行驶列车引起的周边建筑物振动分析

DYNAMIC ANALYSIS OF BUILDING VIBRATION INDUCED BY TRAIN ALONG RAILWAYS

随着城市化的加速,铁路周边等有振动影响的区域也出现了高层建筑,轨道交通系统对大都市生活环境和工作环境的振动影响,越来越多地引起公众的强烈反应。结合工程实际,对铁路附近———拟建场地进行振动数据采样,并将测得的地面加速度作为对拟建建筑物的激励。拟建建筑物是从低到高的典型的钢筋混凝土框架结构。根据计算结果,对拟建建筑物在激励下的动力响应的特点进行了讨论。最后将数值结果与允许振动标准作出比较,得出了一些列车经过对附近建筑物振动影响的规律。

Due to rapid urbanization,more tall buildings are constructed closer to railways than they used to be.Reports with regard to vibration felt by building occupants caused by pile-driving have been filed more and more frequently in metropolitan cities around the world.Based on project reality,train-induced ground vibration are measured.Their(charac)teristics are discussed.Responses of five hypothetical reinforced concrete structures subjected to field measured ground motions due to passing train are analyzed.Results are compared with specifications of allowable vibration levels.Effects of train-induced ground motions on safety of building structures adjacent to railways,on human being and on(normal) operations of sensitive equipments housed in those buildings are discussed.