Ground Vibration Caused by Moving Metro Trains
-
摘要: 为了研究地铁列车引起的地面振动,将轨道、隧道结构和列车荷载简化后建立三维有限元动力分析模型.列车按8节车辆编组,以80 km/h的速度运行.计算了列车引起的地面振动,以分析隧道地基弹性模量和隧道埋深对地面振动响应的影响.结果表明:列车通过时,地面的竖向振动普遍比横向振动大;在靠近线路中心的区域,竖向振动随到线路距离的增加很快衰减;地面的横向振动有时比竖向的大,计算时不应忽略;地面振动强度和传播范围随地基弹性模量和埋深增加而减小.Abstract: To study ground vibrations caused by metro trains,a three-dimensional dynamic finite element model was derived with simplifications in tracks,tunnels and loads caused by a running train.A train was composed of 8 cars,and its speed was 80 km/h.The ground vibrations were calculated to analyze the influences of elastic modulus of soils and the burial depth of tunnels.Results show that vertical ground vibrations are generally greater than the lateral vibrations in the area vicinity to the central line of the railway,and decrease rapidly with an increase in the distance to the central line.However lateral vibrations of ground may be greater than vertical vibrations, so they should not be neglected in calculation.Ground vibrations decrease as the soil elastic modulus and the burial depth of tunnels increase.
-
Key words:
- subway /
- FEM /
- burial depth /
- ground vibration
-
XIA H,ZHANG N,CAO Y M.Experimental study of train-induced vibrations of environments and buildings[J].Journal of Sound and Vibration,2005,23(3):1 017-1 029.[2] 闫维明,张祎,任珉,等.地铁运营诱发振动实测及传播规律[J].北京工业大学学报,2006,32(2):149-153.YAN Weiming,ZHANG Yi,REN Min.In situ experiment and analysis of environmental vibration induced by urban subway transit[J].Journal of Beijing University of Technology,2006,32(2):149-153.[3] 王逢朝,夏禾,张鸿儒.地铁列车振动对邻近建筑物的影响[J].北方交通大学学报,1999,23(5):45-48.WANG Fengehao,XIA He,ZHANG Hongru,Vibration effects of subway trains on surrounding buildings[J].Journal of Northern Jiaotong University,1999,23(5):45-48.[4] 村田修,伊藤和也,神田政幸.振勤遮断工の防振劾果に関するパラメ一タスタデイ[J].铁道综研报告,2001,15(10):39-44.[5] 谢伟平,孙洪刚.地铁运行时引起的土的波动分析[J].岩土力学与工程学报,2003,22(7):1 180-1 184.XIE Weiping,SUN Honggang.FEM analysis on wave propagation in soils induced by high speed train loads[J].Chinese Journal of Rock Meehanice and Engineering,1999,23(5):45-48.[6] Andersen L,Jones C C.Coupled boundary and finite element analysis of vibration from railway tunnels-a comparison of two-and three-dimensional models[J].Journal of Sound and Vibration,2006,293(3):611-625.[7] 潘昌实.隧道力学数值方法[M].北京:中国铁道出版社,1995:165-193.[8] JU S H.Finite element analysis of structure-borne vibration from high-speed train[J].Soil Dynamics and Earthquake Engineering,2007,27 (3):259-273.[9] 刘晶波,谷音,李彬.结构-地基开放系统动力相互作用问题的高效解法[J].土木工程学报,2006,39(5):113-121.LIU Jingho,GU Yin,LI Bin.An efficient method for the dynamic interaction of open structure-foundation systems[J].China Civil Engineering Journal,2006,39(5):113-121.[10] 夏禾,张楠.车辆与结构动力相互作用[M].北京:科学出版社,2005:363-414.[11] 辜小安,任京芳,刘扬,等.我国地铁环境振动现状及控制措施[J].铁道劳动安全卫生与环保,2003,30(5):206-208.GU Xiaoan,REN Jingfang,LIU Yang,et al.The status quo of Environment vibration level and control measures of subwaysin China[J].Railway Occupational Safety,Health and Environment Protection,2003,30(5):206-208.
点击查看大图
计量
- 文章访问数: 2011
- HTML全文浏览量: 82
- PDF下载量: 617
- 被引次数: 0