地铁列车振动对高梁古桥影响分析  

Analysis of the Effect of Metro Train Induced Vibration on Gaoliang Ancient Bridge

作　　者：王宇 马蒙[1] 李万博 WANG Yu;MA Meng;LI Wanbo(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《噪声与振动控制》2025年第2期197-203,共7页Noise and Vibration Control

摘　　要：以北京地铁13号线扩能提升工程新建区间隧道近距离下穿高梁古桥为背景,对高梁古桥现况环境振动进行测试分析,建立隧道-地层-桥梁三维耦合有限元模型预测地铁开通运营后的振动影响,考虑路面交通与地铁列车运行共同作用下的振动响应。研究表明:现场测试得到古桥前3阶自振频率分别为9.5、10.1和10.7 Hz;现况交通环境下振动速度峰值满足标准0.20 mm/s限值,表明目前交通环境振动下古桥的安全性和完整性良好。预测得到新建地铁双线同时通行时对桥梁振动影响最大,最大振动速度为0.141 mm/s;叠加现况路面交通振动后,最大振动速度为0.137mm/s,均小于限值0.20 mm/s,即未来新建地铁线路开通后复杂交通荷载引起的振动响应不会对古桥安全性和完整性造成影响。Based on the project of a new section tunnel which was designed for the capacity expansion and project upgrading of Beijing Metro Line 13 to pass through the Gaoliang ancient bridge underneath,the current environmental vibration of the bridge was tested and analyzed.A three-dimensional finite element(FE)model of tunnel–soil–bridge was established to predict the vibration induced by metro operation.The vibration superposition of metro trains and road traffic effects were considered.The measured results indicate that the first three natural frequencies of Gaoliang bridge are 9.5,10.1 and 10.7 Hz respectively.The peak particle velocity(PPV)under the current traffic environment is below the guideline limit of 0.20 mm/s,which means that the current traffic environment vibration has no influence on the safety and integrity of the bridge.The calculation results show that the influence of superposition effect causes the largest vibration responses,i.e.a PPV of 0.141 mm/s.After superimposing the current road traffic vibration,the PPV is 0.137 mm/s,below the guideline limit of 0.20 mm/s,which indicates that the vibration response caused by complex traffic loads after the opening of new metro lines in the future will not affect the safety and integrity of the ancient bridge.

关 键 词：环境振动 地铁 古建筑 振动响应 现场测试 振动预测 有限元分析 

分 类 号：TB533.2[理学—物理] U231[理学—声学]