摘要
随着城市地铁网络快速发展,地铁换乘车站结构复杂程度日益增加。尤其是车站与隧道连接处,其具有几何不规则的特点,地震作用响应复杂。目前对地下车站结构抗震的研究大都集中在车站标准断面,对地震作用下换乘车站连接部位研究较为有限。为揭示复杂换乘车站的地震响应特点,结合天津典型换乘车站-鼓楼站工程,采用Plaxis 3D有限元方法分析了鼓楼换乘站与隧道连接处的地震响应。分析中采用了考虑小应变区域内刚度变化的硬化土模型的土体动力本构模型,研究了连接处车站结构和隧道结构的内力响应特征和连接处内力影响范围,结果表明:端墙的存在降低了临近车站结构内力,影响范围约为0.85倍车站宽度;而端墙的存在使临近隧道内力增加,影响范围约为1.6倍隧道直径;车站底板与侧墙连接的部位是内力较大的部位。
With the development of urban subway network,the construction of subway transfer station is essential.However,due to the geometric irregularity of the subway transfer station,the earthquake response is complex.At present,the research on the earthquake resistance of underground structures mostly focuses on the standard section of the station,and there is limited research on the connection part of the subway transfer station under the earthquake.For revealing the characteristic of the seismic response of the subway transfer station,the Gulou station,a typical transfer station project in Tianjin,was analyzed by PLAXIS 3D finite element method to investigate the seismic behavior of typical transfer station.In the numerical calculation,the soil dynamic constitutive model of hardened soil model considering the change of stiffness in small strain region is adopted.The results show that the end wall can reduce the internal force of the station,and the influence range is about 0.85 times the width of the station;The end wall amplify the internal force of the tunnel,and the influence range is about 1.6 times the tunnel diameter;The connection between the station bottom plate and the side wall is the part with large internal force;The existence of the upper station has a certain adverse impact on the uniformity of the vertical deformation of the tunnel below.
作者
郭景琢
GUO Jingzhuo(China Construction Infrastructure Co.,Ltd.,Beijing 100029,China)
出处
《建筑结构》
北大核心
2023年第S02期779-785,共7页
Building Structure
基金
中建基础科技研发课题(CSCIC-2020-KT-(01))
中建股份科技研发计划(CSCEC-2021-Z-(25))。
关键词
换乘地铁车站
隧道
连接部位
地震响应
transfer subway station
tunnel
connection
seismic response
