地铁运行引起的临近桥梁结构振动分析

1)大连海事大学土木工程系,辽宁大连 116026; 2)大连海事大学安全工程系,辽宁大连 116026; 3)大连海洋大学海洋与土木工程学院,辽宁大连 116023

结构工程; 地铁列车; 地铁隧道; 公路桥梁; ABAQUS; 数值分析; 列车振动荷载

Vibration of the existing bridge structure induced by metro train operation
MENG Kun1, CUI Chunyi1, XU Minze1, WANG Qifu2, and SU Jian3

1)Department of Civil Engineering, Dalian Maritime University, Dalian 116026,Liaoning Province, P.R.China2)Department of Safety Engineering, Dalian Maritime University, Dalian 116026, Liaoning Province, P.R.China3)College of Ocean and Civil Engineering, Dalian Ocean University, Dalian 116023, Liaoning Province, P.R.China

structural engineering; subway train; metro tunnel; highway bridge; ABAQUS; numerical analysis; train vibration load

DOI: 10.3724/SP.J.1249.2020.06610

备注

为研究地铁列车运行引起的环境振动对临近既有公路桥梁结构的影响,基于大型有限元计算平台ABAQUS,采用精细化建模方法,建立地铁隧道-地基-既有桥梁的大规模三维数值计算模型,通过列车-轨道-隧道结构系统力学简化模型,计算得到列车振动荷载,对桥梁结构在列车通行振动荷载作用下的受力及变形进行分析. 结果表明,在列车通行过程中,公路桥梁结构构件均存在明显的振动,但未发生扩散性共振效应,振动幅值很小; 在桥梁结构地震荷载与列车振动作用组合中,列车振动作用效应可忽略.

In order to study the influence of environmental vibration induced by metro train operation on existing highway bridges, a three-dimensional numerical calculation model of metro tunnel-foundation-existing bridge is established based on ABAQUS, a large-scale finite element calculation platform. Then, the train-track-tunnel structure system is established to calculate the train vibration load. On this basis, the force and deformation of bridge structure under vibration load caused by train are analyzed, respectively. The calculation results show that during the train passage, there are obvious vibration effects in bridge structural components, but there is no diffusive resonance effect, and the vibration amplitude is very small. In the combination of seismic load of bridge structure and train vibration, the effect of train vibration can be completely neglected. The results can provide reference for engineering analysis and practice.

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