Flexural retrofit of a bridge subjected to overweight trucks using CFRP laminates |
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| Affiliation: | 1. Department of Civil Engineering and Kentucky Transportation Center, University of Kentucky, Lexington, KY 40506-0281, USA;2. Structus, Inc. San Francisco, CA 94104, USA;1. Department of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, China;2. Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology Clear water Bay, Kowloon, Hong Kong, China;3. School of Architectural Engineering, Shenyang University, Shenyang, Liaoning Province, China;1. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University, Sipailou #2, Zip: 210096 Nanjing, China;2. Department of Civil Engineering, Southeast University Chengxian College, 210088 Nanjing, China;1. Quality & Technology Division, Engineering & Construction Group, Samsung C&T Corporation, Republic of Korea;2. School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Republic of Korea;1. Center for Infrastructure Engineering Studies, Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, USA;1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. Civil and Environmental Engineering Department, University of Houston, USA |
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| Abstract: | The reinforced concrete spans of a bridge subjected to extreme vehicular loads are investigated and retrofitted with carbon fiber reinforced polymer (CFRP) laminates. A finite element model of the bridge superstructure was created to determine the forces resulting from extreme loads. A moment–curvature analysis was subsequently carried out to investigate the flexural characteristics of the reinforced concrete sections prior to and after strengthening with CFRP laminates. The analytical modeling concluded that significant strength can be gained at the ultimate limit state, while relatively small increase in strength is observed at service load levels. The increase in flexural resistance at ultimate does provide an adequate margin of safety against further overloading. The analytical investigation and the retrofitting work are presented herein. |
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