Numerical calibration of bond law for GFRP bars embedded in steel fibre-reinforced self-compacting concrete |
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| Affiliation: | 1. Department of Civil Engineering, University of Salerno, Fisciano (SA), Italy;2. ISISE, Dept. Civil Eng., Minho University, Guimarães, Portugal;1. Department of Civil Engineering, German University in Cairo, Egypt;2. Department of Civil Engineering, University of Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada;3. Department of Mechanical Engineering and Industrial Construction, University of Girona, Spain;1. Department of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy;2. Fachgebiet Massivbau und Baukonstruktion, Technische Universität Kaiserslautern, Paul-Ehrlich-Straße, D-67663 Kaiserslautern, Germany;1. Cerema, F-59482 Haubourdin, France;2. Université Paris-Est, MAST, EMGCU, IFSTTAR, F-77447 Marne-la-Vallée, France;3. Université Paris-Est, COSYS, LISIS, IFSTTAR, F-77447 Marne-la-Vallée, France;4. IFSTTAR, MAST, SMC, Route de Bouaye, F-44344 Bouguenais, France;5. Université Paris-Est, Laboratoire Navier (UMR 8205), CNRS, Ecole des Ponts Paris Tech, IFSTTAR, F-77455 Marne-la-Vallée, France;1. Department of Civil Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom;2. Department of Civil Engineering, Liverpool John Moores University, Liverpool L3 3AF, United Kingdom;1. Department of Civil Engineering in College of Engineering, Ocean University of China, Qingdao 266100, PR China;2. Collaborative Innovation Center of Engineering Construction and Safety in Blue Economic Zone, Qingdao 266033, PR China |
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| Abstract: | An experimental program was carried out at the Laboratory of Structural Division of the Civil Engineering Department of the University of Minho (LEST-UM) to investigate the bond behaviour of glass fibre reinforced polymer (GFRP) bars embedded in steel fibre reinforced self-compacting concrete (SFRSCC) for the development of an innovative structural system. Thirty-six pull-out-bending tests were executed to assess the influence of the bond length, concrete cover, bar diameter and surface treatment on the bond of GFRP bars embedded in SFRSCC. This paper reports the results of a numerical study aiming to identify an accurate GFRP–SFRSCC bond–slip law. Thus, the above mentioned pullout bending tests were simulated by using a nonlinear finite element (FE) constitutive model available in FEMIX, a FEM based computer program. The bond–slip relationship adopted for modelling the FE interface that simulates the interaction between bar and concrete is the key nonlinear aspect considered in the FE analyses, but the nonlinear behaviour of SFRSCC due to crack initiation and propagation was also simulated. The evaluation of the values of the relevant parameters defining such a bond–slip relationship was executed by fitting the force versus loaded end slip responses recorded in the experimental tests. Finally, correlations are proposed between the parameters identifying the bond–slip relationship and the relevant geometric and mechanical properties of the tested specimens. |
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| Keywords: | A Glass fibres B Fibre/matrix bond C Finite Element Analysis (FEA) D Mechanical testing |
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