地铁列车振动对颐和园北宫门古建筑木结构影响的实测与分析  

Measurement and analysis of the influence of metro train vibration on the ancient wooden structures of North Palace Gate of the Summer Palace

作　　者：巴振宁[1] 符瞻远 付继赛 马鸣昊 高愈辉 BA Zhen‑ning;FU Zhan‑yuan;FU Ji‑sai;MA Ming‑hao;GAO Yu‑hui(School of Civil Engineering,Tianjin University,Tianjin 300350,China;Tianjin International Engineering Institute,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学建筑工程学院,天津300350 [2]天津大学国际工程师学院,天津300072

出　　处：《振动工程学报》2023年第6期1602-1612,共11页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(52178495);嘉峪关世界文化遗产监测系统工程(二期)嘉峪关木构城楼现状结构分析与状态评估研究(JYGZCDL2017024G)。

摘　　要：针对地铁运行对木结构古建筑的影响这一问题,本文以颐和园北宫门和北京市地铁4号线为研究对象,采用ABAQUS建立了列车‑隧道‑土层‑木结构古建筑耦合模型。通过与现场实测结果对比,验证了有限元模型的精度,并系统地研究了地铁运行时地铁线路与古建筑之间的夹角、列车速度对木结构古建筑振动的影响。结果表明:场地地表与北宫门结构的振动强度的模拟结果与实测结果基本一致,实际工况下北宫门的振动响应满足限值要求;地铁线路与临近木结构古建筑长轴方向夹角为0°时,结构振动强度最大,且对于不同夹角,振动最强烈的均为距地铁线路最近的结构柱;随着列车速度的增大,木结构古建筑的振动强度显著增大,与车速60 km/h时相比,车速为80 km/h时结构的振动幅度增加了19.67%。Based on the existing circumstances that the North Palace Gate of the Summer Palace and Beijing Rail Transit Line 4,this paper mainly discusses the influence of metro train vibration on ancient wooden structures.A train-tunnel-soil layer-building coupled model is established by ABAQUS,and the accuracy of the model is validated by comparison with field measurements.Horizontal vibration intensities are analyzed and the effects of angle and distance between subway lines and buildings,train speed and tunnel depth on ancient wooden structures are summarized.The results show that the structural vibration intensity becomes largest when the subway line is coincident with the long axis of the ancient timber structure.The structural column closest to the subway line exhibits the strongest vibration for various angles.The vibration intensity of buildings increases significantly as the train speed increases,with the vibration amplitude increasing by 19.67%for 80 km/h in comparison to the case of 60 km/h.The embedded depth of the tunnel is suggested as deep as possible when the location of the subway line cannot be changed.

关 键 词：木结构古建筑 地铁列车 现场实测 有限元分析 振动影响 

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]