期刊论文

Study on seismic response characteristics of slope with double-arch tunnel

中文

应用力学学报

1000-4939

2021

38

2

597-606

10.11776/cjam.38.02.c001

国家自然科学基金（51204125）； 湖南省自然科学基金（2018JJ3882;2020JJ4944）； 湖南省研究生科研创新项目（CX20190624）；

本校为第一机构

利用MIDAS GTS有限元软件建立一个含连拱隧道软弱围岩边坡模型,并利用振动台试验进行验证,探究了含连拱隧道边坡地震响应特性,分析了隧道的存在和隧道的位置对边坡动力响应特性的影响。得出以下主要结论:（1）边坡加速度放大系数沿坡高向上表现出非线性变化趋势,并表现出趋表效应。坡体底部测点卓越频率为7Hz,顶部测点卓越频率为4.8Hz,说明边坡削弱地震波高频段,放大低频段并改变其频谱成分。（2）含连拱隧道边坡加速度放大系数最大值为2.04,不含隧道边坡加速度放大系数最大值为1.88。含连拱隧道边坡加速度响应的非线性特征更明显,更不利于边坡稳定。连拱隧道的存在使得边坡受力不确定性增加,边...

In order to study the dynamic response characteristics of the soft surrounding rock slope with double-arch tunnel under earthquake, a numerical model of the soft surrounding rock slope of double-arch tunnel is established by using MIDAS GTS finite element software, and the validity of simulation is verified by shaking table test. At the same time, the influence of tunnel location and existence on dynamic response characteristics of slope is studied. The results show that, firstly, along the slope surface upward, with the increase of slope height, the acceleration amplification coefficient chan...