In stability analysis, the term mobilized shear strength is referred to as
- AShear Strength
- BMaximum shear stress
- CApplied shear stressCorrect
- DNone of the above
Solution
Concept
Definition of mobilized shear strength in soils
Formula
NONE
Step-by-step solution
1. Shear strength is the maximum resistance soil can offer against shear deformation. 2. Mobilized shear strength is the shear stress developed along a potential failure surface due to applied external loads. 3. Thus, in stability analysis, mobilized shear strength refers to the applied shear stress. Answer: C
Explanation
Mobilized shear strength represents the actual shear stress developed or applied along a potential failure plane in a soil mass to maintain static equilibrium under applied loads. It indicates the fraction of the soil's maximum available shear strength currently being exerted to resist sliding. Therefore, in stability analysis, mobilized shear strength corresponds directly to the applied shear stress.
Why the other options are wrong
A) Shear strength is the maximum resistance the soil can offer, whereas mobilized shear strength is the developed stress under load. B) Maximum shear stress refers to peak strength available, not the stress currently mobilized. D) Option C is correct as mobilized shear strength equals applied shear stress.
Shortcut
Mobilized shear strength is the Applied shear stress acting on the soil mass.
Common mistake
Confusing mobilized shear strength (the applied shear stress) with the maximum available ultimate shear strength.
Correct answer: C) Applied shear stress