Shaking table test and numerical simulation study on unsymmetrical loading tunnel model

被引：0
|
作者：
Chen J. [1 ,2 ]
Jiang X.-L. [1 ,2 ]
Zhu Z.-L. [1 ,2 ]
Lian P.-Y. [1 ,2 ]
机构：
[1] School of Civil Engineering and Mechanics, South Central University of Forestry and Technology, Changsha
[2] Institute of Geotechnical Engineering, South Central University of Forestry and Technology, Changsha
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2017年 / 30卷 / 04期
关键词：
MIDAS/NX numerical analysis; Seismic acceleration response; Shaking table test; Unsymmetrical loading tunnel;
D O I：
10.16385/j.cnki.issn.1004-4523.2017.04.018
中图分类号：
学科分类号：
摘要：
Based on the similar relationship of dynamic model test, a large-scale shaking table model test of a unsymmetrical loading tunnel model with the geometric scale of 1∶10 was performed to study the acceleration dynamic response under earthquake loads. Wenchuan seismic wave with three excitation directions including horizontal(X) direction, vertical(Z)direction and horizontal and vertical(XZ)direction were used as the excitation waves in the model test. Numerical simulation was carried out by MIDAS/NX finite element software and the results of numerical simulation and model test were contrasted analysis. The results show that acceleration time-history curve of measuring points are similar to the input seismic wave characteristics, excellent frequency range and Fourier spectrum value has increased. In X excitation, acceleration amplification effect is not obvious and amplification factor decreases with earthquake amplitudes increasing. The vertical seismic wave effects on dynamic response acceleration of lining significantly greater than horizontal seismic wave and acceleration amplification effect is more obvious. In XZ excitation, some of acceleration amplification factor of measuring points increase and others decrease comparing with one-direction wave. The vertical acceleration dynamic response of measuring points which are close to the slope are greater than others. The arch foot of unbias side and arch crown are the key of seismic design. The results of numerical simulation and model test have similar alteration trend and the numerical fitting degree is high. When Amax<0.2g, simulation result error is small, but error increases with the increase of input peak acceleration. © 2017, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：660 / 669
页数：9
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