → Member load →Uniform force → type in ‐5 in the
Uniform Force data section → Add → Close.
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9. Highlight the SELFWEIGHT and Assign to view.
10. Highlight the live load, UNI GY ‐5kN/m and Use Cursor to Assign.
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11. Click on Load Case Details and Add again to combine the loads.
12. Click on Define Combinations For Load Case 1 use a factor of 1.4 For Load Case 2 use a factor of 1.6
13. Close.
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ANALYSIS
1. Click on Analysis/Print → Static Check → Add → Close.
2. Click on Analyze → Run Analysis → Save
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3. Click on the second radio button (Go to Post Processing Mode) →Done.
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POST‐PROCESSING
1. Select only load case 3→ok. Note: this will give the maximum moment.
2. Click on the reaction to see the values of your support reaction (28.535kN)
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3. To view the bending moment and shear force diagrams click on Beam → Graphs.
VERIFICATION OF STAAD RESULT
1. MAXIMUM BENDING MOMENT. M=wl2/8 Self weight of beam per meter= 0.45x0.23x23.5616=2.438kN/m Total moment =(( 2.438x52)/8 )1.4 +( (5x52)/8)1.6 = 35.668kN.m Compare with STAAD result.
2. SHEAR FORCE. Total self weight =(2.438x5)1.4 = 17.066kN Total live load = (5x5)1.6 = 40kN Total load = 17.066+40 = 57.066kN Load at each support = 57.066/2 = 28.533kN. Compare with STAAD result.
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ASSIGNMENT.
Analyze the member in STAAD Pro and extract the following from the Analysis.
1) Maximum bending moment = …………kN.m
2) Support reaction = ………..kN
3) Draw the bending moment diagram ignoring the self weight of the member.
4) Draw the shear force diagram ignoring the self weight of the member.
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