Abstract
<p>A common type of Slim-Floor-Constructions consists of prestressed hollow core slabs supported on the lower flange of transverse shallow steel beams. This construction method enables slender cei- lings without girders. However, the shear capacity of the hollow core slabs is considerably reduced due to transverse stresses when the supporting beams with a limited bending stiffness deflect. At the Institute of Structural Concrete at RWTH Aachen University, four full-scale tests on two-span floor systems were performed to investigate the load bearing behavior of hollow core slabs on flexible supports. The effects of several test parameters, such as cross section of the slabs, bending stiffness of the steel beam, bearing details, horizontal constraints of the slabs and filling of selected cores on the shear capacity were determined. International design provisions are briefly described and recommendations regarding the construction and the design are given.</p>
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