Theoretical and Experimental Studies Regarding Steel–Concrete Composite Joints

摘要

Theoretical approaches supplemented with an experimental testingprogram were developed at the ?Politehnica” University of Timi?oara for a specific steel–concrete composite joint, used into a multi-storey skeletal structure. Starting with thejoint type used, two series of joints were tested. Two loading hypotheses of the joint wereconsidered: symmetrical and asymmetrical.For the structures placed in seismic areas the energy dissipation during earthquakeis important. The dissipation of energy consists in appearance of plastic hinges located into the beams. For this study the pursued aim was to obtain the collapse mechanism in thejoint panel rather than outside the joint, in order to compare the bending resistant momentof steel joint with the bending resistant moment of composite joint.Using the previsions of EC4 [1], in the theoretical phase the joints were analysedtogether with their connections – the beams and the columns in order to establish thedimensions of the joint components, thus satisfying the desired collapse mechanism. Alsoa numerical study was performed in the elastic and post elastic range. Finally theexperimental work was performed using special testing equipment and the internationalrecommended testing procedures. This paper presents some aspects regarding thebehaviour of steel and steel joints tested.