HWIB用于高速铁路引发低频振动的隔振分析  

Isolation analysis of low-frequency vibration from high speed railways by using HWIB

作　　者：李志江[1] 何锃[1] 谭燕[1] 肖敬华[2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]湖北省交通规划设计院,湖北武汉430051

出　　处：《华中科技大学学报（自然科学版）》2011年第3期34-38,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10872075)

摘　　要：分析了实体波阻块(EWIB)和蜂窝状波阻块(HWIB)对高速铁路引发低频振动的隔振效果.首先建立了列车-桥墩-土体计算模型,将桥墩处的实测加速度转换为作用在土体表面的动力荷载;然后计算了空沟和地下连续墙的隔振效果,并与EWIB和HWIB的隔振效果进行了对比.结果表明:对于高速铁路运行产生的低频振动,EWIB可以使地表振级降低5～10dB,HWIB可使地表振级降低6～12dB;对于10Hz以内的低频振动,HWIB有更好的隔振效果,使振动幅值降低80%以上.Isolation effect of EWIB （entity wave impeding block） and HWIB （honeycomb wave impeding block） for low-frequency vibration induced by high speed railway were studied. The numerical calculation model of train-bridge pier-soil was established firstly, and actual observed acceleration of bridge pier was converted to dynamic load acting in the surface of the soil, then the isolation effect of open trench and continuous wall were calculated. The calculation of EWIB was compared with the one of HWIB. The results show that for low-frequency ground vibration induced by high speed railway loads, EWIB and HWIB can reduce vibration level of ground surface by 5-10 dB and 6-12 dB, respectively. Especially, for within 10 Hz low-frequency vibration, HWIB have the capacity to reduce vibration amplitude above 80%, and the isolation effect of HWIB is superior to three other kinds of isolation measures.

关 键 词：隔振 低频振动 高速铁路 实体波阻块 蜂窝状波阻块 空沟 连续墙 

分 类 号：TU312[建筑科学—结构工程]