Experimental Study on CFRP-to-Steel Bonded Interfaces under Quasi-Static Cyclic Loading
Publication: Journal of Composites for Construction
Volume 23, Issue 4
Abstract
Flexural strengthening of steel beams using carbon fiber reinforced polymer (CFRP) laminates has gained popularity within the structural engineering community due to the many advantages it offers over traditional strengthening methods. Such advantages include ease of construction, resistance to corrosion, and minimal disruption to traffic. The interfacial shear stress transfer mechanism of the CFRP-to-steel bonded interface is critical to the performance of flexurally strengthened steel beams using externally bonded CFRP laminates. Many existing studies have investigated the behavior of CFRP-to-steel bonded joints under quasi-static monotonic loading; however, few studies have been carried out on understanding the behavior of such bonded joints under cyclic loading. This paper presents an experimental investigation aimed at understanding the behavior of CFRP-to-steel bonded joints under quasi-static cyclic loading. The experimental study presented consists of nine single shear pull-off tests of FRP-to-steel bonded joints, covering three different bond thicknesses and both quasi-static monotonic and quasi-static cyclic loading. The results are discussed in terms of their failure mode, load-displacement behavior, CFRP plate axial strain distribution, interfacial shear stress distribution, and bond-slip behavior.
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Acknowledgments
The authors thank the UQ structures laboratory staff for their assistance in carrying out experimental tests.
References
ASTM. 2014. Standard test method for tensile properties of polymer matrix composite materials. ASTM D3039/D3039M. West Conshohocken, PA: ASTM.
Carrara, P., and L. De Lorenzis. 2015. “A coupled damage-plasticity model for the cyclic behavior of shear-loaded interfaces.” J. Mech. Phys. Solids 85 (Dec): 33–53. https://doi.org/10.1016/j.jmps.2015.09.002.
Chen, J., and J. G. Teng. 2001. “Anchorage strength models for FRP and steel plates bonded to concrete.” J. Struct. Eng. 127 (7): 784–791. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:7(784).
Dawood, M., S. Rizkalla, and E. Sumner. 2007. “Fatigue and overloading behaviour of steel-concrete composite flexural members strengthened with high modulus CFRP materials.” J. Compos. Constr. 11 (6): 659–669. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:6(659).
De Lorenzis, L., D. Fernando, and J. G. Teng. 2013. “Coupled mixed-mode cohesive zone modeling of interfacial stresses in plated beams.” Int. J. Solids Struct. 50 (14–15): 2477–2494. https://doi.org/10.1016/j.ijsolstr.2013.03.035.
De Waal, L., D. Fernando, R. Cork, and J. Foote. 2017. “FRP strengthening of 60-year-old pre-stressed concrete bridge deck units.” Eng. Struct. 143 (Jul): 346–357. https://doi.org/10.1016/j.engstruct.2017.03.062.
Elchalakani, M., and D. Fernando. 2012. “Plastic mechanism analysis of unstiffened steel I-section beams strengthened with CFRP under 3-point bending.” Thin-Walled Struct. 53 (Apr): 58–71. https://doi.org/10.1016/j.tws.2012.01.005.
El Damatty, A., and M. Abushagur. 2003. “Testing and modeling of shear and peel behaviour for bonded steel/FRP connections.” Thin-Walled Struct. 41 (11): 987–1003. https://doi.org/10.1016/S0263-8231(03)00051-X.
El Damatty, A., M. Abushagur, and M. Youssef. 2003. “Experimental and analytical investigation of steel beams rehabilitated using GFRP sheets.” Steel Compos. Struct. 3 (6): 421–438. https://doi.org/10.12989/scs.2003.3.6.421.
Fernando, D. 2010. “Bond behaviour and debonding failures in CFRP-strengthened steel members.” Ph.D. thesis, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ.
Fernando, D., A. Schumacher, M. Motavalli, J. G. Teng, T. Yu, and E. Ghafoori. 2010. “Fatigue strengthening of cracked steel beams with CFRP plates.” In Proc., ASME 2010 Int. Mechanical Engineering Congress and Exposition. New York: ASME.
Fernando, D., J. G. Teng, T. Yu, and X. L. Zhao. 2013a. “Preparation and characterization of steel surfaces for adhesive bonding.” J. Compos. Constr. 17 (6): 04013012. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000387.
Fernando, D., T. Yu, and J. G. Teng. 2013b. “Behavior of CFRP laminates bonded to a steel substrate using a ductile adhesive.” J. Compos. Constr. 18 (2): 04013040. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000439.
Fernando, D., T. Yu, and J. G. Teng. 2015. “Behaviour and modelling of CFRP-strengthened rectangular steel tubes subjected to a transverse end bearing load.” Int. J. Struct. Stability Dyn. 15 (8): 1540031. https://doi.org/10.1142/S0219455415400313.
Fernando, D., T. Yu, J. G. Teng, and X. L. Zhao. 2009. “CFRP strengthening of rectangular steel tubes subjected to end bearing loads: Effect of adhesive properties and finite element modeling.” Thin-Walled Struct. 47 (10): 1020–1028. https://doi.org/10.1016/j.tws.2008.10.008.
Hollaway, L. C., and J. G. Teng. 2008. Strengthening and rehabilitation of civil infrastructures using fibre-reinforced polymer (FRP) composites. Cambridge, UK: Woodhead Publishing.
Jones, S. C., and S. A. Civjan. 2003. “Application of fibre reinforced polymer overlays to extend steel fatigue life.” J. Compos. Constr. 7 (4): 331–338. https://doi.org/10.1061/(ASCE)1090-0268(2003)7:4(331).
Kim, Y. J., and K. A. Harries. 2011. “Fatigue behaviour of damaged steel beams repaired with CFRP strips.” Eng. Struct. 33 (5): 1491–1502. https://doi.org/10.1016/j.engstruct.2011.01.019.
Ko, H., and Y. Sato. 2007. “Bond stress-slip relationship between FRP sheet and concrete under cyclic load.” J. Compos. Constr. 11 (4): 419–426. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:4(419).
Liu, H., X. Zhao, and R. Al-Mahaidi. 2010. “Effect of fatigue loading on bond strength between CFRP sheets and steel plates.” Int. J. Struct. Stability Dyn. 10 (1): 1–20. https://doi.org/10.1142/S0219455410003348.
Martinelli, E., and A. Caggiano. 2014. “A unified theoretical model for the monotonic and cyclic response of FRP strips glued to concrete.” Polymers 6 (2): 370–381. https://doi.org/10.3390/polym6020370.
Matta, F., V. M. Karbhari, and R. Vitaliani. 2005. “Tensile response of steel/CFRP adhesive bonds for the rehabilitation of civil structures.” Strut. Eng. Mech. 20 (5): 589–608. https://doi.org/10.12989/sem.2005.20.5.589.
Miller, T. C., M. J. Chajes, D. R. Mertz, and J. N. Hastings. 2001. “Strengthening of a steel bridge girder using CFRP plates.” J. Bridge Eng. 6 (6): 514–522. https://doi.org/10.1061/(ASCE)1084-0702(2001)6:6(514).
Pham, H. B., and R. Al-Mahaidi. 2007. “Modelling of CFRP-concrete shear-lap tests.” Constr. Build. Mater. 21 (4): 727–735. https://doi.org/10.1016/j.conbuildmat.2006.06.012.
Rizkalla, S., M. Dawood, and D. Schnerch. 2008. “Development of a carbon fibre reinforced polymer system for strengthening steel structures.” Compos. Part A: Appl. Sci. Manuf. 39 (2): 388–397. https://doi.org/10.1016/j.compositesa.2007.10.009.
Schnerch, D., M. Dawood, S. Rizkalla, E. Sumner, and K. Stanford. 2006. “Bond behavior of CFRP strengthened steel structures.” Adv. Struct. Eng. 9 (6): 805–817. https://doi.org/10.1260/136943306779369464.
Shaat, A., D. Schnerch, A. Fam, and S. Rizkalla. 2004. “Retrofit of steel structures using fibre-reinforced polymers (FRP): State-of-the-art.” In Proc., Transportation Research Board (TRB) Annual Meeting. Washington, DC: Transportation Research Board.
Smith, S. T., and J. G. Teng. 2002a. “FRP-strengthened RC beams. I: Review of debonding strength models.” Eng. Struct. 24 (4): 385–395. https://doi.org/10.1016/S0141-0296(01)00105-5.
Smith, S. T., and J. G. Teng. 2002b. “FRP-strengthened RC beams. II: Assessment of debonding strength models.” Eng. Struct. 24 (4): 397–417. https://doi.org/10.1016/S0141-0296(01)00106-7.
Tavakkolizadeh, M., and H. Saadatmanesh. 2003. “Repair of damaged steel-concrete composite girders using carbon fibre-reinforced polymer sheets.” J. Compos. Constr. 7 (4): 311–322. https://doi.org/10.1061/(ASCE)1090-0268(2003)7:4(311).
Teng, J. G., D. Fernando, and T. Yu. 2015. “Finite element modelling of debonding failures in steel beams flexurally strengthened with CFRP laminates.” Eng. Struct. 86 (Mar): 213–224. https://doi.org/10.1016/j.engstruct.2015.01.003.
Teng, J. G., D. Fernando, T. Yu, and X. Zhao. 2012a. “Debonding failures in CFRP-strengthened steel structures.” In Proc., 3rd Asia-Pacific Conf. on FRP in Structures. Sapporo, Japan: Hokkaido Univ.
Teng, J. G., T. Yu, and D. Fernando. 2012b. “Strengthening of steel structures with fiber-reinforced polymer composites.” J. Constr. Steel Res. 78 (Nov): 131–143. https://doi.org/10.1016/j.jcsr.2012.06.011.
Wu, C., X. L. Zhao, W. K. Chiu, R. Al-Mahaidi, and W. H. Duan. 2013. “Effect of fatigue loading on the bond behaviour between UHM CFRP plates and steel plates.” Compos. Part B: Eng. 50 (Jul): 344–353. https://doi.org/10.1016/j.compositesb.2013.02.040.
Yao, J., J. G. Teng, and J. Chen. 2005. “Experimental study on FRP-to-concrete bonded joints.” Compos. Part B: Eng. 36 (2): 99–113. https://doi.org/10.1016/j.compositesb.2004.06.001.
Yu, T., D. Fernando, J. G. Teng, and X. Zhao. 2012. “Experimental study on CFRP-to-steel bonded interfaces.” Compos. Part B: Eng. 43 (5): 2279–2289. https://doi.org/10.1016/j.compositesb.2012.01.024.
Zhao, X. L., Y. Bai, R. Al-Mahaidi, and S. Rizkalla. 2013. “Effect of dynamic loading and environmental conditions on the bond between CFRP and steel: State-of-the-art review.” J. Compos. Constr. 18 (3): A4013005. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000419.
Zhao, X. L., D. Fernando, and R. Al-Mahaidi. 2006. “CFRP strengthened RHS subjected to transverse end bearing force.” Eng. Struct. 28 (11): 1555–1565. https://doi.org/10.1016/j.engstruct.2006.02.008.
Zhao, X. L., and L. Zhang. 2007. “State-of-the-art review on FRP strengthened steel structures.” Eng. Struct. 29 (8): 1808–1823. https://doi.org/10.1016/j.engstruct.2006.10.006.
Zhou, H., D. Fernando, G. M. Chen, and S. Kitipornchai. 2017. “The quasi-static cyclic behaviour of CFRP-to-concrete bonded joints: An experimental study and a damage plasticity model.” Eng. Struct. 153 (Dec): 43–56. https://doi.org/10.1016/j.engstruct.2017.10.007.
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Published In
Journal of Composites for Construction
Volume 23 • Issue 4 • August 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Oct 26, 2017
Accepted: Nov 26, 2018
Published online: Apr 30, 2019
Published in print: Aug 1, 2019
Discussion open until: Sep 30, 2019
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