Seismic Performance of Strengthened Reinforced Concrete Beam-Column Joints Using FRP Composites
Publication: Journal of Structural Engineering
Volume 135, Issue 10
Abstract
Three nonseismically detailed interior reinforced concrete beam-column joints, namely, one eccentric and two concentric joints, strengthened with proposed fiber-reinforced polymer (FRP) wrapping configurations using glass fiber-reinforced polymer and carbon fiber-reinforced polymer strips and sheets, were tested under constant axial compression load and reversed cyclic loading which simulated low to moderate earthquake forces. Seismic performance of the strengthened beam-column joints in terms of their hysteresis response, stiffness, and energy dissipation capacity is evaluated and compared to those of the original and unstrengthened beam-column joints. Results indicate that applying strips at 45º on a flushed eccentric joint core and as cross bracing on the beam and confinement round the column is very effective. All specimens failed with gradual strength deterioration, bond degradation, and debonding of FRP sheets was observed near the joint core. The proposed strengthening schemes were found to be efficient and economical for mass repair or upgrading of nonseismically detailed structures.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This research was made possible through the support of, and in collaboration with FYFE Asia Pte. Ltd. in Singapore. The significant assistance from Engr. Jeslin Quek and Mr. Ow Meng Chye of FYFE Asia are gratefully acknowledged.
References
Antonopoulos, C. P., and Triantafillou, T. C. (2003). “Experimental investigation of FRP-strengthened RC beam-column joints.” J. Compos. Constr., 7(1), 39–49.
Clyde, C., and Pantelides, C. P. (2003). “Seismic evaluation and rehabilitation of R/C exterior building joints.” Proc., 7th National Conf. on Earthquake Engineering (7NCEE), Earthquake Engineering Research Institute, Oakland, Calif.
Columb, F., Tobbi, H., Ferrier, E., and Hamelin, P. (2008). “Seismic retrofit of reinforced concrete short columns by CFRP materials.” Compos. Struct., 82(4), 475-487.
Construction Innovation. (2002).“Review of strengthening techniques using externally bonded fiber reinforced polymer composites: Decision support tools for concrete infrastructure rehabilitation.” Rep. No. 2002-005-C-01, Construction Innovation, Australia, 67.
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. H. (2005). “Repair and strengthening of reinforced concrete beam-column joints: State of the art.” ACI Struct. J., 102(2), 187–197.
Gergely, I., Pantelides, C. P., Nuismer, R. J., and Reaveley, L. D. (1998). “Bridge pier retrofit using fiber-reinforced plastic composites.” J. Compos. Constr., 2(4), 165–174.
Ghobarah, A., and Said, A. (2002). “Shear strengthening of beam-column joints.” Eng. Struct., 24(7), 881–888.
Karayannis, C. G. and Sirkelis, G. M. (2002). “Effectiveness of RC beam-column connections strengthening using carbon-FRP jackets.” Proc., 12th European Conf. on Earthquake Engineering, London, U.K., PR549.
Standard Association of New Zealand. (1982). Code of practice for the design of concrete structures (NZS 3101:1982), Wellington, New Zealand, Parts 1 and 2, 127–156.
Tsonos, A. G. (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.
Wu, Y. M. (2001). “Experimental and analytical study of reinforced concrete interior beam-wide column joints for seismic performance.” MEng thesis, Nanyang Technological University, Singapore, 268.
Information & Authors
Information
Published In
Copyright
© 2009 ASCE.
History
Received: Nov 7, 2007
Accepted: May 11, 2009
Published online: Sep 15, 2009
Published in print: Oct 2009
Notes
Note. Associate Editor: Yan Xiao
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.