考虑近场地震竖向效应的改进Pushover分析方法

发布时间：2018-01-18 09:52

  本文关键词：考虑近场地震竖向效应的改进Pushover分析方法　出处：《振动与冲击》2015年20期 　论文类型：期刊论文

  更多相关文章： 近场地震 竖向效应 Pushover分析方法

【摘要】：基于结构动力学理论推导两种考虑近场地震竖向效应的改进Pushover分析方法。按合理方式在结构的每个集中质量处施加竖向地震力,并据结构屈服后动力特性对其水平加载模式及形状向量进行修正。采用两种改进Pushover分析方法及两种传统Pushover分析方法,估计近场条件下两个框架结构顶点位移、楼层位移及层间位移。以算例结构在30组近场地震记录作用下的时程分析统计结果为基准,评估4种Pushover分析方法估计精度。结果表明,改进方法Ⅱ的精度最高,对算例框架最大顶点位移、最大楼层位移及最大层间位移估计结果均较准确,可用于近场条件下规则结构的地震反应分析及地震损伤评估。
[Abstract]:Based on the theory of structural dynamics, two improved Pushover analysis methods considering the vertical effect of near-field earthquakes are derived. The vertical seismic forces are applied to each concentrated mass of the structure in a reasonable manner. According to the dynamic characteristics of the structure after yield, the horizontal loading mode and shape vector are modified. Two improved Pushover analysis methods and two traditional Pushover analysis methods are adopted. The vertex displacement, floor displacement and floor displacement of two frame structures under near-field conditions are estimated. The statistical results of time-history analysis of two frame structures under the action of 30 groups of near-field seismic records are taken as the benchmark. The estimation accuracy of four Pushover analysis methods is evaluated. The results show that the precision of improved method 鈪，

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