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Prediction and validation of sidesway collapse of two scale models of a 4‐story steel moment frame
Author(s) -
Lignos D. G.,
Krawinkler H.,
Whittaker A. S.
Publication year - 2011
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.1061
Subject(s) - framing (construction) , structural engineering , scale model , component (thermodynamics) , frame (networking) , ground motion , progressive collapse , engineering , moment (physics) , computer science , geotechnical engineering , reinforced concrete , physics , mechanical engineering , thermodynamics , aerospace engineering , classical mechanics
A research program is summarized in which collapse of a steel frame structure is predicted numerically and the accuracy of prediction is validated experimentally through earthquake simulator tests of two 1:8 scale models of a 4‐story code‐compliant prototype moment‐resisting frame. We demonstrate that (1) sidesway collapse can occur for realistic combinations of structural framing and earthquake ground motion; (2) P − Δ effects and component deterioration dominate behavior of the frame near collapse; (3) prediction of collapse is feasible using relatively simple analytical models provided that component deterioration is adequately represented in the analytical model; and (4) response of the framing system near collapse is sensitive to the history that every important component of the frames experiences, implying that symmetric cyclic loading histories that are routinely used to test components provide insufficient information for modeling deterioration near collapse. Copyright © 2010 John Wiley & Sons, Ltd.