[1]黄忠凯,张冬梅.软土地区地表结构对盾构隧道地震响应影响的风险分析[J].自然灾害学报,2018,(04):067-74.[doi:10.13577/j.jnd.2018.0409]
 HUANG Zhongkai,ZHANG Dongmei.Risk analysis of the seismic resposnse of shield tunnel considering the above ground structutre in soft deposits[J].,2018,(04):067-74.[doi:10.13577/j.jnd.2018.0409]
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软土地区地表结构对盾构隧道地震响应影响的风险分析
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年04期
页码:
067-74
栏目:
出版日期:
2018-09-28

文章信息/Info

Title:
Risk analysis of the seismic resposnse of shield tunnel considering the above ground structutre in soft deposits
作者:
黄忠凯12 张冬梅12
1. 同济大学 岩土及地下工程教育部重点实验室, 上海 200092;
2. 同济大学 地下建筑与工程系, 上海 200092
Author(s):
HUANG Zhongkai12 ZHANG Dongmei12
1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
关键词:
盾构隧道地表结构地震响应风险分析数值模拟
Keywords:
shield tunnelabove ground structutreseismic responserisk analysisnumerical model
分类号:
X9;U231+.94;U45
DOI:
10.13577/j.jnd.2018.0409
摘要:
本文基于ABAQUS有限元软件建立了软土地区地表结构-土-隧道相互作用的非线性有限元模型,地表结构采用置于刚性筏板基础的单自由度体系模拟。考虑地表结构的有无,不同的土体模型及地震荷载,通过水平地震作用下的动力时程反应分析,研究了地表结构对盾构隧道周围土体以及衬砌地震响应的影响。研究表明,地表结构的存在会增大隧道周围土体地震响应,从而引起隧道结构变形以及动态内力的显著增加,同时发现采用弹塑性分析下的隧道地震响应大于采用黏弹性分析。因此,地表结构作用是影响盾构隧道响应的重要因素,综合分析地表结构-土-隧道作用下的结构动态响应有助于更合理的预测地震荷载下盾构隧道结构安全风险。
Abstract:
In this paper, a nonlinear numerical model accounts for the aboveground structure-soil-tunnel interaction in soft soil deposits was established based on finite element software ABAQUS, the aboveground structure was simulated using equivalent single degree of freedom oscillators, rested on rigid raft foundation. The influence of aboveground structure on the seismic response of lining and soil around the tunnel was studied through the dynamic time history analyses subjected to horizontal earthquake loading, accounting for the existence of aboveground structure, different soil models and earthquake inputs.The results reveal that the existence of aboveground structure can increase the seismic response of the soil around the tunnel, thus increasing the tunnel lining displacement and forces significantly.Moreover, the seismic response of elastoplastic analyses was generally higher than that of visco-elastic analyses. Therefore, aboveground structure effect is a critical factor for the seismic response of shield tunnel, it’s recommended to conduct comprehensive analyses for the aboveground structure-soil-tunnel system in order to better predict the risk for the shield tunnel structural safety.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-05-30;改回日期:2018-06-18。
基金项目:国家自然科学基金项目(41772295,51478344);上海市科学技术委员会项目(16DZ1200403,170Z1203200)
作者简介:黄忠凯(1992-),男,博士研究生,主要从事隧道地震易损性分析研究.E-mail:5huangzhongkai@tongji.edu.cn
通讯作者:张冬梅(1975-),女,教授,博士,主要从事盾构隧道结构安全分析研究.E-mail:dmzhang@tongji.edu.cn
更新日期/Last Update: 1900-01-01