Risk Estimation for Progressive Collapse of Buildings Using Key Element Index


In this study, the collapse behaviors of steel-framed buildings were simulated to investigate the relation between a key element index and the damage due to progressive collapse. The key element index is a parameter which indicates the contribution of a structural column to the vertical capacity of the structure. The collapse behaviors of steel framed buildings were simulated using the ASI (Adaptively Shifted Integration) -Gauss code, which can explicitly express member fracture and element contact in the collapse process. The progressive collapse phenomena were initiated by removing specific columns from the models. The total potential energy values of structural members after the collapse were used to estimate the damage of the buildings.

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