地铁列车荷载下类矩形隧道结构动力响应分析  

Dynamic response of quasi-rectangular tunnel structure under metro train loads

作　　者：杜明芳[1] 杨晓晨 王倩[1] 张鹏 DU Ming-fang;YANG Xiao-chen;WANG Qian;ZHANG Peng(School of Civil Engineering,Henan University of Technology fZhengzhou 450001,China)

机构地区：[1]河南工业大学土木工程学院,河南郑州450001

出　　处：《河南城建学院学报》2023年第6期53-58,95,共7页Journal of Henan University of Urban Construction

摘　　要：为分析地铁列车荷载作用下类矩形隧道结构的动力响应特性,以郑州地铁8号线郑州东站类矩形盾构段为研究背景,使用MIDAS/GTS NX软件建立三维有限元分析模型,对单车运行与双车交会运行两种工况下类矩形隧道结构的动力响应进行计算分析,得到了类矩形隧道在地铁列车荷载作用下的动力响应规律。结果表明:地铁列车作用下产生的类矩形隧道结构的位移响应和应力响应均较小,隧道结构在地铁列车荷载的作用下是稳定的。地铁列车交会时最大位移发生在衬砌底部,为1.28 mm;在单车运行时,最大位移发生在衬砌行车侧右边,约为0.89 mm。在双车相向行驶时,隧道衬砌左侧的竖向应力响应大于隧道衬砌右侧,其增幅约为26.8%。因此,在地铁运营时期应多对隧道结构左侧行车线下方进行长期的变形监测,以避免在此处发生结构安全问题。To analyze the dynamic response characteristics of quasi-rectangular tunnel structure under metro train loads,taking the Zhengzhou East Station of Zhengzhou Metro Line 8 as the research background,a three-dimensional finite element analysis model was established using MIDAS/GTS NX finite element analysis software to calculate and analyze the dynamic response of quasi-rectangular tunnel structure under two operating conditions:single vehicle operation and two vehicle rendezvous operation.The dynamic response of the quasi-rectangular tunnel structure under the action of metro train loads is obtained.The results show that the displacement and stress responses of the quasi-rectangular tunnel structure are small and the tunnel structure is stable under the metro train loads.The maximum displacement will occur at the bottom of the lining when the metro trains meet,with a maximum displacement of 1.28 mm.In single vehicle operation,the maximum displacement occurs on the right side of the lining travel side,with a maximum displacement of approximately 0.89 mm;when the two vehicles are travelling in opposite directions,the vertical stress response on the left side of the tunnel lining is greater than that on the right side of the tunnel lining,and the maximum vertical stress value increases by approximately 26.8%.Therefore,more long-term deformation monitoring should be carried out under the left-hand travel lane of the tunnel structure during the metro′s operational period to avoid structural safety problems here.

关 键 词：动力响应 地铁列车荷载 数值模拟 单洞双线隧道 

分 类 号：U231[交通运输工程—道路与铁道工程]