EFFECT OF SHEAR CONNECTORS DISTRIBUTION AND CONCRETE COMPRESSIVE STRENGTH ON THE SHEAR TRANSFER OF ONE-WAY COMPOSITE PRE-SLABS

Abstract

The aim of this research is to study the influnce of concrete compressive strength, percentage, distribution of shear connectors and interface roughness on shear transfer of one-way composite pre-slabs, composed of two concrete layers with various concrete compressive strengths.A comprehensive literature review has been performed on almost all aspects concerning the behavior of reinforced concrete pre-slabs. An expermental program has been performed to explore the research point, so that fourteen pre-slabs specimens were tested under the case of uniformly distributed loads, one-concentrated and two-concentrated line loads. Specimens were grouped into four groups to study the influence of dowel distribution, percentage and surface condition between two slab layers. It was concluded that increasing of shear connectors ratio and roughening the interface surface lead to increase in ultimate load, horizontal shear strength and ductility, also decrease in dowels’ strain, horizontal slippage and deflection of pre-slabs.