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Problem U - Barrel Vaulted Structure

Determine the maximum deflection at the center of upper and lower barrel vaults due to the self weight of the structure. Also determine the maximum deflection at center of upper and lower barrel vaults due to the self weight plus the prescribed live load applied to the top barrel vault | Problem U Barrel Vaulted Structure Concrete E 3600 ksi Poissons Ratio 0.2 12 thick concrete walls and slabs To Do Determine the maximum deflection at the center of upper and lower barrel vaults due to the self weight of the structure. Also determine the maximum deflection at center of upper and lower barrel vaults due to the self weight plus the prescribed live load applied to the top barrel vault. Live Load 300 psf downward Barrel vault with 30 radius and 35 roll down angle AT 1 Barrel vault with 20 radius and 35 roll down angle Note Our intent is that you try this problem on your own first. After you have solved it on your own you can step through our solution if desired. If you have problems trying to create the model then follow the steps in our solution. 1 Problem U Solution 1. Click the drop down box in the status bar to change the units to kip-ft. Kip-ft 30 2. 3. 4. From the File menu select New Model From Template. This displays the Model button to display the Barrel Accept the default Number of Circumferential Spaces 8 Accept the default Number of Span Spaces 8 Type 40 in the Span edit box Type 20 in the Radius edit box Type 35 in the Roll Down Angle edit box Uncheck the Restraints check box Click the OK button. 5. Click in the 3-D View window to make sure it is active. The window is highlighted when it is active. 6. Click the Select All button g located on the side toolbar to select the entire structure. 7. From the Edit menu select Move. to display the Move Selected Points dialog box. 8. In this dialog box Type 10 in the Delta Z edit box. Click the OK button. 9. From the Edit menu select Add To Model From Template. to display the Model button to display the Barrel 2 Accept the default Number of Circumferential Spaces 8. Accept the default Number of Span Spaces 8. Type 40 in the Span edit box. Type 30 in the Radius edit box. Type 35 in the Roll Down Angle edit box. Uncheck the Restraints check box if it is not already unchecked. Click the Advanced button.