Question

An isolated concrete pavement slab of length L is resting on a frictionless base. The temperature of the top and bottom fibre of the slab are $T_t$ and $T_b$ respectively. Given the coefficient of thermal expansion = $\alpha$ and the elastic modulus = E. Assuming $T_t>T_b$ and the unit weight of concrete as zero, the maximum thermal stress is calculated as

• A. $L\alpha (T_t-T_b)$
• B. $\text{zero}$
• C. $E\alpha (T_t-T_b)$
• D. $\frac{E\alpha (T_t-T_b)}{2}$

Answer 1

The correct option is B $\text{zero}$

zero since it's frictionless