Question

The shape of the influence line diagram for horizontal thrust in a symmetrical three-hinged parabolic arch is

• A. Rectangular
• B. Parabolic
• C. Triangular
• D. Trapezoidal

Hint:

- Influence line diagrams take the same shape as the structural curve for arches.

Answer 1

The Correct Option is B

Step 1: Understanding influence lines. - In three-hinged parabolic arches, the horizontal thrust influence line follows the same curvature as the arch geometry. Step 2: Selecting the correct shape. - Since the given structure is parabolic, the influence line diagram is also parabolic. Thus, the correct answer is (B) Parabolic.