Question

The value of τb in the nominal shear strength equation according to simple post-critical method is given by

(a) fyw / √ λw

(b) fyw/λw

(c) fyw/λw²

(d) fyw/(√3 λw²)

The question was asked in final exam.

The doubt is from Web Panel Subjected to Shear in section Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures

Answer 1

Correct answer is (d) fyw/(√3 λw²)

The explanation is: The value of τb in the nominal shear strength equation according to simple post-critical method is given by τb = fyw/√3 for λw ≤0.8, [1-0.8(λw -0.8)](fyw/√3) for 0.8 < λw<1.2, fyw/(√3 λw²) for λw ≥1.2, where fyw is yield strength of web, λw is non-dimensional web slenderness ratio for shear buckling stress.