Seismic response of deep circular tunnels subjected to S-waves: Axial bending

IF 8.2 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space Pub Date : 2024-02-21 DOI:10.1016/j.undsp.2023.11.013

Chatuphat Savigamin , Antonio Bobet , Osvaldo P.M. Vitali

{"title":"Seismic response of deep circular tunnels subjected to S-waves: Axial bending","authors":"Chatuphat Savigamin , Antonio Bobet , Osvaldo P.M. Vitali","doi":"10.1016/j.undsp.2023.11.013","DOIUrl":null,"url":null,"abstract":"<div><p>Ovaling deformation of circular tunnels has received great interest from the tunneling community because this mode of seismic-induced deformation is considered the most critical. However, there is growing evidence that other deformation modes can also be important and thus need to be considered in design. This study presents a new analytical solution to estimate axial bending (snaking), a mode of deformation caused by S-waves impinging on a tunnel parallel to the tunnel axis. The solution is developed using the soil-structure interaction approach with the assumption that the interface between the ground and the tunnel lining is frictionless (full-slip). Full dynamic numerical simulations are conducted to verify the new full-slip solution, together with the existing no-slip solution. Effects of dynamic amplification are also explored for both full-slip and no-slip interface conditions by changing the wavelength (or frequency) of the seismic input motions.</p></div>","PeriodicalId":48505,"journal":{"name":"Underground Space","volume":"17 ","pages":"Pages 267-279"},"PeriodicalIF":8.2000,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2467967424000187/pdfft?md5=6155d453f80aeb0d1c8e3f6d10fff197&pid=1-s2.0-S2467967424000187-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Underground Space","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2467967424000187","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

Ovaling deformation of circular tunnels has received great interest from the tunneling community because this mode of seismic-induced deformation is considered the most critical. However, there is growing evidence that other deformation modes can also be important and thus need to be considered in design. This study presents a new analytical solution to estimate axial bending (snaking), a mode of deformation caused by S-waves impinging on a tunnel parallel to the tunnel axis. The solution is developed using the soil-structure interaction approach with the assumption that the interface between the ground and the tunnel lining is frictionless (full-slip). Full dynamic numerical simulations are conducted to verify the new full-slip solution, together with the existing no-slip solution. Effects of dynamic amplification are also explored for both full-slip and no-slip interface conditions by changing the wavelength (or frequency) of the seismic input motions.

查看原文本刊更多论文

深圆隧道在 S 波作用下的地震响应：轴向弯曲

圆形隧道的椭圆形变形受到了隧道界的极大关注，因为这种地震引起的变形模式被认为是最关键的。然而，越来越多的证据表明，其他变形模式也很重要，因此需要在设计中加以考虑。本研究提出了一种新的分析解决方案，用于估算轴向弯曲（蛇形），这是一种由平行于隧道轴线的 S 波冲击隧道所引起的变形模式。该解决方案采用土-结构相互作用方法，假设地面与隧道衬砌之间的界面是无摩擦的（全滑动）。为了验证新的全滑动解决方案和现有的无滑动解决方案，我们进行了全动态数值模拟。此外，还通过改变地震输入运动的波长（或频率），探讨了全滑动和无滑动界面条件下的动态放大效应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Underground Space ENGINEERING, CIVIL-

CiteScore

10.20

自引率

14.10%

发文量

审稿时长

63 days

期刊介绍： Underground Space is an open access international journal without article processing charges (APC) committed to serving as a scientific forum for researchers and practitioners in the field of underground engineering. The journal welcomes manuscripts that deal with original theories, methods, technologies, and important applications throughout the life-cycle of underground projects, including planning, design, operation and maintenance, disaster prevention, and demolition. The journal is particularly interested in manuscripts related to the latest development of smart underground engineering from the perspectives of resilience, resources saving, environmental friendliness, humanity, and artificial intelligence. The manuscripts are expected to have significant innovation and potential impact in the field of underground engineering, and should have clear association with or application in underground projects.