妈湾跨海大直径盾构隧道纵向抗震分析  

Longitudinal seismic analysis of Mawan sea-crossing largediameter shield tunnels

作　　者：蔡鑫[1] 梁建文[2] 徐安全 李东桥 吴泽群 闫启超 CAI Xin;LIANG Jianwen;XU Anquan;LI Dongqiao;WU Zequn;YAN Qichao(Shenzhen Traffic Facilities Construction Center,Shenzhen 518040,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]深圳市交通公用设施建设中心,广东深圳518040 [2]天津大学建筑工程学院,天津300350

出　　处：《自然灾害学报》2020年第6期13-20,共8页Journal of Natural Disasters

基　　金：深圳市交通公用设施建设中心科研项目。

摘　　要：利用广义反应位移法开展妈湾跨海大直径盾构隧道纵向抗震分析。采用黏弹性边界方法建立纵断面有限元模型,结合地震动输入的等效节点力方法和土体等效线性方法,求解安评波作用下,妈湾隧道全域场地的非线性地震响应。采用梁单元模拟盾构隧道管环,弹簧单元模拟盾构隧道环间螺栓,建立盾构隧道纵向抗震计算的三维梁-弹簧模型。考虑轴向和横向水平地震动耦联效应,进行盾构隧道的纵向抗震计算。研究对妈湾跨海大直径盾构隧道抗震设计具有一定参考价值。Longitudinal seismic analysis of Mawan sea-crossing large shield tunnels is presented using the generalized response deformation method.The viscoelastic boundary method is used to construct the finite element model,and the method of seismic excitation equivalent node force and the method of soil equivalent linearization are used to calculate the seismic response of whole longitudinal cross section under the seismic safety evaluation waves.The tunnel rings are simulated by the beam elements,the bolt joints are simulated by the spring elements,and the 3D beam-spring model is established for the longitudinal seismic analysis.With consideration of the coupling effect of horizontal seismic excitations between axial and transverse direction,the longitudinal seismic analysis of shield tunnels is carried out.This study may be of certain reference value for the seismic design of the Mawan sea-crossing large shield tunnels.

关 键 词：盾构隧道 纵向抗震分析 广义反应位移法 梁-弹簧模型 黏弹性边界 土体等效线性 水平方向地震动耦联效应 

分 类 号：TU91[建筑科学—建筑理论] X9[环境科学与工程—安全科学]