Question

The crippling strength of web at interior point where concentrated load is acting is given by

(a) Fcrip = (b+2n1)fyw

(b) Fcrip = (b+2n1) t

(c) Fcrip = (b+2n1)fywt

(d) Fcrip = (b+n1)/fywt

The question was posed to me in an international level competition.

Question is taken from Web Buckling & Crippling in portion Design of Beams of Design of Steel Structures

Answer 1

The correct option is (c) Fcrip = (b+2n1)fywt

To explain I would say: The crippling strength of web at interior point where concentrated load is acting is given by Fcrip = (b+2n1)fywt, where b+2n1 is length obtained by dispersion through flange, t is thickness of web, fyw is design yield strength of web.