In a section, shear centre is a point through which, if the resultant load passes, the section will not be subjected to any i. Torsion ii. Bending iii. Tension iv. Compression
- AOnly (i)Correct
- BOnly (i) and (ii)
- COnly (ii) and (iii)
- D(i), (ii), (iii) and (iv)
Solution
Concept
Definition and fundamental property of shear centre
Formula
NONE
Step-by-step solution
1. The shear centre is the point in a cross-section where transverse loads produce twisting or torsion-free bending. 2. Applying loads through the shear centre prevents torsional deformation of the section. Answer: A
Explanation
The shear centre is the specific point in a beam section through which transverse loads must act to produce pure bending without twisting. If the load passes through this point, the section experiences zero torsional stress. Therefore, option A is the correct choice.
Why the other options are wrong
B) Option B includes bending, which does occur when loads act through the shear centre. D) Passing through the shear centre specifically prevents twisting rather than eliminating all axial and flexural effects.
Shortcut
Shear Centre is the point where transverse load causes Bending without Torsion.
Common mistake
Assuming that loading through the shear centre prevents bending or normal stresses rather than specifically preventing torsion.
Correct answer: A) Only (i)