Question

Directions: The following items consists of two statements; one labelled as 'Assertion (A)' and the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:

Codes:
(a) both A and R are true and R is the correct explanation of A
(b) both A ·and Rare true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true

Assertion (A): Minimum shear reinforcement as stirrups must be provided in beams, even if the shear stress ${\tau }_v$ is less than the shear strength of concrete ${\tau }_c$.

Reason (R) : The bending of beams creates a tendency in the particles to slide upon each other with the beam. This tendency is called shear.

• A. both A and R are true and R is the correct explanation of A
• B. both A and Rare true but R is not a correct explanation of A
• C. A is true but R is false
• D. A is false but R is true

Answer 1

The correct option is B both A and Rare true but R is not a correct explanation of A

${\tau }_v<0.5{\tau }_c\to$ No shear reinforcement to be provided.

When $0.5{\tau }_c<{\tau }_v<{\tau }_c\to$ Minimum shear reinforcement.

${\tau }_c<{\tau }_v<{\tau }_{c,max}\to$ design of shear reinforcement

${\tau }_v<{\tau }_{c,max}\to$ max redesign the section