Question

In a beam of length L, four possible influence line diagram for shear at a section located at a distance of L/4 from the left support marked (P, Q, R, S) are shown below. The correct, ILD is....
(P)

(Q)





(R)




(S)

• A. R
• B. S
• C. Q
• D. P

Answer 1

The correct option is D P





$\frac{x}{L/4}=\frac{y}{3L/4}$
$\Rightarrow$ x = $\frac{y}{3}$
also x + y = 1
$\Rightarrow$ $y+\frac{y}{3}=1$

$\Rightarrow$ $\frac{4y}{3}=1$