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Title |
Evaluation Concept of Progressive Collapse Sensitivity of Steel Moment Frame using Energy-based Approximate Analysis
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Authors |
노삼영(Sam-Young Noh) ; 박기환(Ki-Hwan Park) ; 이상윤(Sang-Yun Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.5.108 |
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Keywords |
연쇄붕괴 저항성능 ; 구조 강건성 ; 구조 민감성 ; 비선형 정적해석 ; 에너지 기반 근사해석 Resistance performance of progressive collapse ; Structural robustness ; Structural sensitivity ; Nonlinear static analysis ; Energy-based approximate analysis |
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Abstract |
In this study, the prototype structure of seismically designed steel moment frame was analyzed statically and dynamically in order to demonstrate the applicability of energy-based approximate analysis with the dynamic effect of sudden column loss in the evaluation of the collapse resistance and a method for assessing the sensitivity to progressive collapse was proposed. For the purpose of comparing the structural behavior of buildings with different structural systems, the sensitivity of the structure to the sudden removal of vertical members can be used as a significant measure. The energy-based approximate analysis prediction for the prototype structure considered in the study showed good agreement with the dynamic analysis result. In the sensitivity evaluation, the structural robustness index that indicates the ability of a structure to resist collapse induced by abnormal loads was used. It was confirmed that the proposed methods can be used conveniently and rationally in progressive collapse analysis and design.
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