Question

Shear strength of bolt is given by ____

(a) fu(nnAnb+ nsAsb)/(√3 x 1.1)

(b) fy(nnAnb+ nsAsb)/(√3 x 1.1)

(c) fu(nnAnb+ nsAsb)/(√3 x 1.25)

(d) fy(nnAnb+ nsAsb)/(√3 x 1.25)

I had been asked this question in an interview.

Question is taken from Bolted Connections in division Bolted Connections of Design of Steel Structures

Answer 1

The correct choice is (c) fu(nnAnb+ nsAsb)/(√3 x 1.25)

Explanation: Shear strength of bolt = fu(nnAnb+ nsAsb)/(√3 x 1.25), where fu=ultimate strength of bolt, nn=number of shear planes with thread intercepting shear plane, ns=number of shear planes without thread intercepting shear plane, Anb=nominal plain shank area of bolt, Asb=net shear area of bolt at threads.