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[1]WEI Xiaogang,LIU Huili,YANG Liuchuan,et al.Study on Seismic Dynamic Failure of the Rectangular Tunnel Structure[J].Journal of Seismological Research,2022,45(03):405-415.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0039 ]

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Study on Seismic Dynamic Failure of the Rectangular Tunnel Structure

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 45 Number of periods: 2022 03 Page number: 405-415 Column: 生命线工程系统抗震防灾专栏 Public date: 2022-06-20

Title:: Study on Seismic Dynamic Failure of the Rectangular Tunnel Structure

Author(s):: WEI Xiaogang¹; 2; LIU Huili¹; 3; YANG Liuchuan¹; 3; WANG Zhanyang⁴; LI Guanghui¹; LIU Shuxian⁵; FA Jingyu¹; (1.College of Civil Engineering and Architecture,Zhengzhou University of Aeronautics,Zhengzhou 450046,Henan,China)(2.Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,HeilongJiang,China)(3.Institute of Civil Engineering of Realization in Zhengzhou,Zhengzhou 450046,Henan,China)(4.Installation Engineering Co.,Ltd. of CSCEC 7th Division,Zhengzhou 450046,Henan,China)(5.College of Civil Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China)

Keywords:: rectangular tunnel structure; seismic action; finite element simulation; mechanical model

CLC:: P315.9

DOI:: 10.20015/j.cnki.ISSN1000-0666.2022.0039

Abstract:: In order to carry out an in-depth study of the law of the dynamic response of the tunnel structure under the action of seismic loads,and obtain the mechanism of the instability and failure of the tunnel structure,an overall mechanical model of the soil-tunnel structure interactions is established. Then a model experiment is conducted on a large indoor shaking table,and a numerical simulation by the Finite Element Method is done. In this way,the acceleration time history,the spectral characteristics,the displacement and earth pressure of the whole mechanical model of the soil-tunnel structure subjected to seismic loads are discussed. The study shows that the results from the shaking table experiment are consistent with the results from numerical simulation. The four corners of the tunnel structure bear the largest stress. With the increase of the peak acceleration of the mesa seismic wave input,the earth pressure increases gradually,and the middle part of the tunnel structure is most affected by earth pressure. The displacement of the bottom plate and the waist of the tunnel structure is the largest,which easily causes the dynamic instability of the tunnel structure.

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Last Update: 2022-07-01