Problem $2$

By using the yield line method, determine the ultimate uniformly distributed load per unit area

$q_u$ of a hexagonal slab fixed around the edges.

The slab is reinforced in the top and bottom with ultimate negative and positive moments of

resistance per unit width $m_u$ 'and $m_u$ respectively.

In order to increase the punching shear capacity, several strategies and provisions can be

adopted. Give, with a brief description, at least four methods of increasing the punching shear

capacity of the slab.