Seismic response of segmental tunnel in soil-rock strata under longitudinal excitation: experimental and numerical analysis

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-09 DOI:10.1016/j.soildyn.2025.109770

Siming Li , Yong Yuan , Haitao Yu , Jinghua Zhang , Mingqing Xiao , Roberto Cudmani

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引用次数: 0

Abstract

Tunnels passing through inhomogeneous ground conditions are particularly susceptible to significant damage during earthquakes. This study investigates the seismic response of a segmental tunnel crossing soil-rock strata under longitudinal excitation. A 1g shaking table test is conducted to model the soil-structure interaction (SSI) system. Earthquake input and observation focus on longitudinal SSI. The experimental results are then employed to calibrate a 3D finite element (FE) model, where the seismic behavior of synthetic model soil is characterized by a kinematic hardening constitutive model, and the model rock and tunnel are simulated using an elastic constitutive model. The validated FE model shows good agreement with the shaking table test results and provides insights into the longitudinal joint deformation and overall deformation patterns of the tunnel. Considering the key seismic characteristics of the tunnel, a simplified analytical model for calculating the joint extension is developed and verified against the numerical results, quantitively revealing the concentrated joint deformation caused by the ground with abruptly varying stiffness.

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土-岩地层中管片隧道纵向激励下的地震响应：试验与数值分析

隧道穿过不均匀的地面条件，在地震期间特别容易受到重大破坏。本文研究了在纵向激励作用下，跨土-岩段隧道的地震响应。采用1g振动台试验模拟了土-结构相互作用（SSI）体系。地震输入和观测主要集中在纵向SSI上。利用试验结果对三维有限元模型进行标定，其中合成模型土的地震行为采用运动硬化本构模型，模拟岩石和隧道采用弹性本构模型。验证后的有限元模型与振动台试验结果吻合较好，为洞悉隧道节理纵向变形和整体变形规律提供了依据。考虑隧道的关键地震特征，建立了节理扩展计算的简化解析模型，并与数值结果进行了对比验证，定量揭示了突变刚度地基引起的节理集中变形。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.