An Overview of Progressive Collapse Behavior of Steel Beam-to-Column Connections

An Overview of Progressive Collapse Behavior of Steel Beam-to-Column Connections

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Local failure of one or more components due to abnormal loading can induce the progressive collapse of a building structure.In this study, by the aid of available full-scale gtech brush bar test results on double-span systems subjected to the middle column loss scenario, an extensive parametric study was performed to investigate the effects of different design parameters on progressive collapse performance of beam-to-column connections, i.e.

, beam span-to-depth ratio, catenary mechanism, and connection robustness.The selected full-scale double-span assemblies consisted of fully rigid (welded flange-welded web, SidePlate), semi-rigid (flush end-plate, extended end-plate), and flexible connections (top and seat angle, web cleat).The test results, including load-deformation responses, development of the catenary mechanism, and connection robustness, are presented in detail.

The finding of this research further enables a comprehensive comparison between different types ad24ce of steel beam-to-column connections since the effects of span-to-depth ratio and beam sections were filtered out.