意外荷载作用下建筑结构抗连续性倒塌分析

本文对建筑结构连续倒塌的原因进行分析,探讨意外荷载作用下建筑结构连续性倒塌的分析方法,提出确定失效构件位置的原则,对竖向承重构件失效后荷载的施加范围做了调整。在此基础上,对6层的钢筋混凝土框架结构进行了连续性倒塌分析。分析结果表明,按我国现行规范设计的钢筋混凝土框架结构抗倒塌能力不足。底层内柱失效后,结构存在较大的连续...

Progressive collapse analysis of building structure under accidental load

The causes for progressive collapse of building structure were analyzed in this paper;the methods to analysis the progressive collapse of building structure under accidental load were also discussed.The principle to determine the failure component was proposed.The range to apply the vertical load after the failure of vertical component was adjusted.According to the improved method,progressive collapse of a six-floor reinforcement concrete frame structure was analyzed.The results indicated that the reinforcement concrete frame structure designed according to current code of China was in poor resistance to collapse.When the inner column of the fist floor failed,the structure would be in serious risk of progressive collapse.