摘要
首先通过现场测试的方法对铁路线附近建筑物的振动特性、建筑物振动的传播规律及其影响因素进行了研究,然后建立了列车-大地-隔振沟-建筑物耦合动力分析模型,对隔振沟的沟深、沟长、沟到建筑物的距离和填充材料等四种结构参数对隔振效果的影响进行了分析。结果表明:列车引发的建筑物振动属于低频振动,建筑物结构对高频振动具有衰减的作用;振动随列车速度的提升而增大,随列车编组的加长而增大,随列车轴重的增加而增大;建筑物的振动水平随楼层的上升呈曲折分布;隔振沟的沟深、沟长、沟与建筑物之间的距离以及填充材料的变化对建筑物楼板的振动都有比较大的影响。
Firstly, using field testing, the vibration characteristics of the buildings, waves-propagation laws and influencing factors of structural vibrations nearby the track-line induced by moving trains are studied. Then, the train-ground-trench and barrier-building coupled dynamic model is established to analyze the influences of four structural parameters, such as the trench depth, the trench length, the distance from the trench to the building and the filled-in materials, on the effect of isolation of the train-induced vibrations. The results show that the structural vibration induced by moving trains is low-frequency vibration; and the structures have attenuating functions to the high-frequency vibrations. Higher train speed, longer length of the train, and heavier load will induce larger structural vibrations. The increase of structural vibration level shows zigzag tendencies with the increase in floor elevation. The changes of trench depth, the trench length, the distance from the trench to the building and the filled-in materials have large influence on the vibration isolation effect.
出处
《噪声与振动控制》
CSCD
北大核心
2009年第5期80-86,95,共8页
Noise and Vibration Control
基金
国家973计划(2007CB16607)
国家自然科学基金(50568002)
关键词
振动与波
列车
建筑物振动
隔振沟
vibration and wave
trains
structure vibrations
trench barrier
