【摘要】 地铁隧道抗震研究是当今地震工程界重要的研究方向。对广州地铁四号线地铁隧道进行了地震响应非线性有限元分析。采用动力有限元数值分析方法,提出估算地铁隧道地震响应永久变形的有限元计算模型。通过动力有限元方法确定地铁隧道的残余变形量,将各个时刻重复通过计算所确定的残余位移累加得到地震作用后地铁隧道的永久变形量。通过分析地铁隧道的永久变形量确定地铁隧道地震响应稳定性,为地铁隧道地震稳定性分析提供了参考依据。更多还原

【Abstract】 The antiseismic research of subway tunnel is very important in earthquake engineering.In this paper,dynamic finite element method was used to analyze the seismic response in No.4 line of Guangzhou subway tunnel.Dynamic finite element method was presented for evaluating seismically-induced permanent deformation of subway tunnel.By using dynamic finite element the residual deformation of subway tunnel was estimated.The computed residual displacements of the tunnel for each time increments were accumulated and the accumulative displacements were the permanent deformation of the subway tunnel.By analyzing the permanent deformation of the subway tunnel the stability of the seismic response in the subway tunnel was confirmed.It presents a reference for seismic stability analysis of the subway tunnel.更多还原