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时间:2020-04-05
《地下线路橡胶减振垫轨道减振性能研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第58卷第8期铁道标准设计Vo1.58No.82014年8月RAILWAYSTANDARDDESIGNAug.2014文章编号:1004—2954(2014)08~0044—04地下线路橡胶减振垫轨道减振性能研究赵留辉(中铁第一勘察院设计集团有限公司,西安710043)摘要:为了得到地下线路采用橡胶减振垫轨道的减振效果,建立车辆一轨道一隧道一土层一建筑物的三维有限元一无限元耦合模型,分别计算采用普通整体道床轨道和橡胶减振垫轨道2种工况下沿线建筑物的三向振动加速度振级。结果表明:列车运行引起的建筑物振动,以垂直于线路方向的横向振动为主,其次为垂向振动,平行
2、于线路方向的纵向振动最小;采用橡胶减振垫轨道后,楼柱节点的横向、纵向加速度振级明显减小,且随着距地面高度的增高。降幅基本一致,约为8.9dB;采用普通整体道床轨道和橡胶减振垫轨道时,楼板垂向振动规律基本一致,即随着楼层的增加,楼板垂向振动呈现先减后增的趋势,但是差别甚小。与普通整体道床轨道相比,橡胶减振垫轨道可以降低楼板垂向加速度振级约9dB。关键词:整体道床轨道;橡胶减振垫轨道;振动;减振效果中图分类号:U213.241文献标识码:ADOl:10.13238/j.issn.1004-2954.2014.08.010StudyonVibrationDam
3、pingPerformanceofUndergroundRailwayTrackwithRubberVibration-DampingPadZHA0Liu.hui(ChinaRailwayFirstSurveyandDesignInstituteGroupCo.,Ltd.,Xi’an710043,China)Abstract:Inordertoascertainthevibrationdampingeffectofundergroundrailwaytrackwithrubbervibration—dampingpad,athree—dimensiona
4、lfiniteelementandinfiniteelementcouplingmodelofvehicle-track-tunnel—soil—buildingsystemwasestablished。andthevibrationlevelsofthethree—directionvibrationaccelerationsofthebuildingalongtheundergroundrailwaywerecalculatedrespectivelyunderthetwoworkingconditions:thetrackwhichcamewith
5、ordinarymonolithictrackbedandthetrackwhichcamewithrubbervibration—dampingpad.Theresultsshowthat:(a)Amongthebuildingvibrationscausedbytrainrunning,thetransversevibrationperpendiculartothetrackdirectionisthedominantone,followedbytheverticalvibration,whilethelongitudinalvibrationpar
6、alleltothetrackdirectionisthesmallest.(b)Whenusingthetrackwithrubbervibration—dampingpad,thevibrationlevelsofthetransverseandlongitudinalaccelerationsofthecolumnnodesofthebuildingwillconsiderablydecrease;andthedecreasingwillbealmostthesamewiththeincreasingoftheheighttothegroundsu
7、rfaceandwillbeabout8.9dB.(C)Thebuildingfloorslabs’verticalvibrationpatternswhichareobtainedrespectivelybyusingthetrackwithordinarymonolithictrackbedandbyusingthetrackwithrubbervibration—dampingpad,arebasicallythesame;namely,thebuildingfloorslab’Sverticalvibrationswillpresentatren
8、dofdecreasingatfirstandthenincreasingast
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