Question

A square slab 4 m x 4 mis isotropically reinforced at the bottom. If it is subjected to a working load of 12 kPa (including self weight), the moment capacity required as per yield line theory is

• A. 6 kN-m/m
• B. 8 kN-m/m
• C. 10kN-m/m
• D. 12kN-m/m

Answer 1

The correct option is D 12kN-m/m

$Ultimateload\left(w_u\right)=1.5\times 12=18kPa$

$Momentcapacity=\frac{w_u{L}^2}{24}=\frac{18\times 4^2}{24}=12kN-m/m$