期刊论文

Seismic dynamic response characteristics of slope with double-arch tunnel under multiple factors

中文

振动工程学报

1004-4523

2020

33

6

1291-1301

10.16385/j.cnki.issn.1004-4523.2020.06.021

51204125:国家自然科学基金 51404309:国家自然科学基金 31971727:国家自然科学基金 2018JJ3882:湖南省自然科学基金 2020JJ4944:湖南省自然科学基金

本校为第一机构

为了研究含连拱隧道边坡地震动力响应特性,设计了一个几何相似比为1:20的含连拱隧道软弱围岩边坡,并完成了振动台试验.以峰值为0.4g-的汶川(WC)波、Kobe波和EL-Centro波(EL波)为激振波,探究了地震波类型和激振方向等多因素作用下含连拱隧道边坡地震动力响应特性.研究表明:(1)随着地震波类型、激振方向、测点位置等因素的变化,边坡加速度放大系数表现出明显的非线性放大趋势.(2)在地震波水平(X)向激振下边坡岩体主要产生水平向的地震响应,在竖直(Z)向激振下边坡岩体主要在竖直向产生地震响应;在双向(XZ)地震波激振下,加速度响应整体上由大到小依次是K-XZ＞WC-XZ＞EI--XZ.(3)竖直加速度放大系数在...

In order to study the seismic dynamic response characteristics of the slope with double-arch tunnel,a large-scale shaking table model test of the slope with multi-arch tunnel whose scale is 1∶20 is designed and finished.A series of tests is performed with different excitation direction seismic waves including Wenchuan(WC),Kobe and EL-Centro(EL)seismic waves whose peaks are 0.4 g.The influence of multiple factors including seismic wave type and excitation direction on the dynamic response of the slope with double-arch tunnel is discussed.The re...