强地震作用下铁路隧道衬砌耐震性的研究  

An Investigation on Aseismic Behaviours of Railway Tunnel Lining During Earthquake

作　　者：邵根大[1] 骆文海[1] 李福庭 张瑞龙 

机构地区：[1]铁道部科学研究院

出　　处：《中国铁道科学》1992年第2期92-109,共18页China Railway Science

摘　　要：在综合分析模型试验和有限元数值计算结果的基础上得出如下结论:(1) 地震时地下结构及其周围地层组成的系统被激发振动,地层的振动性状在系统中起主导作用。(2) 在水平振动情况下,地层按剪切型振动。地层的变形可以用公式u(z)=Acos(πZ/2H)来描述。(3) 阀明了作用在隧道衬砌上的地震力的发生机理和特点。(4) 全面评价了锚杆的抗震作用。(5) 提供适当的柔度而不丧失承受静载的能力——这是设计具有技术经济效益的抗震隧道衬砌的基本原则。(6) 揭示了现有隧道衬砌结构的薄弱部位。Based on comprehensive analysis of the results obtained from model test and numerical calculation by the Finite Element Method (FEM) the following conclusions can be drawn:(1) During earthquake, the system consisting of underground structure and surrounding ground is excited. The vibration behaviour of the ground plays a leading role in the system.(2) In case of horizontal vibration, the mode of ground motion is of the shear type. The ground deformation may be described by formula u(Z)=Acos(πZ/2H).(3) The generating mechanizm and characteristics of the seismic loading on tunnel lining have been expounded.(4) The aseismic effect of rockbolts has all-sidedly evaluated.(5) Providing suitable flexibility without losing the capacity to carry static loads is the basic principle for design of aseismic tunnel lining with technical and economical benefits.(6) The weak portions in the existing tunnel lining structure have been revealed.

关 键 词：地震 铁路隧道 隧道衬砌 耐震性能 

分 类 号：U459.1[建筑科学—桥梁与隧道工程]