08.51: An experimental study of composite beam‐column joints subject to impact loads

Abstract

Beam-column joints are one of the key elements in steel and composite frames. Till now, many research studies have focused on the behaviour of bare steel beam-column joints and the influence of composite slabs subjected to quasi-static loads. In this study, the research was extended to dynamic loading condition. Two beam-column joint specimens with composite slabs, which were designed based on Eurocode 4, were tested using an MTS drop-weight machine. This loading condition is probably more realistic for joints under progressive collapse scenario, which is a dynamic process. One of the specimens was a middle joint subject to sagging moment. The other specimen was a side joint subject to hogging moment. Behaviour of both joint specimens, including impact force, displacement of the middle column, strain and failure mode, was presented. Differences in the behaviour of the two joint specimens were observed and explained.

An experimental study of composite effect on the behaviour of beam-column joints subjected to impact load

“…Unlike previous tests on fin plate connections conducted by the authors [13], complete fracture of the composite joint was not observed in both specimens since they could resist the impact loads. Failure of C75W-M770H3 concentrated in concrete slabs as shown in Figs.…”

“…Impact loads were applied to the specimens using an MTS drop-weight testing machine in Protective Engineering Laboratory in Nanyang Technological University [13]. Fig.…”