摘要
为分析隧道-土-地表建筑相互作用体系在减震措施下的减震效果,建立三维有限元计算模型,采用时程分析法对该模型的动力响应进行分析。通过分析隧道和地表建筑的加速度、位移和应力响应,研究了单独设置隧道减震层(或基础减震层)时减震层厚度对该体系减震效果的影响,进而提出了新颖的联合减震方案,通过正交试验研究了不同因素对减震效果影响的主次关系。最后分析了联合减震措施在不同地震波下的减震效果。结果表明:(1)隧道减震层能显著减小隧道的应力以及加速度响应,但是减震层弹性模量过小会放大隧道的位移响应;(2)当基础减震层埋深为0 m时减震效果最佳,能显著减小地表建筑相对位移;(3)在不同地震波作用下设置联合减震措施能达到良好的减震效果,同时,其减震效果优于单一减震层。
A 3D finite element calculation model was established to analyze the shock absorption effect of shock absorption measures taken for the tunnel-soil-surface building interaction system,and the time-history analysis method was adopted to analyze the dynamic response of this model.Based on the analysis of the acceleration,displacement and stress responses of tunnels and surface buildings,the impact of the thickness of shock absorption layer on the shock absorption effect of this system was studied when the tunnel shock absorption layer(or foundation shock absorption layer)was independently set.In addition,a novel scheme of combined shock absorption was put forward,and the primary and secondary relationship of different factors in terms of the impact on shock absorption effects was studied through orthogonal test.Finally,the shock absorption effects of these combined shock absorption measures were analyzed under different seismic waves.The results showed that(1)the shock absorption layer of a tunnel could significantly reduce the stress and acceleration of the tunnel,but if the elastic modulus of the shock absorption layer was too small,the tunnel displacement response would be enlarged;(2)when the depth of the foundation shock absorption layer was 0 m,the best shock absorption effect would be obtained and the relative displacements of surface buildings could be significantly decreased;and(3)the combined shock absorption measures taken under different seismic waves could realize a good shock absorption effect,and meanwhile,such shock absorption effect was superior to that of the single shock absorption layer.
作者
谢军
段龙
梁金晓
李延涛
宗金辉
XIE Jun;DUAN Long;LIANG Jinxiao;LI Yantao;SONG Jinhui(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300400;School of Civil Engineering,Hebei University of Architecture,Zhangjiakou 075000;Hebei Provincial Technology Innovation Center for Transportation Infrastructure Engineering in Cold Regions,Zhangjiakou 075000)
出处
《现代隧道技术》
CSCD
北大核心
2022年第3期136-145,共10页
Modern Tunnelling Technology
基金
河北省科技攻关计划项目(16275406D).
关键词
联合减震
正交试验
相互作用体系
地震响应分析
Combined shock absorption
Orthogonal test
Interaction system
Seismic response analysis
