Behavior in compression of concrete cylinders externally wrapped with basalt fibers |
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| Affiliation: | 1. Dipartimento di Ingegneria Strutturale e Geotecnica, Sapienza Università di Roma, Via Eudossiana 18, 00184 Roma, Italy;2. Laboratory of Reinforced Concrete, Dept of Civil Engineering, Democritus University of Thrace (DUTh), Vas. Sofias 12, 67100 Xanthi, Greece;3. Department of Civil and Architectural Engineering, City University of Hong Kong, Hong Kong Special Administrative Region;1. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education (Harbin Institute of Technology, Harbin, China;2. School of Civil Engineering, Harbin Institute of Technology, Harbin, China;3. School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia;4. Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, NSW, Australia;1. Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing, China;2. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;3. School of Civil, Environmental and Mining Engineering, The University of Adelaide, Australia;1. Key Laboratory of Aerospace Advanced Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China;2. School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China;3. School of Chemistry and Environment, Beihang University, Beijing 100191, China;1. School of Civil Engineering and Mechanics, Huazhong University of Science & Technology, Wuhan, China;2. School of Civil, Environmental and Chemical Engineering, RMIT University, Australia;1. College of Civil Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, PR China;2. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, Guangxi, PR China;3. Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, Guangxi, PR China |
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| Abstract: | This paper gives additional information on the use of new class of composites constituted by Basalt Fiber Reinforced Polymer (BFRP) bonded with epoxy resin to concrete specimens as an alternative confinement material for compressed concrete members with respect to carbon or glass fibers. From the experimental point of view, concrete cylinders are wrapped with continuous fibers, in the form of sheets, applying both full and partial discrete wrapping with BFRP straps, and then tested in compression. For comparison, few other concrete cylinders are wrapped with Carbon Fiber Reinforced Polymer (CFRP) sheets and tested in compression. The number and type of plies (full or partial wrapping), the type of loading (monotonic and cyclic actions) and the type of fiber (basalt and carbon) are the main variables investigated. The experimental results obtained from the compressive tests in terms of both stress–strain curves and failure modes show the possibility of reducing the brittleness of unconfined concrete, resulting significantly increased both the post-peak resistance and the axial strain of confined concrete corresponding to BFRP failure. Form the analytical standpoint, a review of the available models given in the literature is made and verified against the experimental data. Finally, a proposal for analytical expressions aimed at the calculation of the compressive strength and corresponding strain of confined concrete is provided also including the strain at BFRP failure. |
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| Keywords: | A. Aramid fibre B. Mechanical properties C. Analytical modelling D. Mechanical testing E. Casting |
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