Upper bound quasi-static analysis of dynamic stability on shallow tunnel under earthquake action

被引：0

作者：

Zhang, Jiahua ^{[1
]}

Yang, Xiaoli ^{[1
]}

Zhang, Biao ^{[1
]}

机构：

[1] School of Civil Engineering, Central South University, Changsha

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2015年 / 46卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Horizontal earthquake; Quasi-static method; Upper bound theorem; Vertical earthquake;

D O I：

10.11817/j.issn.1672-7207.2015.01.032

中图分类号：

学科分类号：

摘要：

Based on two cases of non-bias and bias, from the view of energy, the influence on stability of shallow tunnels from horizontal and vertical earthquake force was studied using the quasi-static method. The results show that on static condition, the results calculated by the limit analysis method are very close to those obtained by the limit equilibrium method, which verifies the correctness of this method. With the increment of proportional coefficient of lateral pressure, vertical earth pressure declines while horizontal earth pressure increases, and break angle shows decreasing trend. Effect of asymmetric loads on the stability of shallow tunnels is less than that of proportional coefficient of lateral pressure. The earth pressure and break angle both increase with the increase of the horizontal seismic effect coefficient. With the increase of vertical seismic proportional coefficient, the earth pressure increases but the break angle decreases obviously. Therefore, vertical earthquake force, just like horizontal earthquake force, has significant effect on the stability of shallow tunnels, which can not be neglected in the design of support structures. ©, 2015, Central South University of Technology. All right reserved.

引用

页码：238 / 247

页数：9

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