作　　者： ; ; ; ;

机构地区： 淡江大学

出　　处： 《应用力学学报》 2013年第3期463-468,482,共6页

摘　　要： 为了研究城市道路诱发的环境振动问题,首先对某城市道路交通引起的周围建筑结构振动进行现场实测,并对实测数据进行峰值、功率谱、加速度振级分析,然后建立实测建筑结构的有限元模型,最后分析总结出城市道路环境振动对建筑物的影响及其在结构中的传播规律。实测分析表明:各种交通振源诱发的环境振动的频率范围不同,对于一些对环境振动敏感的特殊建筑,在进行结构振动设计时应综合考虑结构所在地环境振动特点和结构自身动力特性,以满足分频限值评价标准的要求,除考虑竖向环境振动外,还需考虑水平向;有限元分析结果能够给出振动在结构内的传播规律,可用于对结构受环境振动影响的定性分析和敏感性分析;实测和数值分析结果表明:不论是加速峰值还是加速度振级,竖向幅值均随楼层的增加而单调增加,但水平向幅值并不随楼层的增加而单调增加。 To study increasingly severe vibrations induced by urban traffic,the aim of this paper is to study the environmental vibration effects on the adjacent buildings and propagation of vibration in structure.First,field tests of building vibration are carried out nearby an urban road.Then,based on the test data,the peak value,the power spectrum density(PSD),and vibration level are analyzed.Meanwhile,the finite element model of the tested building is established for the analysis.Tests show that the dominant frequencies of power spectrum induced by different vibration source are distinct,including urban road,railway,high-speed railroad,urban rail traffic,urban subway traffic,etc.For some buildings which are very sensitive to vibration,it is not enough just considering the vertical vibration in buildings.The properties of vibration wave and structure should be considered to satisfy the demand of national norms for the design of structure near the vibration source.The distribution characteristics of environmental vibration inside building can be displayed from the finite element analysis which is used as a method for qualitative analysis.Inside multi-story building,both of the test result and the finite element analysis result show that the vertical vibration monotonously is amplified with the rise of floor;however,this is not true for horizontal vibration.The vertical vibration is stronger than the horizontal one.

关 键 词： 交通工程 城市道路 环境振动 功率谱 振级 有限元

领　　域： [建筑科学]