1.湖南工业大学土木工程学院,湖南 株洲 412007
2.华中科技大学土木工程与力学学院,湖北 武汉 430074
3.中国地震局工程力学研究所,黑龙江 哈尔滨 150080
宾佳(1988—),男,讲师,博士。主要从事隧道及地下结构抗震研究。E-mail:binjia@hut.edu.com
邹炎(1987—),男,博士后。主要从事隧道及地下结构抗震研究。E-mail:latro@qq.com
收稿:2019-03-20,
修回:2019-04-11,
纸质出版:2021-06-16
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宾佳,邹炎,景立平.双线地铁盾构隧道的拟静力弹塑性抗震分析[J].防灾减灾工程学报,2021,41(03):579-585.
BIN Jia,ZOU Yan,JING Liping.Pseudo⁃static Elastoplastic Seismic Analysis of Double⁃line Shield Tunnel[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):579-585.
宾佳,邹炎,景立平.双线地铁盾构隧道的拟静力弹塑性抗震分析[J].防灾减灾工程学报,2021,41(03):579-585. DOI: 10.13409/j.cnki.jdpme.201903056.
BIN Jia,ZOU Yan,JING Liping.Pseudo⁃static Elastoplastic Seismic Analysis of Double⁃line Shield Tunnel[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):579-585. DOI: 10.13409/j.cnki.jdpme.201903056.
目前地铁抗震设计规范中常用的地下结构抗震设计方法主要是位移响应法和应变传递法。这两种方法都是基于弹性假设,不能体现土体和地下结构的非线性。在刘晶波提出的地下结构Pushover分析方法的基础上,利用自主编制的一维土层地震反应分析软件APALS给出了随着地震动幅值增大而逐渐变化的地震荷载加载模式,并针对实际的双线地铁盾构隧道进行了拟静力弹塑性抗震分析,对其抗震性能进行了评价。结果表明:(1)隧道内力趋于一个极限值;(2)隧道的内力在
θ
=45°、135°、225°和315°的位置最大;(3)在隧道尚未破坏时,隧道周围的土层已经先达到破坏状态。
Currently, the major seismic design methods of underground structures in the subway specifications are categorized into the displacement response method and the strain transformation method. The two methods are both established on the elastic assumption, and cannot reflect the nonlinearity of soil and underground structures. Based on the Pushover analysis method of underground structures proposed by LIU Jingbo, this paper gives an evolving seismic load pattern with
PGA
increasing, which is developed using the self-compiled 1-D soil-layer seismic response analysis software APALS. Then the pseudo-static elastoplastic seismic analysis of the double-line shield tunnel is processed, and the seismic performance is evaluated. The results demonstrate that: (1) the internal forces of the tunnel approach extreme values; (2) the internal forces of the tunnel are maximum at the locations where
θ
=45°, 135°, 225° and 315°; (3) Before the tunnel get damaged, the surrounding soil has reached the failure state first.
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