不同方向地震波作用下单舱管廊抗震性能分析

Seismic performance analysis of single-chamber tunnel under different directions of seismic wave

利用时程分析法,基于有限元计算方法对砂土地区单舱管廊结构进行横向、竖向、纵向抗震计算,分析了在不同方向地震波输入下单舱管廊的受力响应特征。分析结果表明,在不同方向地震波输入下单舱管廊具有不同的破坏程度,其中对砂土地区单舱管廊影响较大的地震波是横向地震波。同时可以得出,单舱管廊结构在地震波作用下角点处易发生破坏。

In this paper, time history analysis method is used to calculate the lateral, vertical and longitudinal seismic resistance of the single-chamber tunnel in the sandy area based on finite element method. This paper analyzes the stress response characteristics of the single-chamber tunnel under different directions of seismic wave. The analysis results show that the single-chamber tunnel has different degree of destruction in different directions of seismic wave, lateral seismic wave has the greatest impact on the single-chamber tunnel. At the same time, it can be con-cluded that the comer of single-chamber tunnel is easy to be destroyed under seismic wave.