北京工业职业技术学院学报

为进一步提升高烈度地震区穿越断层隧道的抗震性能，依托某水工隧道工程，利用有限差分数值分析软件FLAC 3D,研究了C25素混凝土、C35素混凝土和CF25钢纤维混凝土等不同材料的抗震效果。研究结果表明，与C25素混凝土相比，隧道二衬结构采用C35素混凝土和CF25钢纤维混凝土，竖向抗震效果和最小安全系数都有所提升；C35素混凝土的竖向抗震效果提高了33.784%,最小安全系数提升了32.562%～56.843%;CF25钢纤维混凝土的竖向抗震效果提高了31.194%,最小安全系数提升了31.636%～64.622%。综合考虑隧道竖向应变和最小安全系数指标，衬砌材料采用C35素混凝土，抗震效果最好。

To further improve the seismic performance of tunnels crossing faults in high-intensity seismic areas, this study relies on a hydraulic tunnel project and uses the finite difference numerical analysis software FLAC 3D to investigate the seismic resistance effects of different materials, including C25 plain concrete, C35 plain concrete, and CF25 steel fiber reinforced concrete. The research results show that compared with C25 plain concrete, the secondary lining structure of the tunnel using C35 plain concrete and CF25 steel fiber reinforced concrete has improved vertical seismic resistance effect and minimum safety factor. The vertical seismic resistance effect of C35 plain concrete is increased by 33.784%, and the minimum safety factor is enhanced by 32.562% to 56.843%. The vertical seismic resistance effect of CF25 steel fiber reinforced concrete is improved by 31.194%, and the minimum safety factor is increased by 31.636% to 64.622%. Comprehensive consideration of the tunnel vertical strain and minimum safety factor indicators shows that using C35 plain concrete as the lining material achieves the best seismic resistance effect.