文献类型：期刊文献

中文题名：跨活动断裂带城市浅埋地铁隧道结构两阶段设计方法研究

英文题名：Study on two-level design method of urban shallow subway tunnel structure crossing active fault

作者：安韶[1];陶连金[1];边金[2];张宇[1];韩学川[1]

机构：[1]北京工业大学,工程抗震与结构诊治北京市重点实验室,北京100124;[2]广东海洋大学海洋工程学院,广东湛江524008

年份：2020

卷号：51

期号：9

起止页码：2558

中文期刊名：中南大学学报（自然科学版）

外文期刊名：Journal of Central South University:Science and Technology

收录：CSTPCD、、EI(收录号：20204509468655)、北大核心2017、Scopus、CSCD2019_2020、北大核心、CSCD

基金：国家重点研发计划项目(2017YFC0805403);国家自然科学基金资助项目(41877218)。

语种：中文

中文关键词：断层错动;地铁隧道;两阶段设计方法;最不利错动面

外文关键词：fault dislocation;subway tunnel;two-level design method;the most disadvantageous fault rupture plane

中文摘要：考虑到活动断裂带场地错动危险发生的不确定性,以乌鲁木齐轨道交通2号线工程为例,提出适用于断层错动作用下城市浅埋地铁隧道结构的两阶段设计方法。首先给出错动作用下城市浅埋地铁隧道的两阶段设计内容,其次建立三维弹塑性有限元模型,并按照包络设计原则确定最不利错动面,最后对区间隧道结构进行不同设计阶段的损伤破坏分析。研究结果表明:在错动作用下,两阶段设计水准要求与抗震设防水准保持一致。乌鲁木齐地铁2号线区间隧道上盘与破碎带交界面为最不利错动面;采用柔性接头减灾措施以后,在区间隧道进行100 a内超越概率为10%的错动量分析时,结构处于弹性状态或部分处于弹塑性状态,满足第一阶段设防水准要求。在进行100 a内超越概率为3%~2%的错动量分析时,结构的破坏控制在局部区域内,防止了整体倒塌,满足第二阶段设防水准要求。

外文摘要：In consideration of uncertainties of fault dislocation,taking the Urumqi rail transit line 2 project as an example,a two-level design method for urban shallow subway tunnel under effect of fault dislocation was proposed.Firstly,the two-level design content was given,and then the three-dimensional elastic-plastic finite element models of soil-tunnel structure were established to determine the most disadvantageous fault rupture plane based on envelope design principle.Finally,the damage analysis of the tunnel structure in different design levels was carried out.The results show that the two-level design content during fault dislocation is consistent with that of seismic design,and the interface between hanging wall and fracture zone of Urumqi subway tunnel is determined as the most disadvantageous fault rupture plane.With the disaster mitigation method of flexible joint,the tunnel structure is in elastic state or partially in elastic-plastic state under the effect of fault displacement of exceeding probability 10%in one hundred years,satisfying the fortification requirements of the first level.Under the action of fault displacement of exceeding probability 3%?2%in one hundred years,the tunnel structure is in elastic-plastic state and the damage of structure is controlled in the local area preventing the overall collapse,satisfying the fortification requirements of the second level.