As per IS 456 : 2000, Which of the following type of torsion is c
A. Compatibility Torsion
B. Equilibrium Torsion
C. Both (a) and (b)
D. None of the above
Please scroll down to see the correct answer and solution guide.
Right Answer is: B
SOLUTION
Concept:
Torsional moment exist along with bending moment as well as shear force, axial force and generally shear stresses are induced in the beam due to torsion.
Equilibrium torsion:- The torsion induced in an RCC member due to eccentric loading with respect to the center is called equilibrium torsion.
Equilibrium Torsion in beam 2 due to load P shown above.
Compatibility Torsion: This type of torsion is induced due to the need of the member to undergo a certain angle of twist to maintain the compatibility conditions. The twisting moment developed is statically indeterminate.
Compatibility Torsion/ Secondary Torsion/ Statically Indeterminate Torsion in 2 and 3 due to load P shown above.
Explanation:
If torsional stiffness of member is neglected the member is designed for bending moment only and shear force is assumed to cater for compatibility torsion.
Thus the design is done only for equilibrium torsion.
