Seismic Behavior of As-Built, ACI-Complying, and CFRP-Repaired Exterior RC Beam-Column Joints
Publication: Journal of Composites for Construction
Volume 15, Issue 4
Abstract
In this paper, the efficiency and effectiveness of carbon-fiber-reinforced polymer (CFRP) sheets for upgrading the shear strength and ductility of a seismically deficient exterior beam-column joint were studied and compared with an American Concrete Institute (ACI)-based design joint specimen. One as-built joint specimen, representing the preseismic code design and construction practice for joints and one ACI-based design joint specimen, satisfying the seismic design requirements of the current code of practice were cast. The as-built specimen was used as baseline (control) specimen. These two specimens (i.e., the as-built control and the ACI-based specimens) were subjected to cyclic lateral load histories to induce damage equivalent to damage expected from a severe earthquake. The damaged control specimen was then repaired by filling its cracks with epoxy and externally bonding CFRP sheets to the joint, the beam, and part of the column regions. This specimen was identified as the repaired specimen. The repaired specimen was subjected to a similar cyclic lateral load history, and its response history was recorded. The response histories of the as-built control, the repaired, and the ACI-based design specimen were then compared. The test results demonstrated that externally bonded CFRP sheets can effectively improve both the shear strength and the deformation capacity of seismically deficient and damaged beam-column joints to a state comparable to the ACI-based design joint.
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Acknowledgments
The experimental work conducted by the authors and described in this paper was performed at the Structural Engineering Lab of the Civil Engineering Department at King Saud University and was jointly funded by King Abdulaziz City for Science and Technology (KACST) and the SBG Chair of Research and Studies in Strengthening and Rehabilitation of Structures.
References
Almusallam, T. H., and Al-Salloum, Y. A. (2007). “Seismic response of interior beam-column joints upgraded with FRP sheets. II: Analysis and parametric study.” J. Compos. Constr., 11(6), 590–600.
Al-Salloum, Y. A., and Almusallam, T. H. (2007). “Seismic response of interior beam-column joints upgraded with FRP sheets. I: Experimental study.” J. Compos. Constr., 11(6), 575–589.
Alsayed, S. H., Al-Salloum, Y. A., Almusallam, T. H., and Siddiqui, N. A. (2010). “Seismic response of FRP-upgraded exterior RC beam-column joints.” J. Compos. Constr., 14(2), 195–208.
American Concrete Institute (ACI)-ASCE Committee 352. (2002). “Recommendations for design of beam-column connections in monolithic reinforced concrete structures.” ACI 352R-02, Farmington Hills, MI.
American Concrete Institute (ACI) Committee 318. (2002). “Building code requirements for structural concrete and commentary.” ACI 318-02 and ACI 318R-02, Farmington Hills, MI.
Antonopoulos, C. P., and Triantafillou, T. C. (2002). “Analysis of FRP-strengthened beam-column joints.” J. Compos. Constr., 6(1), 41–51.
Antonopoulos, C. P., and Triantafillou, T. C. (2003). “Experimental investigation of FRP-strengthened RC beam-column joints.” J. Compos. Constr., 7(1), 39–49.
Baglin, P. S., and Scott, R. H. (2000). “Finite element modeling of reinforced concrete beam-column connections.” ACI Struct. J., 97(6), 886–894.
Balsamo, A., Colombo, A., Manfredi, G., Negro, P., and Prota, A. (2005). “Seismic behavior of a full-scale RC frame repaired using CFRP laminates.” Eng. Struct., 27(5), 769–780.
Cheung, P. C., Paulay, T., and Park, R. (1993). “Behaviour of beam-column joints in seismically loaded reinforced concrete frames.” Struct. Eng. Part A, 71(8), 129–138.
Di Ludovico, M., Prota, A., Manfredi, G., and Cosenza, E. (2008). “Seismic strengthening of an under-designed RC structure with FRP.” Earthquake Eng. Struct. Dyn., 37(1), 141–162.
El-Amoury, T., and Ghobarah, A. (2002). “Seismic rehabilitation of beam-column joint using GFRP sheets.” Eng. Struct., 24(11), 1397–1407.
Engindeniz, M., Kahn, L. F., and Zureick, A. (2008a). “Performance of an RC corner beam-column joint severely damaged under bidirectional loading and rehabilitated with FRP composites.” ACI SP-258, Farmington Hills, MI.
Engindeniz, M., Kahn, L. F., and Zureick, A. (2008b). “Pre-1970 RC corner beam-column-slab joints: Seismic adequacy and upgradability with CFRP composites.” Proc., 14th World Conf. on Earthquake Engineering, International Association for Earthquake Engineering (IAEE), Tokyo, 12–17.
Gergely, J., Pantelides, C. P., and Reaveley, L. D. (2000). “Shear strengthening of RCT-joints using CFRP composites.” J. Compos. Constr., 4(2), 56–64.
Ghobarah, A., and El-Amoury, T. (2005). “Seismic rehabilitation of deficient exterior concrete frame joints.” J. Compos. Constr., 9(5), 408–416.
Ghobarah, A., and Said, A. (2001). “Seismic rehabilitation of beam-column joints using FRP laminates.” J. Earthquake Eng., 5(1), 113–129.
Ghobarah, A., and Said, A. (2002). “Shear strengthening of beam-column joints.” Eng. Struct., 24(7), 881–888.
Hakuto, S., Park, R., and Tanaka, H. (2000). “Seismic load tests on interior and exterior beam-column joints with substandard reinforcing details.” ACI Struct. J., 97(1), 11–25.
Hanson, N. W., and Connor, H. W. (1967). “Seismic resistance of reinforced concrete beam-column joints.” J. Struct. Div., 93(5), 533–560.
Hwang, S.-J., and Lee, H.-J. (2000). “Analytical model for predicting shear strengths of interior reinforced concrete beam-column joints for seismic resistance.” ACI Struct. J., 97(1), 35–44.
Karayannis, C., and Sirkelis, G. (2008). “Strengthening and rehabilitation of RC beam-column joints using carbon-FRP jacketing and epoxy resin injection.” Earthquake Eng. Struct. Dyn., 37(5), 769–790.
Lee, W. T., Chiou, Y. J., and Shih, M. H. (2010). “Reinforced concrete beam-column joint strengthened with carbon fiber reinforced polymer.” Compos. Struct., 92(1), 48–60.
Mukherjee, A., and Joshi, M. (2005). “FRPC reinforced concrete beam-column joints under cyclic excitation.” Compos. Struct., 70(2), 185–199.
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.
Pantazopoulou, S., and Bonacci, J. (1992). “Consideration of questions about beam-column joints.” ACI Struct. J., 89(1), 27–36.
Pantazopoulou, S. J., and Bonacci, J. F. (1994). “On earthquake-resistant reinforced concrete frame connections.” Can. J. Civ. Eng., 21(2), 307–328.
Pantelides, C. P., Okahashi, Y., and Reaveley, L. D. (2008). “Seismic rehabilitation of reinforced concrete frame interior beam-column joints with FRP composites.” J. Compos. Constr., 12(4), 435–445.
Paulay, T. (1989). “Equilibrium criteria for reinforced concrete beam-column joints.” ACI Struct. J., 86(6), 635–643.
Tsonos, A. (2008). “Effectiveness of CFRP-jackets and RC-jackets in post-earthquake and pre-earthquake retrofitting of beam-column subassemblages.” Eng. Struct., 30(3), 777–793.
Tsonos, A. (2010). “Performance enhancement of RC building columns and beam-column joints through shotcrete jacketing.” Eng. Struct., 32(3), 726–740.
Zerbe, H. E., and Durrani, A. J. (1989). “Seismic response of connections in two-bay RC frame subassemblies.” J. Struct. Eng., 115(11), 2829–2844.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 4 • August 2011
Pages: 522 - 534
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jan 6, 2010
Published online: Oct 1, 2010
Accepted: Oct 27, 2010
Published in print: Aug 1, 2011
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