Seismic Performance of Shear-Controlled CFRP-Strengthened High-Strength Concrete Square Columns under Simulated Seismic Load
Publication: Journal of Composites for Construction
Volume 22, Issue 6
Abstract
Ten high-strength shear-controlled square columns are constructed and seven of them are strengthened with carbon fiber–reinforced polymer (CFRP) straps. These columns are then tested under simulated seismic load at the standard axial compression ratio range from 0.119 to 0.714. The main variables in this study include the value of axial compression ratio, CFRP layout, number of CFRP sheets, and predamaged condition. The failure modes, lateral load-displacement curves, and several important seismic parameters are analyzed. The test results show that the seismic behavior of the columns is obviously increased by wrapping CFRP sheets around the columns even at an ultrahigh axial compression ratio, which confirms the validity of loosening the allowable axial compression ratio for strengthened columns. Based on the study of ductility and ultimate lateral capacity, it is suggested that the CFRP straps are more suitable to strengthen the columns than is the fully wrapped CFRP layout at the same volumetric ratio of CFRP and confined concrete. Finally, an effective stiffness degradation model and an ultimate shear capacity model are proposed. It is evident that satisfactory accuracy and good agreement between the theoretical predictions and the test data from this research and other relevant literature are achieved for the two proposed models.
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Acknowledgments
The financial support provided by the National Natural Science Foundation of China (Project Nos. 51178078 and 51208077) is gratefully acknowledged.
References
Araki, N., Y. Matsuzaki, K. Nakano, T. Kataoka, and H. Fukuyama. 1997. “Shear capacity of retrofitted RC members with continuous fiber sheets.” In Vol. 1 of Proc., 3rd Int. Symp. on Non-Metallic (FRP) Reinforcement for Concrete Structure, 512–522. Sapporo, Japan: Japan Concrete Institute.
Cai, Z., D. Wang, S. T. Smith, and Z. Wang. 2016. “Experimental investigation on the seismic performance of GFRP-wrapped thin-walled steel tube confined RC columns.” Eng. Struct. 110 (1): 269–280. https://doi.org/10.1016/j.engstruct.2015.11.043.
Cao, S. Y., J. G. Teng, J. F. Chen, and H. X. Qiu. 2003. “Experimental study on strain distribution in externally bonded FRP for shear strengthening of RC beams.” [In Chinese.] China Civ. Eng. J. 36 (11): 6–11. https://doi.org/10.15951/j.tmgcxb.2003.11.002.
Chaallal, O., M. J. Nollet, and D. Perraton. 1998. “Strengthening of reinforced concrete beams with externally bonded fiber-reinforced-plastic plates: Design guidelines for shear and flexure.” Can. J. Civ. Eng. 25 (4): 692–704. https://doi.org/10.1139/l98-008.
Chaallal, O., M. Shahawy, and M. Hassan. 2002. “Performance of reinforced concrete T-girders strengthened in shear with carbon fiber-reinforced polymer fabric.” ACI Struct. J. 99 (3): 335–343.
Chen, J. F., and J. G. Teng. 2003a. “Shear capacity of FRP-strengthened RC beams: FRP debonding.” Constr. Build. Mater. 17 (1): 27–41. https://doi.org/10.1016/S0950-0618(02)00091-0.
Chen, J. F., and J. G. Teng. 2003b. “Shear capacity of fiber-reinforced polymer-strengthened reinforced concrete beams: Fiber reinforced polymer rupture.” J. Struct. Eng. 129 (5): 615–625. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:5(615).
Colalillo, M. A., and S. A. Sheikh. 2012. “Seismic retrofit of shear-critical reinforced concrete beams using CFRP.” Constr. Build. Mater. 32 (1): 99–109. https://doi.org/10.1016/j.conbuildmat.2010.12.065.
Colomb, F., H. Tobbi, E. Ferrier, and P. Hamelin. 2008. “Seismic retrofit of reinforced concrete short columns by CFRP materials.” Compos. Struct. 82 (4): 475–487. https://doi.org/10.1016/j.compstruct.2007.01.028.
Del Zoppo, M., M. Di Ludovico, A. Balsamo, A. Prota, and G. Manfredi. 2017. “FRP for seismic strengthening of shear controlled RC columns: Experience from earthquakes and experimental analysis.” Compos. Part B: Eng. 129 (1): 47–57. https://doi.org/10.1016/j.compositesb.2017.07.028.
Elzanaty, A. H., A. H. Nilson, and F. O. Slate. 1986. “Shear capacity of reinforced concrete beams using high-strength concrete.” ACI J. 83 (2): 290–296.
Faustino, P., and C. Chastre. 2015. “Flexural strengthening of columns with CFRP composites and stainless steel: Cyclic behavior.” J. Struct. Eng. 142 (2): 04015136. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001400.
Funakawa, I., K. Shimono, T. Watanabe, S. Asada, and S. Ushijima. 1997. “Experimental study on shear strengthening with continuous fiber reinforcement sheet and methyl methacrylate resin.” In Vol. 1 of Proc., 3rd Int. Symp. on Non-Metallic (FRP) Reinforcement for Concrete Structures, 475–482. Sapporo, Japan: Japan Concrete Institute.
Gao, P., J. Wang, Z. Li, L. Hong, and Z. Wang. 2018. “Effects of predamage on the compression performance of CFRP-confined rectangular steel reinforced concrete columns.” Eng. Struct. 162 (1): 109–120. https://doi.org/10.1016/j.engstruct.2018.02.026.
Iacobucci, R. D., S. A. Sheikh, and O. Bayrak. 2003. “Retrofit of square concrete columns with carbon fiber-reinforced polymer for seismic resistance.” ACI Struct. J. 100 (6): 785–794.
Jiang, C., Y. F. Wu, and G. Wu. 2014. “Plastic hinge length of FRP-confined square RC columns.” J. Compos. Constr. 18 (4): 04014003. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000463.
Juntanalikit, P., T. Jirawattanasomkul, and A. Pimanmas. 2016. “Experimental and numerical study of strengthening non-ductile RC columns with and without lap splice by carbon fiber reinforced polymer (CFRP) jacketing.” Eng. Struct. 125 (1): 400–418. https://doi.org/10.1016/j.engstruct.2016.07.019.
Kamiharako, A., K. Maruyama, K. Takada, and T. Shimomura. 1997. “Evaluation of shear contribution of FRP sheets attached to concrete beams.” In Vol. 1 of Proc., 3rd Int. Symp. on Non-Metallic (FRP) Reinforcement for Concrete Structures, 467–474. Sapporo, Japan: Japan Concrete Institute.
Kaptan, K. 2017. “Effectiveness of externally bonded FRP systems in strengthening of RC structures in seismic areas.” Struct. Build. 170 (5): 362–375. https://doi.org/10.1680/jstbu.15.00065.
Khalifa, A., W. J. Gold, A. Nanni, and A. A. Mi. 1998. “Contribution of externally bonded FRP to shear capacity of RC flexural members.” J. Compos. Constr. 2 (4): 195–202. https://doi.org/10.1061/(ASCE)1090-0268(1998)2:4(195).
Ma, G., and H. Li. 2015. “Experimental study of the seismic behavior of predamaged reinforced-concrete columns retrofitted with basalt fiber-reinforced polymer.” J. Compos. Constr. 19 (6): 04015016. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000572.
Memon, M. S., and S. A. Sheikh. 2005. “Seismic resistance of square concrete columns retrofitted with glass fiber-reinforced polymer.” ACI Struct. J. 102 (5): 774–783.
Mitchell, D., and M. P. Collins. 1974. “Diagonal compression field theory-A rational model for structural concrete in pure torsion.” ACI J. 71 (8): 396–408.
Mitsui, Y., K. Murakami, K. Takeda, and H. Sakai. 2012. “A study on shear reinforcement of reinforced concrete beams externally bonded with carbon fiber sheets.” Compos. Interfaces 5 (4): 285–295. https://doi.org/10.1163/156855498X00081.
Miyauchi, K., S. Inoue, S. Nishibayashi, and Y. Tanaka. 1998. “Shear behavior of reinforced concrete beam strengthened with CFRP sheet.” Trans. Jpn. Concr. Inst. 19 (1): 97–104.
MOHURD (Ministry of Housing and Urban-Rural Development of the People’s Republic of China). 2010a. Code for design of concrete structures. [In Chinese.] GB50010-2010. Beijing: China Architecture and Building Press.
MOHURD (Ministry of Housing and Urban-Rural Development of the People’s Republic of China). 2010b. Code for seismic design of buildings. [In Chinese.] GB50011-2010. Beijing: China Architecture and Building Press.
MOHURD (Ministry of Housing and Urban-Rural Development of the People’s Republic of China). 2013. Code for design of strengthening concrete structures. [In Chinese.] GB50367-2013. Beijing: China Architecture and Building Press.
Mutsuyoshi, H., T. Ishibashi, M. Okano, and F. Katsuki. 1999. “New design method for seismic retrofit of bridge columns with continuous fiber sheet—Performance-based design.” ACI Spec. Publ. 188 (1): 229–242.
Ono, K., M. Matsumura, S. Sakanishi, and K. Miyata 1997. “Strength improvement of RC bridges piers carbon fiber sheet.” In Vol. 1 of Proc., 3rd Int. Symp. on Non-Metallic (FRP) Reinforcement for Concrete Structures, 563–570. Sapporo, Japan: Japan Concrete Institute.
Osorio, E., J. M. Bairán, and A. R. Marí. 2017. “Analytical modeling of reinforced concrete columns subjected to bidirectional shear.” Eng. Struct. 138 (1): 458–472. https://doi.org/10.1016/j.engstruct.2017.02.029.
Ozbakkaloglu, T., and M. Saatcioglu. 2007. “Seismic performance of square high-strength concrete columns in FRP stay-in-place formwork.” J. Struct. Eng. 133 (1): 44–56. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:1(44).
Paultre, P., M. Boucher-Trudeau, R. Eid, and N. Roy. 2015. “Behavior of circular reinforced-concrete columns confined with carbon fiber-reinforced polymers under cyclic flexure and constant axial load.” J. Compos. Constr. 20 (3): 04015065. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000624.
Promis, G., and E. Ferrier. 2012. “Performance indices to assess the efficiency of external FRP retrofitting of reinforced concrete short columns for seismic strengthening.” Constr. Build. Mater. 26 (1): 32–40. https://doi.org/10.1016/j.conbuildmat.2011.04.067.
Promis, G., E. Ferrier, and P. Hamelin. 2009. “Effect of external FRP retrofitting on reinforced concrete short columns for seismic strengthening.” Compos. Struct. 88 (3): 367–379. https://doi.org/10.1016/j.compstruct.2008.04.019.
Rodrigues, H., A. Furtado, and A. Arêde. 2017. “Experimental evaluation of energy dissipation and viscous damping of repaired and strengthened RC columns with CFRP jacketing under biaxial load.” Eng. Struct. 145 (1): 162–175. https://doi.org/10.1016/j.engstruct.2017.05.021.
Saljoughian, A., and D. Mostofinejad. 2016. “Axial-flexural interaction in square RC columns confined by intermittent CFRP wraps.” Compos. Part B: Eng. 89 (1): 85–95. https://doi.org/10.1016/j.compositesb.2015.10.047.
Seifi, A., A. Hosseini, M. S. Marefat, and M. S. Zareian. 2017. “Improving seismic performance of old-type RC frames using NSM technique and FRP jackets.” Eng. Struct. 147 (1): 705–723. https://doi.org/10.1016/j.engstruct.2017.06.034.
Triantafillou, T. C. 1998. “Shear strengthening of reinforced concrete beams using epoxy-bonded FRP composites.” ACI Struct. J. 95 (2): 107–115.
Umezu, K., M. Fujita, H. Nakai, and K. Tamaki. 1997. “Shear behavior of RC beams with aramid fiber sheet.” In Vol. 1 of Proc., 3rd Int. Symp. on Non-Metallic (FRP) Reinforcement for Concrete Structures, 491–498. Sapporo, Japan: Japan Concrete Institute.
Vecchio, F. J., and M. P. Collins. 1986. “The modified compression field theory for reinforced concrete elements subjected to shear.” ACI J. 83 (2): 219–231.
Wang, J. Z., S. Y. Wang, and C. K. Huang. 2008. “Research on ductility and earthquake-resistance of high-strength concrete column confined by CFRP.” J. Dalian Univ. Tech. 48 (5): 708–714.
Yang, Z., Y. Liu, and J. Li. 2018. “Study of seismic behavior of RC beam-column joints strengthened by sprayed FRP.” Adv. Mater. Sci. Eng. 2018 (2): 1–10.
Ye, L. P., Q. R. Yue, S. H. Zhao, and Q. W. Li. 2002. “Shear strength of reinforced concrete columns strengthened with carbon-fiber-reinforced plastic sheet.” J. Struct. Eng. 128 (12): 1527–1534. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:12(1527).
Ye, L. P., K. Zhang, S. H. Zhao, and P. Feng. 2003. “Experimental study on seismic strengthening of RC columns with wrapped CFRP sheets.” Constr. Build. Mater. 17 (6): 499–506. https://doi.org/10.1016/S0950-0618(03)00047-3.
Youssf, O., M. A. ElGawady, and J. E. Mills. 2015. “Displacement and plastic hinge length of FRP-confined circular reinforced concrete columns.” Eng. Struct. 101 (1): 465–476. https://doi.org/10.1016/j.engstruct.2015.07.026.
Yuan, F., Y. F. Wu, and C. Q. Li. 2017. “Modelling plastic hinge of FRP-confined RC columns.” Eng. Struct. 131 (1): 651–668. https://doi.org/10.1016/j.engstruct.2016.10.018.
Zhang, G. J., X. L. Lu, and B. Q. Liu. 2006. “Seismic behavior of reinforced concrete frame columns with excessive axial compression ratios.” [In Chinese.] China Civ. Eng. J. 39 (3): 47–54.
Zhang, J., Z. X. Zhang, W. G. Zhao, H. P. Zhu, and C. S. Zhou. 2007. “Safety analysis of optimal outriggers location in high-rise building structures.” J. Zhejiang Univ.-Sci. A 8 (2): 264–269. https://doi.org/10.1631/jzus.2007.A0264.
Zhao, S. H. 1999. Experimental research on shear strength and seismic behavior of concrete column restrengthened with carbon fiber sheet. [In Chinese.] Beijing: Tsinghua Univ.
Zhao, S. H., and L. P. Ye. 2001. “Shear strength analysis of concrete column retrofitted with CFRP sheet based on strut-arch model.” [In Chinese.] Eng. Mech. 18 (6): 134–140.
Zhao, T., J. Xie, and Z. Q. Dai. 2000. “Experimental study on stress-strain curves of concrete confined with CFRP sheets.” [In Chinese.] Build. Struct. 30 (7): 40–43.
Zhou, Y. W. 2009. Analytical and experimental study on the strength and ductility of FRP-reinforced high strength concrete beam. [In Chinese.] Dalian, China: Dalian Univ. of Technology.
Zhu, B. L. 1989. Structural seismic test: Evaluation of seismic performance of structures. [In Chinese.] Beijing: Seismological Press.
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Published In
Journal of Composites for Construction
Volume 22 • Issue 6 • December 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: May 2, 2018
Accepted: Jun 22, 2018
Published online: Oct 12, 2018
Published in print: Dec 1, 2018
Discussion open until: Mar 12, 2019
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