中文摘要：

以某大跨断面铁路车站隧道为研究对象，采用大型有限元分析软件ANSYS对隧道不同曲率的仰拱形式进行了地震反应分析。计算结果表明：大跨断面隧道的抗震性能较差；仰拱曲率变大，隧道结构受力减小，有利于隧道结构抗震；大跨断面隧道结构的薄弱环节主要出现在仰拱和右拱腰处。研究成果可作为大跨断面隧道抗震设计的参考依据。

英文摘要：

Taking a Iong span tunnel of a railway station as an inslanee, the paper analyses the seismic response of invert patternwith different curvature of tunnel by the finite element software ANSYS. The results indicates that the seismic behavior of tunnel with long span is rather poor, The structure stress of tunnel decreases with the curvature of the invert arch largen, which help to earthquake resistance of tunnel structures the weakness of long span tunnel is mainly at the top arch and the right arch side. The research could be considered as a reference for aseismic design of long span tunnel.