Effect of imperfections in the bond on the strength of FRP wrapped cylindrical concrete columns |
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| Affiliation: | 1. Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721 302, India;2. Central Building Research Institute, Roorkee 247 667, Uttarkhand, India;1. School of Engineering, University of Glasgow, Glasgow, UK;2. Laboratoire des Fluides Complexes et leurs Réservoirs, LFC-R UMR5150, Univ. Pau & Pays Adour, Anglet, France;3. Université de Bordeaux, UMR 5295, Institut de Mécanique et d''Ingénierie - Bordeaux (I2M), Dept. Génie Civil et Environnemental (GCE), Bordeaux, France;1. Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China;2. Dept. of Architecture and Building Engineering, Kanagawa Univ., Kanagawa 2218686, Japan;3. School of Civil Engineering, Central South University, 22 Shaoshannan Road, Changsha 410075, China;1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. School of Civil, Mining and Environmental Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia;1. College of Civil Engineering, Tongji University, Shanghai, China;2. Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen, China;3. Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Italy |
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| Abstract: | Effect of imperfections at the interface between concrete and FRP on the strength of FRP confined axially loaded cylindrical concrete columns is investigated, experimentally and numerically. It is seen that the presence of imperfections facilitates localization of deformation, adversely affects the confining capacity of FRP, and reduces the failure load. The influence of size, location and orientation of imperfection on failure load is studied: the orientation and location are found to be more important than size. Critical locations and orientations of the imperfection are found and explained in terms of the mechanics of shear banding in pressure-sensitive elasto-plastic materials. |
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| Keywords: | A Glass fibers B Interface C Finite element analysis (FEA) D Mechanical testing Imperfections |
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