地下结构抗震分析与设计的Pushover方法适用性研究  

STUDY ON APPLICABILITY OF A PUSHOVER ANALYSIS METHOD FOR SEISMIC ANALYSIS AND DESIGN OF UNDERGROUND STRUCTURES

作　　者：刘晶波[1] 刘祥庆[1] 薛颖亮[2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]中国建筑科学研究院,北京100013

出　　处：《工程力学》2009年第1期49-57,共9页Engineering Mechanics

基　　金：国家自然科学基金(50478014);国家973项目(2007CB714203);北京市自然科学基金重点项目(8061003)

摘　　要：目前已提出了一种适用于地下结构抗震分析与设计使用的Pushover分析方法,介绍了该方法水平荷载分布形式与目标位移的确定思路以及实施步骤。分别通过改变结构在地基中的埋深、地基土体刚度和结构材料强度对地下结构Pushover分析方法的适用性进行了研究,将不同情况下该方法的计算结果与基于粘弹性静-动力统一人工边界的静-动力联合分析方法结果进行了对比。由计算结果可以看到Pushover分析方法与静-动力联合分析方法符合较好,表明该方法具有良好的适用性与计算精度,可以用于地下结构的抗震分析与设计。A Pushover method for seismic analysis and design of underground structures has been presented. Using that method, the determination procedure of equivalent horizontal inertial acceleration distribution and the target displacement is introduced in this paper together with the associated implementation procedure. Study on the applicability of the method is carried out by changing the burial depth of the structure, the stiffness of soil and the concrete strength of the structure respectively. The results obtained through the method are compared with those obtained through the static-dynamic coupling analysis based on the unified viscous-spring artificial boundary. It can be found that the results obtained through the two methods are in good agreement, indicating that the Pushover analysis method introduced in the paper has a high applicability and a good computational accuracy, and hence is suitable for the seismic analysis and design of underground structures.

关 键 词：地下结构 PUSHOVER分析方法 抗震分析 适用性 土-结构相互作用 

分 类 号：TU311.3[建筑科学—结构工程] TU352.1