期刊论文

中文

自然灾害学报

1004-4574

2016

25

5

158-166

10.13577/j.jnd.2016.0519

(51204215,51404309):国家自然科学基金项目 (Grant No,51204215,51404309):National Natural Science Foundation of China

本校为第一机构

基于动力模型相似理论,设计了一个尺寸为1∶10的偏压隧道模型进行大型振动台试验,研究模型分别在大瑞人工波、Kobe波和汶川波水平竖向双向激振条件下偏压隧道的加速度、动应变和围岩压力的动力响应特性。试验结果表明:偏压隧道竖向加速度响应与地震波、振幅和测点位置有关,且对激振加速度有放大效应,但随输入加速度峰值的增大而减小,受临空坡面放大效应的影响,同一高程靠近坡面的偏压侧放大系数大于非偏压侧(除拱脚外);水平向加速度响应主要与测点位置关系较大,受波形和振幅影响较小。衬砌在地震作用下主要承受拉应力,主应力随输入加速度峰值的增大而增大,非偏压拱脚主应变值最大是抗震设防的关...

Based on similar theory of dynamic model, a large-scale shaking table test of unsymmetrically loaded tunnel model with the scale of 1：10 was designed. In order to study seismic response characteristics of acceleration, dynamic strain and surrounding rock pressure of the model, Darui artifical wave, Wenchuan wave and Kobe wave were used to excite the model in X,Z directions. It shows that the vertical acceleration of the tunnel is related to seismic waveform, acceleration amplitude and measuring point＇s location and has an amplification effect...