摘要
兰州轨道交通1号线工程侧穿金天观保护区,鉴于列车运营引起的振动会对保护区中老子殿木结构产生潜在的影响,通过三维有限元数值模拟对其进行动态综合研究,以确定是否需要采取相应的措施进行保护,确保地铁运营过程中老子殿的安全。结果表明:列车轨道采用普通短枕式整体道床,列车速度为60 km/h时,满足控制标准要求,可不采取减振措施;老子殿木结构顶层水平振动较柱基础水平振动有所放大,且木结构的水平振动速度在X(沿隧道轴线)与Y(垂直于隧道轴线)两个方向的差别较大。最后提出建议控制列车最大速度不大于60 km/h,并采取中等减振措施。
The underground project of Lanzhou No.1 rail traffic line passes through Jintian Temple protection area sidely.In view of the vibration effects created by train operations,a dynamic comprehensive study was conducted by 3D finite element numerical simulation method to verify the necessity for taking protection measures,so as to ensure the safety of Laozi Hall＇s wooden structures.The results show that the overall track bed of ordinary short pillow under the condition of train speed of 60 miles per hour could meet control standards,and there is no necessity to take vibration reduction measures.Simultaneously,contrasted to column basis,the horizontal vibration of the top level of Laozi Hall＇s wooden structures is magnified a little.the parallel component and vertical component of horizontal vibration velocity are also distinct.Besides,the maximum train speed of 60 miles per hour and the medium vibration reduction measures are proposed.
出处
《水利与建筑工程学报》
2012年第6期83-86,142,共5页
Journal of Water Resources and Architectural Engineering
关键词
数值分析
木结构
列车运行
水平振动
numerical analysis
wooden structure
train running
horizontal vibration
