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Dynamic amplification factor for progressive collapse resistance analysis of an RC building
Author(s) -
Tsai MengHao,
Lin BingHui
Publication year - 2009
Publication title -
the structural design of tall and special buildings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 43
eISSN - 1541-7808
pISSN - 1541-7794
DOI - 10.1002/tal.453
Subject(s) - progressive collapse , structural engineering , structural dynamics , nonlinear system , displacement (psychology) , amplification factor , hinge , reinforced concrete , materials science , engineering , physics , psychology , quantum mechanics , psychotherapist , amplifier , cmos , finite element method , optoelectronics
Linear static (LS), nonlinear static (NS) and nonlinear dynamic analyses were conducted to estimate the progressive collapse resistance of a reinforced concrete building. The step‐by‐step procedure recommended by the US General Service Administration was used for the LS analysis. Load‐displacement response curves were compared to investigate the force‐based dynamic amplification factor (DAF), which was defined in this study. It was observed that a constant DAF equal to 2·0 was conservative for estimating the collapse resistance of a ductile column‐removed building. However, the LS procedure may fail to appropriately simulate the inelastic response of the building. A capacity curve, constructed from the NS load‐displacement response, may be applied to prediction of the collapse resistance and DAF for a column‐removed building. An analytical method was proposed to demonstrate the dependency of the DAF on hinge model parameters. The proposed method was capable of predicting the collapse resistance and the force‐based DAF of an inelastic structure under vertical downward loadings. Copyright © 2008 John Wiley & Sons, Ltd.