フロリダマンション崩落事故の再現解析

Numerical Investigation on the Collapse of the Champlain Towers South in Florida

Abstract

近年，構造部材の劣化による建物の進行性崩壊が多発しており，社会的財産や人命にとって大きな脅威となっている．部材が劣化した建物の倒壊メカニズムを解明することにより，建物の補強を効果的に行うことができ，予期せぬ崩壊の防止に繋がることが予想できる．そこで本研究では，フロリダマンション崩落事故の調査資料に基づいて，その事故の再現解析を試みた．

In this study, the building collapse of the Champlain Towers South in Florida allegedly caused by deck collapse was examined through the finite element analysis based on the existing hypotheses and investigation. For the numerical analysis, the Adaptively Shifted Integration (ASI) – Gauss code was applied. In addition, the member strength failure algorithm of RC components was modified and the flat-plate structure was introduced into the numerical model of the building. According to the numerical results, the building did not collapse when the external deck of the building connecting the columns, so called as key elements, were removed by the collapse of the external deck.