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Publication Citation: Performance of Steel Moment Connections under a Column Removal Scenario. I: Experiments

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Author(s): Hai S. Lew; Joseph A. Main; Stephen D. Robert; Fahim Sadek; Vincent Chiarito;
Title: Performance of Steel Moment Connections under a Column Removal Scenario. I: Experiments
Published: April 03, 2012
Abstract: This paper presents an experimental study of two full-scale steel beam-column assemblies, each comprising three columns and two beams, to (1) define their response characteristics under a column removal scenario, including the capacity of the beams and their connections to carry loads through catenary action, and (2) provide experimental data for validation of beam-to-column connection models for assessing the robustness of structural systems. The assemblies represent portions of the exterior moment-resisting frames of two ten-story steel frame buildings. One test specimen had welded unreinforced flange-bolted web connections, and the other had reduced beam section connections. When subjected to monotonically increasing vertical displacement of the unsupported center column, both specimens exhibited an initial elastic response dominated by flexure. With increased vertical displacement, the connections yielded, and axial tension developed in the beams. The axial tension in the beams increased until the connections failed under combined bending and axial stresses. The test results show that the rotational capacities of both connections under monotonic column displacement are about twice as large as those based on seismic test data.
Citation: Journal of Structural Engineering-ASCE
Keywords: Buildings; Connections; Full-scale tests; Progressive collapse; Seismic design; Steel structures
Research Areas: Progressive Structural Collapse
PDF version: PDF Document Click here to retrieve PDF version of paper (2MB)