Q4 A A Steel Column That Is Fixed At The Base And Free At The Top Is Constructed Of A Wide Flange Section See Figure Q 1 (48.7 KiB) Viewed 33 times
Q4 A A Steel Column That Is Fixed At The Base And Free At The Top Is Constructed Of A Wide Flange Section See Figure Q 2 (32.47 KiB) Viewed 33 times
Q4(a) A steel column that is fixed at the base and free at the top is constructed of a wide-flange section (See Figure Q4). The column height is L = 3 m. The yield stress is oy = 250 MPa and the modulus of elasticity is E = 200 GPa for the steel column. (a) Due to the design need, the compressive force P acting at the top of the column has an eccentricity e = 60 mm. Determine what is the maximum allowable load Pallow? (12 marks) (b) If the compressive force P is applied without any eccentricity, determine the maximum allowable concentric load. Comment on the effect of eccentricity based on the comparison of two load capacities. (5 marks) Hint: The secant formula for a column subjected to an eccentric compressive load is P LP 0 1+ L = KL A 2r V EA ec sed max
o the 205mm ==== 9.4mm A A 310mm L Het 16.3mm Section A-A Figure Q4
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