地下结构抗震分析与设计的Pushover方法适用性研究
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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.
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.
引文
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[9]陆新征,缪志伟,江见鲸.静力和动力荷载作用下混凝土高层结构的倒塌模拟[J].山西地震,2006(2):7―11.Lu Xinzheng,Miao Zhiwei,Jiang Jianjing.Collapse simulation of high-rise structure of concrete under the action of static and dynamic load[J].Earthquake Research in Shanxi,2006(2):7―11.(in Chinese)
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[11]刘晶波,李彬.三维黏弹性静-动力统一人工边界[J].中国科学(E辑),2005,35(9):966―980.Liu Jingbo,Li Bin.A unified viscous-spring artificial boundary for3-D static and dynamic applications[J].Science in China(Series E),2005,48(5):570―584.(in English)
[2]Chou Chung-Che,Uang Chia-Ming.A procedure for evaluating seismic energy demand of framed structures[J].Earthquake Engineering and Structural Dynamics,2003,32(2):229―244.
[3]刘晶波,李彬.地铁地下结构抗震分析及设计中的几个关键问题[J].土木工程学报,2006,39(6):106―110.Liu Jingbo,Li Bin.Issues on the seismic analysis and design of subway structures[J].China Civil Engineering Journal,2006,39(6):106―110.(in Chinese)
[4]李彬.地铁地下结构抗震理论分析与应用研究[D].北京:清华大学,2005.Li Bin.Theoretical analysis of seismic response of underground subway structures and its application[D].Beijing:Tsinghua University,2005.(in Chinese)
[5]刘晶波,刘祥庆,李彬.地下结构抗震分析与设计的Pushover分析方法[J].土木工程学报,2008,41(4):87―94.Liu Jingbo,Liu Xiangqing,Li Bin.A Pushover analysis method for seismic analysis and design of underground structures[J].China Civil Engineering Journal,2008,41(4):87―94.(in Chinese)
[6]Idriss I M,Sun J I.SHAKE91:A computer program for conducting equivalent linear seismic response analysis of horizontally layered soil deposits User’s Guide[R].California:University of California,Davis,1992.
[7]刘晶波,李彬,谷音.地铁盾构隧道地震反应分析[J].清华大学学报,2005,45(6):757―760.Liu Jingbo,Li Bin,Gu Yin.Seismic response analysis of shielded subway tunnels[J].Journal of Tsinghua University,2005,45(6):757―760.(in Chinese)
[8]刘祥庆,刘晶波.基于纤维模型的拱形断面地铁车站结构弹塑性地震反应时程分析[J].工程力学,2008,25(10):150―157.Liu Xiangqing,Liu Jingbo.Time history analysis of elasto-plastic seismic response of a subway station structure with arched cross section based on fiber model[J].Engineering Mechanics,2008,25(10):150―157.(in Chinese)
[9]陆新征,缪志伟,江见鲸.静力和动力荷载作用下混凝土高层结构的倒塌模拟[J].山西地震,2006(2):7―11.Lu Xinzheng,Miao Zhiwei,Jiang Jianjing.Collapse simulation of high-rise structure of concrete under the action of static and dynamic load[J].Earthquake Research in Shanxi,2006(2):7―11.(in Chinese)
[10]刘晶波,吕彦东.结构-地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998,31(3):55―64.Liu Jingbo,Lu Yandong.A direct method for analysis of dynamic soil-structure interaction[J].China Civil Engineering Journal,1998,31(3):55―64.(in Chinese)
[11]刘晶波,李彬.三维黏弹性静-动力统一人工边界[J].中国科学(E辑),2005,35(9):966―980.Liu Jingbo,Li Bin.A unified viscous-spring artificial boundary for3-D static and dynamic applications[J].Science in China(Series E),2005,48(5):570―584.(in English)
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