Question

When a two-hinged parabolic arch is subjected to a rise in ambient temperature, the horizontal thrust at the support will

• A. Remain same
• B. Increase or decrease depending on the span
• C. Increase
• D. Decrease

Answer 1

The correct option is C Increase

General exteriors for horizontal thrust in 2-hinged parabolic arches is

$A=\frac{\int \frac{M_{x}ydx}{EI}+\alpha tl}{\int \frac{y^{2}dx}{E{I}_C}+\frac{l}{AE}+k}$

$\text{if}\alpha \text{increases, H increases}$