Bond between FRP composites and concrete: Assessment of design procedures and analytical models |
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| Affiliation: | 1. National and Local Unified Engineering Research Center for Basalt Fiber Production and Application Technology, Southeast University, Nanjing 210096, China;2. Key Laboratory of C&PC Structures Ministry of Education, Southeast University, Nanjing 210096, China;3. International Institute for Urban Systems Engineering, Southeast University, Nanjing 210096, China;1. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast Univ., Nanjing, China;2. Department of Civil and Architectural Engineering, City Univ. of Hong Kong, Hong Kong, China;1. Department of Civil Engineering, Korea Maritime and Ocean University, 609 Engineering Building-II, Busan 49112, Republic of Korea;2. MODJESKI and MASTERS, Inc., 100 Sterling Parkway, Suite 302, Mechanicsburg, PA 17050, USA;1. Department of Civil Engineering, Yazd University, Yazd, Iran;2. School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran;3. Centre for Infrastructure Engineering, Western Sydney University, Sydney, Australia;1. Dept. of Civil and Environmental Engineering, The University of Auckland, New Zealand;2. Principal KL Structures, San Francisco Bay Area, CA, USA;3. School of Environment, Science and Engineering, Southern Cross University, NSW 2480, Australia;4. School of Civil, Environmental and Mining Engineering, University of Adelaide, South Australia 5005, Australia;1. ISISE, Department of Civil Engineering, University of Minho, Guimarães, Portugal;2. Centre for Structural Engineering and Information, Faculty of Engineering, University of Nottingham, Nottingham, United Kingdom |
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| Abstract: | The use of fibre reinforced polymers (FRPs) to strengthen reinforced concrete (RC) structures has gained a wide popularity in the last decades. Although many experimental and analytical studies are available in literature, some issues are still under discussion in the research communities. Since the typical failure mode of FRP–concrete joints is reported to be debonding of the composite from the concrete substrate 1], the estimation of the bond strength between FRP and concrete substrate represents a key issue for the proper use of this technology. For this reason, several analytical models for the evaluation of the FRP–concrete bond strength and few models for the estimation of the effective bond length were proposed (some of them are included in design codes/recommendations/guidelines); however they were not assessed by means of an appropriate experimental database.This work shows an assessment of twenty analytical models for the evaluation of the FRP–concrete bond strength. The assessment is based on the analysis of a wide experimental database collected from the literature. The results are provided distinguishing between the test setup adopted (single or double shear test, bending test) and the material used (post impregnated sheets or pre impregnated laminates). The accuracy of each model was evaluated by means of a simplified statistical analysis. The influence of the test setup and basic material on the accuracy of the model used was analysed as well. Lastly, the accuracy of twelve available models in providing an estimation of the effective bond length was also assessed. |
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| Keywords: | A Polymer–matrix composites (PMCs) B Strength C Analytical modelling C Statistical properties/methods Bond |
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