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Slenderness ratio when ends are assumed to be fixed for a plate girder is(a) 2.45 d(b) 8.5 d/t(c) 2.45 d/t(d) 8.5 tThe question was asked in final exam.My question comes from Web Buckling & Crippling topic in portion Design of Beams of Design of Steel Structures |
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Answer» CORRECT choice is (C) 2.45 d/t The explanation: When ends are assumed to be fixed, effective length = d√2/2 = d/√2, minimum radius of gyration = t/√12. Therefore slenderness RATIO = (d/√2)/( t/√12) = 2.45d/t, where d = depth of web, t = thickness of web. |
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