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基于土—结构相互作用理论,对高烈度地震区跨断层破碎带公路隧道进行了抗震计算,分析得出了隧道结构各控制点的位移、加速度及应力响应的一般规律,同时分析了不同断层倾角对隧道纵向稳定性的影响。结果表明:在地震作用下,断层破碎带隧道拱部、墙脚为抗震薄弱位置;结构振动加速度波形与输入波形相似;断层倾角越小,隧道结构受力越不安全。这些结果可为地震区断层破碎带隧道结构设计提供参考。
Based on the theory of soil-structure interaction, the seismic calculation of highway tunnel with fault-broken zone in high-intensity earthquake area is carried out. The general laws of displacement, acceleration and stress response of each control point of tunnel structure are analyzed. Impact on Longitudinal Stability of Tunnels. The results show that under the earthquake, the arch and the foot of the tunnel in the fault fracture zone are weak anti-seismic positions. The vibration acceleration waveform of the structure is similar to the input waveform. The smaller the fault dip angle is, the less safe the tunnel structure is. These results can provide reference for the structural design of the tunnel in the earthquake zone.