Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental Investigation

Composite lining is often designed for the mountainous tunnels in high-intensity earthquake areas. The application of the buffer layer will bring more advantages, while the shock-absorbing mechanism is still unclear currently. In this paper, based on the Fourier-Bessel series expansion method, the d...

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Main Authors: Kaixiang Fan, Yusheng Shen, Shuaishuai Wang, Bo Gao, Qing Zheng, Gaoming Yan, Peng Min
Format: Article
Language:English
Published: Hindawi Limited 2020-01-01
Series:Mathematical Problems in Engineering
Online Access:http://dx.doi.org/10.1155/2020/5453138
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spelling doaj-c359653c25d4443eb4025baf8fc8d1dd2020-12-07T09:08:28ZengHindawi LimitedMathematical Problems in Engineering1024-123X1563-51472020-01-01202010.1155/2020/54531385453138Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental InvestigationKaixiang Fan0Yusheng Shen1Shuaishuai Wang2Bo Gao3Qing Zheng4Gaoming Yan5Peng Min6Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaComposite lining is often designed for the mountainous tunnels in high-intensity earthquake areas. The application of the buffer layer will bring more advantages, while the shock-absorbing mechanism is still unclear currently. In this paper, based on the Fourier-Bessel series expansion method, the dynamic stress concentration factor of composite lining tunnel with buffer layer subjected to plane SV waves in the half-space is obtained. Then, the influence of geometric and mechanical parameters of the buffer layer on composite lining was systematically analyzed. Finally, the correctness of the analytical solutions is verified by series shaking table tests and numerical simulations. Results suggest that the buffer layer can play the role of “redistributing” the seismic load, and it can effectively reduce the dynamic responses of secondary lining but amplify in primary support. There is an optimal interval of the stiffness and thickness for the buffer layer. When the stiffness ratio of the buffer layer to surrounding rock is 1/10 ∼ 1/50 or the ratio of buffer layer thickness to inner diameters of secondary lining is 1/40 ∼ 1/20, the shock-absorbing performance is remarkable. The general damage observations in tests show that the crown, arch springing, and invert of composite lining in case of no buffer layer are prone to cracking under a strong earthquake. The invert of the composite lining is more susceptible to be damaged after adopting the buffer layer. In general, the analytical results were consistent with experimental and numerical results. The above study results may provide theoretical support and experimental data for the seismic design of composite lining tunnels.http://dx.doi.org/10.1155/2020/5453138
collection DOAJ
language English
format Article
sources DOAJ
author Kaixiang Fan
Yusheng Shen
Shuaishuai Wang
Bo Gao
Qing Zheng
Gaoming Yan
Peng Min
spellingShingle Kaixiang Fan
Yusheng Shen
Shuaishuai Wang
Bo Gao
Qing Zheng
Gaoming Yan
Peng Min
Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental Investigation
Mathematical Problems in Engineering
author_facet Kaixiang Fan
Yusheng Shen
Shuaishuai Wang
Bo Gao
Qing Zheng
Gaoming Yan
Peng Min
author_sort Kaixiang Fan
title Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental Investigation
title_short Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental Investigation
title_full Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental Investigation
title_fullStr Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental Investigation
title_full_unstemmed Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental Investigation
title_sort dynamic response of composite lining tunnel with buffer layer: an analytical and experimental investigation
publisher Hindawi Limited
series Mathematical Problems in Engineering
issn 1024-123X
1563-5147
publishDate 2020-01-01
description Composite lining is often designed for the mountainous tunnels in high-intensity earthquake areas. The application of the buffer layer will bring more advantages, while the shock-absorbing mechanism is still unclear currently. In this paper, based on the Fourier-Bessel series expansion method, the dynamic stress concentration factor of composite lining tunnel with buffer layer subjected to plane SV waves in the half-space is obtained. Then, the influence of geometric and mechanical parameters of the buffer layer on composite lining was systematically analyzed. Finally, the correctness of the analytical solutions is verified by series shaking table tests and numerical simulations. Results suggest that the buffer layer can play the role of “redistributing” the seismic load, and it can effectively reduce the dynamic responses of secondary lining but amplify in primary support. There is an optimal interval of the stiffness and thickness for the buffer layer. When the stiffness ratio of the buffer layer to surrounding rock is 1/10 ∼ 1/50 or the ratio of buffer layer thickness to inner diameters of secondary lining is 1/40 ∼ 1/20, the shock-absorbing performance is remarkable. The general damage observations in tests show that the crown, arch springing, and invert of composite lining in case of no buffer layer are prone to cracking under a strong earthquake. The invert of the composite lining is more susceptible to be damaged after adopting the buffer layer. In general, the analytical results were consistent with experimental and numerical results. The above study results may provide theoretical support and experimental data for the seismic design of composite lining tunnels.
url http://dx.doi.org/10.1155/2020/5453138
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