14.06: Beam‐to‐column joints, column bases and joint components under impact loading

Abstract

Recent events such as natural catastrophes or terrorist attacks have highlighted the necessity to ensure the structural integrity of buildings under exceptional events. For more than 10 years, the University of Liege is strongly involved in researches on the response of structures further to such exceptional events through participations to national or European research projects. In particular, the University of Liege has contributed very recently to a European research project entitled ROBUSTIMPACT investigating the behaviour of steel or steel-concrete composite building structures subjected to impact loading and proposing simplified procedures to predict the response of such structures under the considered scenario. As a contribution to this research project, an experimental test campaign was realised in Liège; the objective was to study the behaviour of beam-to-column joints, of column bases and of most of their constitutive components under impact loading and, in particular, to highlight the influence of the strain rate effects on the response of the studied joints and components. The proposed paper first describes the conducted test campaign with all the required details about the tested specimens and the testing setup; then the analysis of the so-obtained experimental results is presented. Finally authors' views on how to account for the strain rate effects in analytical approaches for joint design is briefly expressed. .

Characterisation of the Behaviour of Beam-to-Column Steel Joints Up to Failure

“…The experimental programme, including the test setup, was thoroughly presented by Demonceau et al [10]. A schematic view of the experimental setup is illustrated in Fig.…”

Numerical and experimental investigation of simply supported steel beams under drop‐weight impact tests

“…An "exceptional" event may lead to abnormal damage in structures, to the propagation of this local failure and, finally, to a progressive collapse. The concept of DIF (dynamic increase factor) represents a simplified way to account for dynamic performing simplify static analysis and this coefficient is already widely used in literature (9,10). This property of a structural system to redistribute the additional loads avoiding partial or total progressive collapse is called robustness (8).…”

“…Since progressive collapse may lead to a dynamic nonlinear response of a structure, dynamic effect cannot be neglected. The concept of DIF (dynamic increase factor) represents a simplified way to account for dynamic performing simplify static analysis and this coefficient is already widely used in literature (9,10). The knowledge of the dynamic behaviour of structural elements under dynamic loadings has to be assessed.…”