Effective strain of RC beams strengthened in shear with FRP |
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| Authors: | Jung-Yoon Lee Hyun-Bok Hwang Jeung-Hwan Doh |
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| Affiliation: | 1. Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University, Suwon, Republic of Korea;2. Griffith School of Engineering, Griffith University, Gold Coast Campus, Queensland 4222, Australia;1. Civil and Environmental Engineering Department, United Arab Emirates University, Al Ain, P.O. Box 17555, United Arab Emirates;2. Civil Engineering Department, Helwan University, P.O. Box 17718, Cairo, Egypt;1. College of Civil Science and Engineering, Yangzhou Univ., Yangzhou 225127, China;2. Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast Univ., Nanjing 210096, China;1. Technical Institute of Babylon, Al-Furat Al-Awsat Technical University (ATU), Iraq;2. College of Engineering, Al-Muthanna University, Samawah 66001, Iraq;3. Department of Building and Construction Technical Engineering, College of Technical Engineering, The Islamic University, 54001 Najaf, Iraq;4. Department of Civil Engineering, Liverpool John Moores University, UK;5. Al-Furrat Al-Awsat Distribution Foundation, Ministry of Oil, Babylon, Iraq;6. Department of Civil Engineering, Al- Mustaqbal University College, Babylon, Iraq;1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;2. Shenzhen HuaNuo Architectural Design & Research Institute CO., LTD., Shenzhen 518111, China;3. Faculty of Civil Engineering, Kunming University of Science and Technology, Kunming 650000, China;4. School of Civil Engineering, Central South University, Changsha 410083, China;1. Department of Construction Engineering, Universitat Politècnica de Catalunya (UPC) – Barcelona TECH, Campus Nord, C/Jordi Girona 1-3, Mod C1, 08034 Barcelona, Spain;2. Analysis and Advanced Materials for Structural Design (AMADE), Polytechnic School, University of Girona, Campus Montilivi s/n, 17071 Girona, Spain;1. Structural Technologies, Dubai, United Arab Emirates;2. American University of Sharjah, Department of Civil Engineering, P.O. Box 26666, Sharjah, United Arab Emirates;3. American University of Sharjah, Materials Science and Engineering Research Institute, P.O. Box 26666, Sharjah, United Arab Emirates |
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| Abstract: | The failure modes of Reinforced Concrete (RC) beams strengthened in shear with Fiber Reinforced Polymer (FRP) sheets or strips are not well understood as much as those of RC beams reinforced with steel stirrups. When the beams are strengthened in shear with FRP composites, beams may fail due to crushing of the concrete before the FRP reaches its rupture strain. Therefore, the effective strain of the FRP plays an important role in predicting the shear strength of such beams. This paper presents the results of an analytical and experimental study on the performance of reinforced concrete beams strengthened in shear with FRP composites and internally reinforced with conventional steel stirrups. Ten RC beams strengthened with varying FRP reinforcement ratio, the type of fiber material (carbon or glass) and configuration (continuous sheets or strips) were tested. Comparisons between the observed and calculated effective strains of the FRP in the tested beams failing in shear showed reasonable agreement. |
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