Numerical study on flexural capacity of biaxial hollow slab

Biaxial hollow slab is a type of slab in which concrete from the middle of the slab (floor) has been eliminated by means of voids. This type of slab system is mainly used as reinforced concrete flat slab. Its main advantage is reduction in self-weight (about 30–50%). However, the presence of voids reduces the area of slab concrete, which leads to reduction in the flexural stiffness and shear resistance. In this study, simulations were carried out by using finite element software DIANA (Displacement Analyzer) to investigate the flexural capacity of the biaxial hollow slab. Parametric studies were carried out to compare the effect of different types of voids on the behaviour of the slab.