Question

For maximum vertical stress, the shear stress is _________ if the load is 20 kN and r=2m.

(a) 0.4356 kN/m^2

(b) 0.244 kN/m^2

(c) 0.1518 kN/m^2

(d) 0.3625 kN/m^2

This question was posed to me in final exam.

This interesting question is from Stress Distribution topic in division Stress Distribution of Geotechnical Engineering I

Answer 1

The correct answer is (d) 0.3625 kN/m^2

To explain I would say: Given,

r=2m

Q=20 kN

\(τ_{rz}=\frac{0.0725Q}{r^2} \)

\(τ_{rz}=\frac{0.0725*20}{2^2} \)

∴ τrz=0.3625 kN/m^2.