The horizontal beam ABC, as shown, is supported by column BD, and CE. The beam is prevented from moving horizontally by a pin support at end A. Each column is pinned at its upper end to the beam, but at the lower ends, support D is a guided support while E is pinned. Both columns are solid steel bars (E = 30 x 106 psi) of square cross section with width equal to 0.625 inch. Cite the critical buckling load for either column BD or CE?
23) The horizontal beam ABC, as shown, is supported by column BD, and CE. The beam is prevented from moving horizontally by a pin support at end A. Each column is pinned at its upper end to the beam, but at the lower ends, support D is a guided support while E is pinned. Both columns are solid steel bars (E = 30 x 106 psi) of square cross section with width equal to 0.625 inch. Cite the critical buckling load for either column BD or CE? (Hint: Take k for BD = 2.0)
Express answer in pounds (lbs), up to 1 decimal place. Example: 100.2, 200.0.
24) The horizontal beam ABC, as shown, is supported by column BD, and CE. The beam is prevented from moving horizontally by a pin support at end A. Each column is pinned at its upper end to the beam, but at the lower ends, support D is a guided support while E is pinned. Both columns are solid steel bars (E = 30 x 106 psi) of square cross section with width equal to 0.625 inch. A load Q acts at a distance ‘a’ from column BD. If ‘a’ = 21 inches, what is the critical value Q? Hint: critical Q is the load that will cause the two columns to buckle.
Express answer in pounds, up to 1 decimal place.
25) The horizontal beam ABC, as shown, is supported by column BD, and CE. The beam is prevented from moving horizontally by a pin support at end A. Each column is pinned at its upper end to the beam, but at the lower ends, support D is a guided support while E is pinned. Both columns are solid steel bars (E = 30 x 106 psi) of square cross section with width equal to 0.625 inch. A load Q acts at a distance ‘a’ from column BD. If ‘a’ can be varied from 0 to 40 inches, what is the maximum possible value of QCR (critical Q)?
Express answer in pounds, up to 1 decimal place.
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