【摘要】 论述隧道衬砌结构动力有限元分析的理论与数值计算方法,并以京广线朱亭隧道列车振动荷载现场测试成果为基础,通过对3种不同断面形状的隧道衬砌结构的动力响应特征进行分析研究,可获得隧道衬砌结构竖向位移、竖向加速度及各种内力时程曲线。研究成果对评价既有提速铁路隧道衬砌结构的动力稳定性和完善铁路隧道结构的设计理论具有一定的指导意义。更多还原

【Abstract】 A theory of dynamic FEM and a numerical method for the lining structure of tunnels are put forward.Based on in-situ measurement results of vibration loads for the train running on the Zhuting tunnel of Beijing—Guangzhou Line,the dynamic response characteristics for three types of tunnels with different cross-sections are investigated.And then,the distributing characteristics of the vertical displacements and internal forces are obtained for the lining structures of three types of tunnels.The research results have important denotation not only for the dynamic stability evaluation of tunnel structures for speeded railway but also for the tunnel design and construction of railway.更多还原