Abstract
The dowel effect in hybrid bonded fiber reinforced plastic (HB-FRP) to concrete joints is difficult to quantify and make the anchoring joint instability. A new HB-FRP joint was built, which eliminates bonding between steel and FRP plates. Based on an empirical model of external bonding FRP (EB-FRP) to concrete joints and the new model of slip at debonding, the new unified bond-slip model of the HB-FRP joints is proposed. The parameters that affect the bond-slip model are analyzed. Pull-off tests are conducted for eight specimens with different numbers of mechanical fasteners, which has verified the proposed model. The load-slip relationship at the loaded end of the FRP plate was well predicted by the partial interaction numerical calculation and further verify the theoretical model.
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References
Bilotta A, Faella C, Martinelli E, Nigro E (2012) Indirect identification method of bilinear interface laws for FRP bonded on a concrete substrate. Journal of Composites for Construction 16(2):171–184, DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000253
Biscaia HC, Chastre C, Silva MA (2015) Bond-slip model for FRP-to-concrete bonded joints under external compression. Composites Part B: Engineering 80:246–259, DOI: https://doi.org/10.1016/j.compositesb.2015.06.004
Chen C, Wang X, Sui L, Xing F, Chen X, Zhou Y (2019) Influence of FRP thickness and confining effect on flexural performance of HB-strengthened RC beams. Composites Part B: Engineering 161:55–67, DOI: https://doi.org/10.1016/j.compositesb.2018.10.059
Chen S-Z, Zhang S-Y, Han W-S, Wu G (2021) Ensemble learning based approach for FRP-concrete bond strength prediction. Construction and Building Materials 302:124230, DOI: https://doi.org/10.1016/j.conbuildmat.2021.124230
Dai J, Ueda T, Sato Y (2005) Development of the nonlinear bond stress—slip model of fiber reinforced plastics sheet—concrete interfaces with a simple method. Journal of Composites for Construction 9(1):52–62, DOI:https://doi.org/10.1061/(ASCE)1090-0268(2005)9:1(52)
Elsayed WE, Ebead UA, Neale KW (2009) Studies on mechanically fastened fiber-reinforced polymer strengthening systems. ACI Structural Journal 106(1):49, DOI: https://doi.org/10.14359/56283
Gao L, Zhang F (2018) Composite interfacial bonding characteristics of HB-FRP to concrete structures. Journal of Building Materials 21(6):969–976, DOI: https://doi.org/10.3969/j.issn.1007-9629.2018.06.018
Gao L, Zhang F, Liu J-q, Lu X-r (2018) Whole-process bond characteristics of FRP-to-concrete joint under pressure. KSCE Journal of Civil Engineering 22(12):5114–5122, DOI: https://doi.org/10.1007/s12205-018-0177-5
Gao L, Zhang F, Liu J, Lu X, Gao H (2019) Experimental and numerical study on the interfacial bonding characteristics of FRP-to-concrete joints with mechanical fastening. Construction and Building Materials 199:456–470, DOI: https://doi.org/10.1016/j.conbuildmat.2018.12.033
Ghorbani M, Mostofinejad D, Hosseini A (2017) Bond behavior of CFRP sheets attached to concrete through EBR and EBROG joints subject to mixed-mode I/II loading. Journal of Composites for Construction 21(5):04017034, DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000816
Haskett M, Oehlers DJ, Ali MMJES (2008) Local and global bond characteristics of steel reinforcing bars. Engineering Structures 30(2):376–383, DOI: https://doi.org/10.1016/j.engstruct.2007.04.007
Huo J, Liu J, Dai X, Yang J, Lu Y, Xiao Y, Monti G (2016) Experimental study on dynamic behavior of CFRP-to-concrete interface. Journal of Composites for Construction 118:04016026, DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000677
Jahangir H, Eidgahee DR (2021) A new and robust hybrid artificial bee colony algorithm-ANN model for FRP-concrete bond strength evaluation. Composite Structures 257:113160, DOI: https://doi.org/10.1016/j.compstruct.2020.113160
Kabir MI, Samali B, Shrestha R (2016) Fracture properties of CFRP-concrete bond subjected to three environmental conditions. Journal of Composites for Construction 20(4):04016010, DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000665
Kamiharako AST, Maruyama K (2003) The Influence of the substrate on the bond behavior of continuous fiber sheet. Proceedings of the Japan Concrete Institute 25(2):1735–1740
Kang L (2011) Computational modeling, experimental and theoretical study on bond behaviors of hybrid-bonded FRP strengthened concrete structures. City University of Hong Kong, Hong Kong
Ko H (2007) Modeling and application of bond stress-slip relationship between FRP sheet and concrete under cyclic load. Kyoto University, Kyoto
Liu K (2011) Computational modeling, experimental and theoretical study on bond behaviors of hybrid-bonded FRP strengthened concrete structures. City University of Hong Kong
Lu X, Teng J, Ye L, Jiang J (2005) Bond-slip models for FRP sheets/plates bonded to concrete. Engineering Structures 27(6):920–937, DOI: https://doi.org/10.1016/j.engstruct.2005.01.014
Mohammadi T, Wan B, Harries KA, Sweriduk ME (2017) Bond behavior of FRP-concrete in presence of intermediate crack debonding failure. Journal of Composites for Construction 21(5):04017018, DOI: https://doi.org/10.1061/(asce)cc.1943-5614.0000797
Monti G, Renzelli M, Luciani P (2003) FRP adhesion in uncracked and cracked concrete zones. Proc., Fibre-Reinforced Polymer Reinforcement for Concrete Structures — The Sixth International Symposium on FRP Reinforcement for Concrete Structures (FRPRCS-6), World Scientific Publications 183–192, DOI: https://doi.org/10.1142/9789812704863_0015
Pellegrino C, Modena C (2009) Influence of FRP axial rigidity on FRP-concrete bond behaviour: An analytical study. Advances in Structural Engineering 12(5):639–649, DOI: https://doi.org/10.1260/136943309789867854
Rosenboom O, Rizkalla SH (2008) Experimental study of intermediate crack debonding in fiber-reinforced polymer strengthened beams. ACI Structural Journal 105(1):41–50, DOI: https://doi.org/10.14359/19067
Seracino R, Saifulnaz MRR, Oehlers DJ (2007) Generic debonding resistance of EB and NSM plate-to-concrete joints. Journal of Composites for Construction 11(1):62–70, DOI: https://doi.org/10.1061/(ASCE)1090-0268(2007)11:1(62)
Su M, Zhong Q, Peng H, Li SJC, Materials B (2021) Selected machine learning approaches for predicting the interfacial bond strength between FRPs and concrete. Construction and Building Materials 270:121456, DOI: https://doi.org/10.1016/j.conbuildmat.2020.121456
Sun W, Peng X, Yu Y (2017) Development of a simplified bond model used for simulating FRP strips bonded to concrete. Composite Structures 171:462–472, DOI: https://doi.org/10.1016/j.compstruct.2017.03.066
Teng JG, Smith ST, Yao J, Chen JF (2003) Intermediate crack-induced debonding in RC beams and slabs. Construction and Building Materials 17(6):447–462, DOI: https://doi.org/10.1016/S0950-0618(03)00043-6
Turco A, Bocciarelli M, Nanni A, Poggi C (2017) Influence of width and thickness of composite laminates on the flexural behavior of reinforced concrete beams and slabs. Composite Structures 178:186–194, DOI: https://doi.org/10.1016/j.compstruct.2017.06.024
Wu Y-F, He L, Bank L (2015) Bond-test protocol for plate-to-concrete interface involving all mechanisms. Journal of Composites for Construction 20(1):04015022, DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000581
Wu Z-M, Hu C-H, Wu Y-F, Zheng J-J (2011) Application of improved hybrid bonded FRP technique to FRP debonding prevention. Construction and Building Materials 25(6):2898–2905, DOI:https://doi.org/10.1016/j.conbuildmat.2010.12.033
Wu Y-F, Huang Y (2008) Hybrid bonding of FRP to reinforced concrete structures. Journal of Composites for Construction 12(3):266–273, DOI: https://doi.org/10.1061/(ASCE)1090-0268(2008)12:3(266)
Wu Y-F, Jiang C (2013) Quantification of bond-slip relationship for externally bonded FRP-to-concrete joints. Journal of Composites for Construction 17(5):673–686, DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000375
Wu Y-F, Liu K (2013) Characterization of mechanically enhanced FRP bonding system. Journal of Composites for Construction 17(1):34–49, DOI: https://doi.org/10.1061/(ASCE)CC.1943-5614.0000302
Wu Y-F, Yan J-H, Zhou Y-W, Xiao Y (2010) Ultimate strength of reinforced concrete beams retrofitted with hybrid bonded fiber-reinforced polymer. ACI Structural Journal 107(4):451–460, DOI:https://doi.org/10.14359/51663818
Zhang F, Gao L, Wu Y-F, Liu J (2021) Flexural design of reinforced concrete structures strengthened with hybrid bonded FRP. Composite Structures 269:113996, DOI: https://doi.org/10.1016/j.compstruct.2021.113996
Zhang H, Smith ST, Gravina RJ, Wang Z (2017) Modelling of FRP-concrete bonded interfaces containing FRP anchors. Construction and Building Materials 139:394–402, DOI: https://doi.org/10.1016/j.conbuildmat.2017.02.080
Zhou Y, Wang X, Sui L, Xing F, Huang Z, Chen C, Li P, Mei L (2018) Effect of mechanical fastening pressure on the bond behaviors of hybrid-bonded FRP to concrete interface. Composite Structures 204:731–744, DOI: https://doi.org/10.1016/j.compstruct.2018.08.008
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This work is financially supported by the Natural Science Foundation of Shandong Province, China (ZR202102260046, ZR202102240664).
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Gao, XH., Gao, L. & Zhang, F. A New Bond-Slip Model of Hybrid Bonded FRP-to-Concrete Joints. KSCE J Civ Eng 27, 270–284 (2023). https://doi.org/10.1007/s12205-022-2286-4
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DOI: https://doi.org/10.1007/s12205-022-2286-4