高层建筑结构基于整体稳定的失效判别方法

Analysis on Gravity Second-order Effects and the Overall Stability of the High-rise Structure

高层建筑结构失效演化过程量化是实现基于性能抗震设计方法的关键步骤之一。本文从高层建筑结构整体稳定出发,得到高层建筑结构的临界等效刚重比;通过整体稳定平衡分析提出了基于等效刚重比变化的失效判别方法;通过罕遇地震作用下的弹塑性时程分析及与试验现象对比,验证了该方法的正确性。

Quantization of failure evolution processe on high-rise building structures is one of the key procedures of performance seismic design methods. The critical equivalent stiffness-weight ratio is obtained based on analysis of structural overall stability; the failure evolution process description based on the equivalent stiffness is given combined with the existing researches and methods of structure overall damage, and the structure damage assessment method is proposed, which based on the changes of the equivalent stiffness-weight ratio. Eventually, rare earthquake elastoplastic time-history response analysis and quasi-static test are performed for verifying the proposed method.