检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:王纪龙 张继培 沈弘毅 赵博[2] WANG Ji-long;ZHANG Ji-pei;SHEN Hong-yi;ZHAO Bo(China Railway Sixth Group Tianjin Railway Construction Co.,Ltd.,300142,Tianjin,China;School of Civil Engineering,Tianjin University,300072,Tianjin,China)
机构地区:[1]中铁六局集团天津铁路建设有限公司,天津300142 [2]天津大学建筑工程学院,天津300072
出 处:《建筑技术》2025年第8期963-970,共8页Architecture Technology
基 金:天津市技术创新引导专项项目(23YDTPJC00220)。
摘 要:基于天津地铁4号线果园南道站顶管过街通道建设项目,对场地振动响应实测,同时利用ABAQUS有限元软件建立土体-地铁-地下通道结构三维简化模型,采用激振力函数和DLOAD子程序相结合的方式模拟地铁荷载作用全过程,对比研究了地铁与车辆荷载共同作用下地下过街通道对地表振动响应的影响规律。结果表明:所采用的地铁简化模型与有限元模拟方法可较准确地还原实际地铁荷载和振动传递过程,地面振动强度受地铁列车运行速度的影响较小。在地铁与车辆荷载共同作用下,考虑过街通道与不考虑过街通道两种工况在通道长度范围内Z振级整体上均随着与地铁隧道距离的增大而衰减,衰减率分别为12.8%和16.2%。由于过街通道对振动传播的阻隔作用,考虑过街通道各测点的Z振级均小于不考虑过街通道相应测点的Z振级,差值大小需综合考虑地铁荷载与车辆荷载距离衰减和过街通道阻隔的影响。Based on the pipe-jacking underpass construction project of Tianjin Metro Line 4,a field test was carried out to study the vibration response.A simplified three-dimensional finite element model of soil layer-metro line-underpass was established by ABAQUS at the meanwhile and an excitation force,and the DLOAD subroutine were utilized in combination to simulate the entire process of the metro load.Finally,the influence of underpass on surface vibration response under metro and vehicle loads was analyzed.The results show that the simplified model and the simulation method can accurately reproduce the metro load and the transmission process of the vibration.The speed of the metro has a small impact on the intensity of surface vibration.The Z vibration levels of the two conditions with and without the underpass under metro and vehicle loads attenuate as the distance from the metro tunnel increases,with an attenuation rate of 12.8%and 16.2%respectively.The Z vibration levels of the measure points under the condition with underpass are lower than those of the corresponding measure points under the condition without underpass because of the barrier effect of the underpass.The value of the difference needs to take both the distance attenuation and the barrier effect of the underpass into consideration.
关 键 词:地铁振动 过街通道 场地实测 激振力函数 Z振级
分 类 号:TU311.3[建筑科学—结构工程] U231[交通运输工程—道路与铁道工程]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.171