Pullout performance of GFRP anti-floating anchor in weathered soil |
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| Affiliation: | 1. School of Civil Engineering and Architecture, Weifang University, Weifang 266033, China;2. School of Civil and Environmental Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore;3. Institute of Geotechnical Engineering, Qingdao Technological University, Qingdao 266033, China;1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, 92, Weijin Road, Tianjin, 300072, China;2. School of Civil Engineering, Tianjin University, 135 Yaguan Road, Jinnan District, Tianjin, China;3. School of Civil & Environmental Engineering, Nanyang Technological University, 50 Nanyang Ave, 639798, Singapore;4. CCCC Tianjin Port Engineering Institute Co. Ltd., Tianjin, 300222, China;1. Department of Civil and Environmental Engineering, Gachon University, Seongnam, Republic of Korea;2. Department of Civil and Environmental Engineering, Seoul National University, Seoul, Republic of Korea;1. School of Civil & Environmental Engineering, Nanyang Technological University, 50 Nanyang Ave, 639798, Singapore;2. School of Civil Engineering, Tianjin University, 135 Yaguan Road, Jinnan District, Tianjin 300354, China;1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, China;2. School of Mines, China University of Mining and Technology, Xuzhou, China;3. School of Civil, Mining and Environmental Engineering, University of Wollongong, NSW, Australia;4. School of Civil Engineering and Surveying, University of Southern Queensland, Queensland, Australia;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering (Wuhan University), Ministry of Education, Wuhan 430072, China |
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| Abstract: | Anchors are often used as anti-floating reinforcements in civil engineering structures. However, conventional steel bars present disadvantages concerning corrosion and poor adaptability to aggressive environments. Glass fiber-reinforced polymer (GFRP) components could provide a solution to these problems. In this paper the feasibility of GFRP anti-floating anchors is evaluated. Four full scale pullout tests were performed in moderately decomposed granite (MDG). Bare Fiber Bragg grating (FBG) sensors were embedded into the specimens during the pultrusion process to monitor the stress–strain distribution along their lengths. Based on the results the behavior of the anchors was assessed, including the relationships between the pullout force and the head displacement, the axial strain along anchors and the shear stress at the GFRP-grout interface. The stress distribution of anchors showing interlaminar shear failure was then analyzed based on a maximum shear stress criterion. It was proved that the load transfer mechanism of GFRP and steel anti-floating anchors differs significantly. GFRP anti-floating anchors reach failure due to interlaminar shear failure, while conventional steel anchors generally fail as a result of shear at the grout–soil interface. The test results also showed that the embedded FBG technique is reliable for monitoring the stress–strain state of an anisotropic material. |
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| Keywords: | GFRP Anti-float anchor Bare FBG sensors Embedded Shear stress |
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