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Problem P - Critical Buckling Load

Tham khảo tài liệu 'problem p - critical buckling load', kỹ thuật - công nghệ, kiến trúc - xây dựng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Problem P Critical Buckling Load Steel E 29000 ksi Poissons Ratio 0.3 To Do Use P-Delta option and iteration to determine the critical buckling load for this built-up column. Hint PCRitical is between 15 480 and 15 490 kips. P rCR 7777 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 P Solution 1. Click the drop down box in the status bar to change the units to kip-ft. Kip-ft 30 2. From the File menu select New Model. This displays the Coordinate System Definition dialog box. 3. In this dialog box Select the Cartesian Tab. Type 0 in the X Direction Number of Grid Spaces edit box. Type 0 in the Y Direction Number of Grid Spaces edit box. Type 1 in the Z Direction Number of Grid Spaces edit box. Type 12 in the Z Direction Grid Spacing edit box. Click the OK button. 4. Click the Quick Draw Frame Element button on the side toolbar. 5. Click once on the grid line in the 3-D View window to draw the frame element. 6. Click the Pointer button on the side tool bar to exit draw mode and enter select mode. 7. Click on the bottom joint in the 3-D View window to select it. 8. From the Assign menu choose Joint and then Restraints. from the submenu. This will display the Joint Restraints dialog box. 9. In this dialog box Click the fixed base fast restraint button U3 R1 R2 and R3 as restrained. X. to set all degrees of freedom U1 U2 Click the OK button. 10. Click the drop down box in the status bar to change the units to kip-in. Kip-in 30 11. From the Define menu select Materials. to display the Define Materials dialog box. Highlight the STEEL material and click the Modify Show Material button to display the Material Property Data dialog box. 12. In this dialog box 2 Verify that the modulus of elasticity is 29000 and poisson s ratio is 0.3. Click the OK button twice to exit the dialog .