Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States
Cracks and other diseases may occur in the long-term operation of highway tunnels and reduce the structural load-carrying capacity. Strengthening using carbon fiber reinforced polymer (CFRP) sheets and other materials could extend the service time of the tunnels. However, the process of strengthenin...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/6665996 |
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| _version_ | 1849395975030833152 |
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| author | Xuezeng Liu Yunlong Sang Shuang Ding Guiliang You Wenxuan Zhu Ruoyang Zhou Qiang Wei Liang Jiang |
| author_facet | Xuezeng Liu Yunlong Sang Shuang Ding Guiliang You Wenxuan Zhu Ruoyang Zhou Qiang Wei Liang Jiang |
| author_sort | Xuezeng Liu |
| collection | DOAJ |
| description | Cracks and other diseases may occur in the long-term operation of highway tunnels and reduce the structural load-carrying capacity. Strengthening using carbon fiber reinforced polymer (CFRP) sheets and other materials could extend the service time of the tunnels. However, the process of strengthening tunnels is remarkably different from the process of strengthening aboveground structures because of the secondary load. In order to understand the development of stress and deformation of strengthened tunnels under secondary load, a 1 : 10 scaled model was tested to simulate the tunnel strengthened with CFRP under different damage states. The test results show that CFRP strengthening improved the stiffness of the structure and inhibited the propagation of the existing cracks. The peeling of the CFRP sheets made the strengthened structure quickly lose its load-carrying capacity, causing the instability of the structure. The failure loads of the structures strengthened at different damage states were essentially the same, with an average value of 184% of the original failure load. Nevertheless, the early strengthening helped control the structural deformation. The test results also demonstrate that the bonding strength between the CFRP and the lining is essential for strengthening effectiveness. This study provides a theoretical basis for similar engineering reinforcement designs. |
| format | Article |
| id | doaj-art-b5128d8b05704b76a46c9f1fcde465ca |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-b5128d8b05704b76a46c9f1fcde465ca2025-08-20T03:39:28ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/66659966665996Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage StatesXuezeng Liu0Yunlong Sang1Shuang Ding2Guiliang You3Wenxuan Zhu4Ruoyang Zhou5Qiang Wei6Liang Jiang7Tongji University, Shanghai 200092, ChinaShanghai Tongyan Civil Engineering Technology Co., Ltd., Shanghai 200092, ChinaShanghai Tongyan Civil Engineering Technology Co., Ltd., Shanghai 200092, ChinaHuadu District Transportation Bureau, Guangzhou 510800, ChinaNagoya Institute of Technology, Nagoya 466-8555, JapanChina State Construction Engineering Corporation, Beijing 10029, ChinaGui Zhou Expressway Group Co.Ltd., Guiyang 550001, ChinaGui Zhou Expressway Group Co.Ltd., Guiyang 550001, ChinaCracks and other diseases may occur in the long-term operation of highway tunnels and reduce the structural load-carrying capacity. Strengthening using carbon fiber reinforced polymer (CFRP) sheets and other materials could extend the service time of the tunnels. However, the process of strengthening tunnels is remarkably different from the process of strengthening aboveground structures because of the secondary load. In order to understand the development of stress and deformation of strengthened tunnels under secondary load, a 1 : 10 scaled model was tested to simulate the tunnel strengthened with CFRP under different damage states. The test results show that CFRP strengthening improved the stiffness of the structure and inhibited the propagation of the existing cracks. The peeling of the CFRP sheets made the strengthened structure quickly lose its load-carrying capacity, causing the instability of the structure. The failure loads of the structures strengthened at different damage states were essentially the same, with an average value of 184% of the original failure load. Nevertheless, the early strengthening helped control the structural deformation. The test results also demonstrate that the bonding strength between the CFRP and the lining is essential for strengthening effectiveness. This study provides a theoretical basis for similar engineering reinforcement designs.http://dx.doi.org/10.1155/2020/6665996 |
| spellingShingle | Xuezeng Liu Yunlong Sang Shuang Ding Guiliang You Wenxuan Zhu Ruoyang Zhou Qiang Wei Liang Jiang Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States Geofluids |
| title | Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States |
| title_full | Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States |
| title_fullStr | Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States |
| title_full_unstemmed | Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States |
| title_short | Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States |
| title_sort | experimental study on the mechanics characteristics of cfrp strengthening of highway tunnels at different damage states |
| url | http://dx.doi.org/10.1155/2020/6665996 |
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