【摘要】 将结构静力弹塑性分析与地震反应谱结合起来的Pushover方法作为一种简单而有效的结构抗震能力评价工具,目前已在我国逐渐得到推广。在已有的研究基础上,通过一种基于滞回耗能的自适应Pushover分析,将滞回耗能引入到Pushover分析中,且采用白适应的加载方式来考虑高阶振型的影响。对一中等高度的结构进行推覆分析,结果表明,所提方法对结构响应的估计与时程分析更为接近,尤其是在受高阶振型影响比较明显的层间位移方面,具有较高的计算精度。更多还原

【Abstract】 Pushover analysis,as a combination of static elastoplastie analysis and earthquake response is becoming a popular tool for seismic performance evaluation of existing and being designed structures.The method summarized and evaluated herein is an improved pushover analysis based on hysteretic energy,which adopts adaptive distribu- tion of lateral force and accounts for the contributions of higher modes.A numerical example demonstrates that the structural responses from the proposed pushover analysis are generally similar to the results from the nonlinear dy- namic response analysis,especially for the story drift,which is mostly affected by the higher modes.更多还原