Seismic Behavior of Exterior GFRP-RC Beam–Column Connections: Analytical Study
Publication: Journal of Composites for Construction
Volume 22, Issue 4
Abstract
Four full-scale specimens were constructed and tested under reversal cyclic loading to study the seismic behavior of exterior glass fiber-reinforced polymer (GFRP)-reinforced concrete (RC) beam-column joints with lateral beams. The test variables were joint shear stress (0.85, 1.0, and 1.1 times the square root of the concrete compressive strength) and type of reinforcement (steel or GFRP). Test results indicated that well-designed exterior GFRP-RC beam-column joints confined with lateral beams exhibit linear behavior with minimum residual damage up to 5% drift ratio. A specialized software was used to construct a finite elements model, capable of simulating hysteresis behavior of reinforced concrete beam-column joints under seismic loading by taking into account the nonlinear behavior of concrete, confinement provided by the internal reinforcement, and the effect of cracks and bond-slip relationship between reinforcing bars and surrounding concrete. The model was used to investigate the effect of joint shear stress, size of lateral beams, reinforcement material, column axial load, and geometrical configuration on the joints’ behavior.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The authors wish to express their gratitude for the financial support received from the Natural Science and Engineering Research Council of Canada (NSERC) and the University of Manitoba Graduate Fellowship (UMGF). The GFRP reinforcement was generously provided by Schoeck Canada Inc.
References
ACI (American Concrete Institute). 2005. Acceptance criteria for moment frames based on structural testing and commentary. ACI 374.1-05. Farmington Hills, MI: ACI.
Cervenka, V., L. Jendele, and J. Cervenka. 2012. ATENA program documentation. 1: Theory. Prague, Czech Republic: Cervenka Consulting.
CSA (Canadian Standards Association) 2012. Design and construction of building structures with fibre reinforced polymers. CAN/CSA-S806-12. Toronto, Ontario, Canada: CSA.
CSA (Canadian Standards Association). 2014. Design of concrete structures. CAN/CSA-A23.3-14. Toronto, Ontario, Canada: CSA.
Fukuyama, H., Y. Masuda, Y. Sonobe, and M. Tanigaki 1995. “Structural performances of concrete frame reinforced with FRP reinforcement.” In Proc. of the 2nd Int. RILEM Symp., Non-Metallic (FRP) Reinforcement for Concrete Structures (FRPRCS-2), 275–286. London, UK: E & FN Spon.
Ghomi, S., and E. El-Salakawy. 2016. “Seismic performance of GFRP-RC exterior beam-column joints with lateral beams.” J. Compos. Constr. 20 (1): 04015019. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000582.
Hanson, N. W., and H. W. Conner. 1967. “Seismic resistance of reinforced concrete beam-column joints.” J. Struct. Div. 93 (ST5): 533–559.
Hasaballa, M. H., and E. El-Salakawy. 2016. “Shear capacity of exterior beam-column joints reinforced with GFRP bars and stirrups.” J. Compos. Constr. 20 (2): 04015047. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000609.
Mady, M., A. El-Ragaby, and E. El-Salakawy. 2011. “Seismic behavior of beam-column joints reinforced with GFRP bars and stirrups.” J. Compos. Constr. 15 (1): 875–886. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000220.
Malvar, L. J., and K. B. Cochran. 2003. “Bond between carbon fiber reinforced polymer bars and concrete. I: Experimental study.” J. Compos. Constr. 7 (2): 154–163. https://doi.org/10.1061/(ASCE)1090-0268(2003)7:2(154).
Mander, J. B., M. J. N. Priestley, and R. Park. 1988. “Theoretical stress-strain model for confined concrete.” J. Struct. Eng. 114 (8): 1804–1826. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:8(1804).
NRCC (National Research Council of Canada). 2015. National building code of Canada. Ottawa, Canada: NRCC.
Ospina, C. E., and S. D. B. Alexander. 1998. “Transmission of interior concrete column loads through floors.” J. Struct. Eng. 124 (6): 602–610. https://doi.org/10.1061/(ASCE)0733-9445(1998)124:6(602).
Saatcioglu, M., and R. Razvi. 1992. “Strength and Ductility of confined concrete.” J. Struct. Eng. 118 (6): 1590–1607. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:6(1590).
Said, A. M., and M. L. Nehdi. 2004. “Use of FRP for RC frames in seismic zones. Part II: Performance of steel-free GFRP-reinforced beam-column joints.” Appl. Compos. Mater. 11 (4): 227–245. https://doi.org/10.1023/B:ACMA.0000035480.85721.b5.
Schoeck Canada, Inc. 2015. “Schöck-ComBAR—Technical Information sheet.” Accessed February 24, 2015. http://www.schoeck-combar.com/comb/combar-gfrp-reinforcement/combar--184.
Tobbi, H., A. S. Farghaly, and B. Benmokrane. 2014. “Strength model for concrete columns reinforced with fiber-reinforced polymer bars and ties.” ACI Struct. J. 111 (4): 789–798. https://doi.org/10.14359/51686630.
Van Mier, J. G. M. 1986. “Multi-axial Strain-softening of Concrete. Part I: fracture.” Mater. Struct. 19 (3): 179–190.
Yu, J., X. Shang, and Z. Lu. 2016. “Efficiency of externally bonded L-shaped FRP laminates in strengthening reinforced-concrete interior beam-column joints.” J. Compos. Constr. 20 (3): 04015064. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000622.
Information & Authors
Information
Published In
Copyright
©2018 American Society of Civil Engineers.
History
Received: Mar 17, 2017
Accepted: Feb 20, 2018
Published online: May 31, 2018
Published in print: Aug 1, 2018
Discussion open until: Oct 31, 2018
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.