摘要
为研究地铁隧道的真实抗震性能,基于常州软土地区场地特征参数,采用随机地震动模型合成随机地震波,应用有限元ABAQUS软件进行了双洞平行隧道非一致随机地震动激励下的动力响应分析。结果表明:非一致随机地震动激励下,双洞平行隧道纵向峰值位移响应呈先减小后增大趋势,且隧道之间相互作用明显,右线内力响应更为剧烈,隧道结构拱底和拱腰易出现应力集中。在实际地铁隧道建设中,应控制隧道净距、加强管片整体刚度等措施以提高非一致地震动激励下的抗剪切能力,确保隧道安全。
Based on the characteristic parameters of Changzhou soft soil area,the random ground motion model is used to synthesize random ground wave and the finite element ABAQUS software is applied to conduct the dynamic response analysis of the double parallel tunnel under non-uniform random ground motion excitation.The results show that,under non-uniformly random ground motion excitation,the displacement response of the tunnel with two parallel tunnels decreases first and then increases and the interaction between the two tunnels is obvious,the right line has a larger internal force response and the stress concentration easily occurs in the bottom and arch of tunnel structure.In the actual subway tunnel construction,it is necessary to control the tunnel net spacing or strengthen the segment stiffness to improve the shear capacity and ensure tunnel safety.
作者
冯晓九
李其成
丁琪
杨兆
许桦楠
FENG Xiaojiu ;LI Qicheng ;DING Qi ;YANG Zhao ;XU Huanan(School of Environmental and Safety Engineering, Changzhou University Changzhou,Jiangsu 213000)
出处
《工业安全与环保》
2018年第3期8-12,共5页
Industrial Safety and Environmental Protection
基金
江苏省政策引导类计划(产学研合作)-前瞻性联合研究项目(BY2015027-15)
关键词
随机地震动
非一致地震激励
双洞平行隧道
动力响应
random ground motion
non-uniform seismic excitation
double hole parallel tunnel
dynamic response