EXPERIMENTAL STUDY ON THE BEHAVIOUR OF STEEL AND CONCRETE JOINT COMPONENTS IN LARGE DISPLACEMENT FIELD

摘要

Structural collapses due to accidental loads recent happened highlighted the inadequacy of the actual design approaches which are not able to guarantee adequate safety levels in case of local damages which could induce the failure of the whole structure. Despite methodologies and strategies to prevent progressive collapse are well outlined, they are only partially transposed in design requirement. At this aim studies and researches, some of them currently in progress, were activated. The authors of this paper are involved in an European research project, focused on the behaviour of composite steel and concrete structures under accidental loading condition. The main purpose of the study is the analysis of the composite joints response in terms of ductility as a way to prevent progressive collapse. Within this framework the authors focused their study on the contribution of the joint components to the performance of the whole joint in large displacements. At this aim a series of tests on both concrete and steel joint components were planned. In this paper, the main features of the experimental activities are presented. Furthermore, the preliminary results of the study as well as the preliminary outcomes of their evaluation are presented and discussed.