Shear capacity of prestressed hollow core slabs on flexible supports

It is widely believed that reduction of unfavorable effects of shear stress in the HC slab’s web can be achieved by filling the cores with concrete or through the arrangement of the monolithic layer or concrete topping. The fib guidelines are practically the only document which allows for determining the shear capacity of HC slabs, including the influence of concrete topping or core filling – a description of this design model and the calculation analysis are presented in the paper. In order to determine the effect of concrete topping on the behaviour of prestressed HC slabs on flexible supports, a number of calculation analyses were performed. The results of the calculations and the conclusions resulting from it are presented in the paper.