摘要
地震作用下隧道结构的稳定性是至关重要的,一旦遭到大地震的震害,会造成不可估量的损失。建立隧道洞口段三维有限元模型,运用有限元差分方法,对软岩不同弹性模量、泊松比以及坡度在地震作用下进行动力响应分析,通过拱顶、拱腰、拱脚监测点研究隧道洞口段最大加速度和最大水平位移的变化情况,得到在软岩不同弹性模量、泊松比以及坡度条件下隧道洞口段动力特征响应规律和塑性区分布变化情况。
The stability of the tunnel structure under earthquake action is very important. Once it is damaged by a large earthquake, it will cause immeasurable losses. In this paper, the three-dimensional finite element model of tunnel portal section is established. Finite element difference method is used to analyze the dynamic response of soft rock with different elastic modulus, Poisson’s ratio and slope under earthquake action. The tunnel is studied through the dome, arch waist and arch foot monitoring points. The variation of maximum acceleration and maximum horizontal displacement of the portal section is obtained, and the dynamic characteristics of the tunnel portal section and the distribution of plastic zone are obtained under different elastic modulus, Poisson’s ratio and slope conditions of soft rock.
作者
刘博清
赵杰
王桂萱
兰雯峻
LIU Boqing;ZHAO Jie;WANG Guixuan;LAN Wenjun(The R&D Center of the Civil Engineering Technology,Dalian University,Dalian,Liaoning 116622,China)
出处
《水利与建筑工程学报》
2019年第6期151-157,共7页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金面上项目(51678100)
辽宁省自然科学基金指导计划(20170540043)
辽宁省教育厅项目(L2015035)
关键词
隧道结构
洞口段
软岩
动力响应
tunnel structure
hole section
soft rock
dynamic response
