The fault-crossing tunnel in meizoseismal area is directly subjected to strong ground motion, which leads to the failure of the tunnel lining. In order to improve the seismic safety of tunnel, fiber-reinforced concrete is applied to tunnel lining in this article. Taking the section of Zhongyi tunnel crossing Wanlong fault as an example, seismic performance of fiber-reinforced concrete tunnel lining was studied by finite difference numerical calculation software FLAC3D. The seismic displacement, stress response, and side wall convergence of secondary lining structures which are plain concrete, steel fiber-reinforced concrete, and steel-basalt hybrid fiber-reinforced concrete were comparatively analyzed. Moreover, the safety factor of each lining structure was investigated with the present numerical model. With the obtained data, seismic performance of steel-basalt hybrid fiber-reinforced concrete secondary lining is better than that of steel fiber-reinforced concrete secondary lining. The results may provide references for seismic design of fault-crossing tunnels in meizoseismal area.

中等地震区的断层隧道直接受到强烈的地震动，从而导致隧道衬砌的破坏。为了提高隧道的地震安全性，本文在隧道衬砌中采用了纤维混凝土。以中益隧道穿越万隆断层的断面为例，利用有限差分数值计算软件FLAC3D研究了纤维混凝土隧道衬砌的抗震性能。比较分析了普通混凝土，钢纤维增强混凝土和钢-玄武岩混合纤维增强混凝土的二次衬砌结构的地震位移，应力响应和侧壁收敛性。此外，利用目前的数值模型研究了每种衬砌结构的安全系数。利用获得的数据，钢-玄武岩混杂纤维增强混凝土次衬的抗震性能优于钢纤维增强混凝土次衬。研究结果可为中震地区断层隧道的抗震设计提供参考。