Progressive Collapse Analysis of Steel Moment Frames: An Energy-Based Method and Explicit Expressions for Capacity Curves
Publication: Journal of Performance of Constructed Facilities
Volume 33, Issue 2
Abstract
This paper presents a simplified model to evaluate progressive collapse response of steel beam–column substructures in a midspan column removal scenario. The model accounts for the influence of the span:depth ratio of the beam on progressive collapse behavior of substructures. The model was carefully validated against results obtained from rigorous numerical analyses. A single-story analogy was proposed to derive explicit expressions for progressive collapse–resisting capacity curves based on the energy conservation principle. The expressions covering the full range of loading—including interaction between the bending moments and beam axial load—and problem variables likely to be encountered in practice were derived. These explicit expressions can be applied in a step-by-step manner for tracing nonlinear behavior up to failure.
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Information
Published In
Journal of Performance of Constructed Facilities
Volume 33 • Issue 2 • April 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Feb 21, 2018
Accepted: Sep 5, 2018
Published online: Jan 22, 2019
Published in print: Apr 1, 2019
Discussion open until: Jun 22, 2019
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