QUESTION $4$

Using virtual work method, analyze and design a $250$ mm thick reinforced concrete slab, the slab occupies a corner bay of a floor as shown in fig $4,$ which has columns at each corner connected by stiff beams in each direction. The slab can be regarded as being continuous over $2$ adjacent sides and simply supported over the other $2$ sides. Assume isotropic reinforcement which equals m in each direction and allow for ultimate load of $30k\frac{n}{m}$

$[25$ Marks$]$