Retrofitting Earthquake-Damaged RC Structural Walls with Openings by Externally Bonded FRP Strips and Sheets
Publication: Journal of Composites for Construction
Volume 17, Issue 2
Abstract
The majority of research studies on the behavior of reinforced concrete members with externally bonded fiber reinforced polymer (FRP) sheets have been focused on beams, columns, and beam-column joints. However, limited experimental studies have been conducted to investigate the performance of structural walls retrofitted by wrapping FRP strips or sheets, especially on structural walls with openings. The validated retrofitting schemes for strengthening damaged walls without openings may not be suitable for walls with openings. Therefore, a series of experimental studies were carried out at Nanyang Technological University, Singapore, to study the effectiveness of the proposed repair and strengthening schemes in recovering the seismic performance of the damaged walls with irregular or regularly distributed openings. The strut-and-tie approach was utilized to design the repair schemes. The repaired walls managed to recover their strength, dissipated energy, and stiffness reasonably, indicating that the strut-and-tie approach can be a good design tool for FRP-strengthening of structural walls with openings. Moreover, the shear and sliding capacities of repaired walls were enhanced by using fiber anchors. The repaired walls failed primarily because of debonding of the fiber reinforced polymer at the base of the walls.
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Acknowledgments
This research was made possible through the support of and collaboration with FYFE Asia Private Limited in Singapore. The significant assistance from Jeslin Quek and Ow Meng Chye of FYFE Asia are gratefully acknowledged.
References
Ali, M., and Wight, J. K. (1991). “RC structural walls with staggered door openings.” J. Struct. Eng., 117(5), 1514–1531.
American Concrete Institute (ACI). (2008). “Building code requirement for structural concrete (ACI 318-08) and commentary (318R-08).” Farmington Hills, MI.
Antoniades, K. K., Salonikios, T. N., and Kappos, A. J. (2003). “Cyclic tests on seismically damaged reinforced concrete walls strengthened using fiber-reinforced polymer reinforcement.” ACI Struct. J., 100(4), 510–518.
El-Maaddawy, T., and Chekfeh, Y. (2012). “Retrofitting of severely shear-damaged concrete t-beams using externally bonded composites and mechanical end anchorage.” J. Compos. Constr., 16(6), 693–704.
Engindeniz, M., Kahn, L. F., and Zureick, A. H. (2005). “Repair and strengthening of reinforced concrete beam-column joints: State of the art.” ACI Struct. J., 102(2), 187–197.
Lam, L., and Teng, J. G. (2001). “Strength of RC cantilever slabs bonded with GFRP strips.” J. Compos. Constr., 5(4), 221–227.
Li, B., and Chua, H. Y. G. (2009). “Seismic performance of strengthened reinforced concrete beam-column joints using FRP composites.” J. Struct. Eng., 135(10), 1177–1190.
Li, B., and Kai, Q. (2011). “Seismic behavior of reinforced concrete interior beam-wide column joints repaired using FRP.” J. Compos. Constr., 15(3), 327–338.
Li, B., and Lim, C. L. (2010). “Tests on seismically damaged reinforced concrete structural walls repaired using fiber-reinforced polymers.” J. Compos. Constr., 14(5), 597–608.
Lombard, J., Lau, D. T., Humar, J. L., Foo, S., and Cheung, M. S. (2000). “Seismic strengthening and repair of reinforced concrete shear walls.” Proc., 12th World Conf. on Earthquake Engineering, (CD-ROM), New Zealand Society for Earthquake Engineering, Silverstream, New Zealand, Paper No. 2032.
Marti, P. (1985). “Basic tools of reinforced concrete beam design.” ACI Struct. J., 82(1), 46–56.
Neale, K. W., Demers, M., Devino, B., and Ho, N. Y. (1997). “Strengthening of wall-type reinforced concrete columns with fiber reinforced composite sheets.” Structural failure, durability, and retrofitting, K. C. G. Ong, J. M. Lau, and P. Paramasivam, eds., Singapore Concrete Institute, Singapore, 410–417.
Pampanin, S., Bolognini, D., and Pavese, A. (2007). “Performance-based seismic retrofit strategy for existing reinforced concrete frame systems using fiber-reinforced polymer composites.” J. Compos. Constr., 11(2), 211–226.
Schlaich, J., Schäfer, K., and Jennewein, M. (1987). “Toward a consistent design of structural concrete.” PCI J., 32(3), 74–150.
Teng, J. G., Chen, M., Chen, J. F., Rosenboom, O. A., and Lam, L. (2009). “Behavior of RC beams shear strengthened with bonded or unbonded FRP wraps.” J. Compos. Constr., 13(5), 394–404.
Teng, J. G., and Lam, L. (2002). “Compressive behavior of carbon fiber reinforced polymer-confined concrete in elliptical column.” J. Compos. Constr., 128(12), 1535–1543.
Wu, H. (2005). “Design of reinforced concrete walls with openings-strut-and-tie approach.” Ph.D. thesis, Nanyang Technological Univ., Singapore.
Yanez, F. V., Park, R., and Paulay, T. (1992). “Seismic behavior of reinforced concrete walls with irregular openings.” Earthquake Engineering: 10th World Conf., International Association for Earthquake Engineering, Madrid, Spain.
Zhao, Y. M. (2004). “Strut-and-tie modeling of two-dimensional reinforced concrete structural elements.” M.S. thesis, Nanyang Technological Univ., Singapore.
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Information
Published In
Journal of Composites for Construction
Volume 17 • Issue 2 • April 2013
Pages: 259 - 270
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Feb 24, 2012
Accepted: Sep 25, 2012
Published online: Sep 27, 2012
Published in print: Apr 1, 2013
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