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Web buckling strength at support of simply supported plate girder is given by

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Web buckling strength at support of simply supported plate girder is given by

(a) Fwb =Btwfcd

(b) Fwb =twfcd

(c) Fwb =Btw

(d) Fwb =Bfcd

I got this question in class test.

I would like to ask this question from Web Buckling & Crippling topic in division Design of Beams of Design of Steel Structures

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The correct option is (a) Fwb =Btwfcd

To elaborate: Web buckling strength at support of simply supported plate girder is given by Fwb =Btwfcd , where B is length of stiff portion of bearing plus additional length given by dispersion at 45˚to the level of neutral axis, tw is thickness of web, fcd is allowable compressive stress corresponding to assumed web strut according to buckling curve c.

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