作　　者： ; ; ;

机构地区： 中国地震局工程力学研究所

出　　处： 《地震工程与工程振动》 2006年第6期50-55,共6页

摘　　要： 鉴于传统pushover方法不能考虑结构高阶振型的贡献,从而难以应用到高层结构中,有学者提出采用考虑多阶振型组合作用的模态pushover分析方法。本文通过考虑结构屈服后地震作用发生变化这一特性,对此方法进行了改进并通过算例进行了验证。结果表明本文改进的方法有很好的精度。 Because the traditional pushover analysis can not take the contributions of higher modes into account, it is difficult to apply this method to high-rise structures. To overcome this limitation, a modal pushover analysis procedure （MPA） is proposed by some researchers, which can involve the combination of multi-mode contributions to response. In this paper, much improvement on MPA procedure is made with consideration of the redistribution of inertia forces after structural yielding. The method is verified by one example. It is concluded that the method presented in this paper has higher accuracy than MPA procedure.

关 键 词： 模态 分析 侧向荷载模式 能力曲线 地震需求

领　　域： [天文地球] [天文地球] [天文地球]