铁道标准设计2025，Vol.69Issue(10)：133-140,8.DOI:10.13238/j.issn.1004-2954.202505200003
盾构隧道纵向抗震简化计算模型对比
Comparative Study on Simplified Longitudinal Seismic Calculation Models for Shield Tunnel
摘要
Abstract
To compare the applicability and computational accuracy of the longitudinal equivalent stiffness beam model and the longitudinal beam-spring model in longitudinal seismic analysis of shield tunnels,this study employed the generalized longitudinal response displacement method for both models.The time-history of internal forces and peak envelope results were compared.The results showed that:(1)both the longitudinal equivalent stiffness beam model and the longitudinal beam-spring model produced consistent time-history curves of seismic-induced bending moment and axial force,and similar envelope curves along the tunnel.The seismic-vulnerable zones near soft-hard rock interfaces identified by both models were nearly the same,extending approximately 10 segment widths on either side of the interface.(2)Under longitudinal seismic excitation,the longitudinal bending moments in the vertical plane and axial forces dominated the structural response,while the bending moments in the horizontal plane were nearly zero.Under transverse seismic excitation,the longitudinal bending moments in the horizontal plane dominated,with the vertical-plane longitudinal bending moments and axial forces both diminishing to negligible levels.This indicated that the peak values and directions of longitudinal internal forces were highly sensitive to the direction of seismic excitation.(3)The longitudinal equivalent(flexural)stiffness model produced bending moments comparable in magnitude and accuracy to the longitudinal beam-spring model.However,its inability to simulate the distinct tensile/compressive behaviors of circumferential joints led to inaccurate axial force results.In contrast,the seismic internal forces from the beam-spring model enveloped those from the equivalent stiffness beam model.The comparative study demonstrates that the longitudinal beam-spring model offers superior practical value by explicitly simulating the mechanics of ring joints while maintaining computational efficiency and delivering precise results.关键词
盾构隧道/纵向广义反应位移法/等效刚度梁模型/梁-弹簧模型/纵向抗震计算Key words
shield tunnels/generalized longitudinal response displacement method/equivalent stiffness beam model/beam-spring model/longitudinal seismic calculation分类
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张景..盾构隧道纵向抗震简化计算模型对比[J].铁道标准设计,2025,69(10):133-140,8.基金项目
陕西省创新能力支撑计划项目(2024ZC-KJXX-130) （2024ZC-KJXX-130）
中国铁建股份有限公司地下空间利用领域科研计划项目(2024-W24) （2024-W24）
中铁第一勘察设计院集团有限公司科研项目(KY23-B036) （KY23-B036）
