摘要
为了探讨橡胶减震层的减震效果,按照几何相似比为1∶20制作了一组隧道模型,基于振动台试验,分析了浅埋偏压隧道的加速度响应规律和橡胶减震层的减震效果。试验结果表明:橡胶减震层不能改变隧道受地震作用的加速度总体响应趋势,只能发挥减震吸能的效果减轻围岩对隧道结构的部分动力作用,从而提高隧道结构的抗震能力;橡胶减震层对隧道地震加速度的影响与地震波作用方向有关;橡胶减震层的减震效果受激振强度影响较为显著,低强度激振时其减震效果要优于高强度激振。
In order to explore the damping effect of rubber damping layer,a group of tunnel models are made according to the geometric similarity ratio of 1:20.Based on shaking table test,the acceleration response law of shallow buried bias pressure tunnel and the damping effect of rubber damping layer are analyzed.Test results show that,firstly,the rubber damping layer cannot change the overall response trend of the acceleration of the tunnel subjected to seismic action,but can only play the role of energy absorption,reduce the partial dynamic effect of surrounding rock on the tunnel structure,so as to improve the seismic capacity of the tunnel structure.Secondly,effect of rubber damping layer on seismic acceleration of tunnel is related to the action direction of seismic wave.Finally,the damping effect of rubber damping layer is significantly affected by the excitation intensity,and the damping effect of low-intensity excitation is better than that of high-strength excitation.
作者
赵富发
江学良
杨慧
张继琪
孙广臣
Zhao Fufa;Jiang Xueliang;Yang Hui;Zhang Jiqi;Sun Guangchen(School of Civil Engineering,Central South University of Forestry and Technology,410004,Changsha,China;Institute of Geotechnical Engineering,Central South University of Forestry and Technology,410004,Changsha,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2021年第4期1622-1628,共7页
Chinese Journal of Applied Mechanics
基金
国家自然科学家基金项目(51204125,51404309)
湖南省自然科学基金(2018JJ3882,2020JJ4944)
2019年湖南省研究生科研创新项目(CX20190624)。
关键词
浅埋偏压隧道
振动台试验
橡胶减震层
加速度响应规律
shallow bias tunnel
shaking table test
rubber shock absorber
acceleration response rules
