Cyclic Load Test and Shear Strength Degradation Model for Columns with Limited Ductility Tie Details
Publication: Journal of Structural Engineering
Volume 145, Issue 2
Abstract
For existing buildings in low and moderate seismic zones, various nonseismic ties not conforming to special seismic requirements have been used in columns for convenience in reinforcing bar placement. This study investigates the failure mode and deformation capacity of such columns. First, cyclic loading tests of 12 columns with different section geometries, tie details, and axial load ratios are performed. The test results show that postyield shear failure occurs in the columns with nonseismic ties as the inelastic deformation increases, and the ductility of the columns is affected by the spacings and anchorage details of ties. Then, to estimate the deformation capacity of the columns, a postyield shear strength degradation model depending on displacement ductility and tie details is proposed. The proposed method is applied to 80 existing column specimens with a wide range of design parameters. The postyield strength degradation and deformation capacity predicted by the proposed method agree well with the test results.
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Acknowledgments
This research was supported by the Basic Science Research Programs through the National Research Foundation of Korea (NRF), funded by the Ministry of Education of Korea (2015R1A2A2A01003777 and 2018R1A6A1A07025819).
References
ACI (American Concrete Institute). 2014. Building code requirements for structural concrete and commentary. ACI 318-14. Farmington Hills, MI: ACI.
ASCE. 2014. Seismic evaluation and retrofit of existing buildings. ASCE/SEI 41-13. Reston, VA: ASCE.
Ascheim, M., and J. P. Moehle. 1992. Shear strength and deformability of RC bridge columns subjected to inelastic cyclic displacements. Berkeley, CA: Earthquake Engineering Research Center, Univ. of California.
Berry, M., M. Parrish, and M. Eberhard. 2004. PEER structural performance database, user’s manual. Berkeley, CA: Pacific Earthquake Engineering Research Center, Univ. of California.
Elwood, K. J., and J. P. Moehle. 2005a. “Axial capacity model for shear-damaged columns.” ACI Struct. J. 102 (4): 578–587.
Elwood, K. J., and J. P. Moehle. 2005b. “Drift capacity of reinforced concrete columns with light transverse reinforcement.” Earthquake Spectra 21 (1): 71–89. https://doi.org/10.1193/1.1849774.
Elwood, K. J., and J. P. Moehle. 2006. “Idealized backbone model for existing reinforced concrete columns and comparisons with FEMA 356 criteria.” Struct. Des. Tall Special Build. 15 (5): 553–569. https://doi.org/10.1002/tal.382.
Esaki, F. 1996. “Reinforcing effect of steel plate hoops on ductility of RC square columns.” In Proc., 11th World Conf. on Earthquake Engineering. Oxford, UK: Pergamon.
Gill, W. D. 1979. “Ductility of rectangular reinforced concrete columns with axial load.” Master thesis, Dept. of Civil Engineering, Univ. of Canterbury.
Kim, C. G. 2017. “Alternative reinforcement details for RC moment resisting frames with limited ductility demands.” Ph.D. dissertation, Dept. of Architecture and Architectural Engineering, Seoul National Univ.
Mo, Y. L., and S. J. Wang. 2000. “Seismic behavior of RC columns with various tie configurations.” J. Struct. Eng. 126 (10): 1122–1130. https://doi.org/10.1061/(ASCE)0733-9445(2000)126:10(1122).
Muguruma, H., F. Watanabe, and T. Komuro. 1989. “Applicability of high strength concrete to reinforced concrete ductile column.” Trans. Jpn. Concr. Inst. 11 (1): 309–316.
Nagasaka, T. 1982. “Effectiveness of steel fiber as web reinforcement in reinforced concrete columns.” Trans. Jpn. Concr. Inst. 4: 493–500.
Ono, A., N. Shirai, H. Adachi, and Y. Sakamaki. 1989. “Elasto-plastic behavior of reinforced concrete column with fluctuating axial force.” Trans. Jpn. Concr. Inst. 11: 239–246.
Park, H. G., E. J. Yu, and K. K. Choi. 2012. “Shear-strength degradation model for RC columns subjected to cyclic loading.” Eng. Struct. 34: 187–197. https://doi.org/10.1016/j.engstruct.2011.08.041.
Park, R. 1988. “Ductility evaluation from laboratory and analytical testing.” In Proc., the 9th World Conf. on Earthquake Engineering, 605–616. Tokyo: Japan Association for Earthquake Disaster Prevention.
Priestley, M. J. N., R. Verma, and Y. Xiao. 1994. “Seismic shear strength of reinforced-concrete columns.” J. Struct. Eng. 120 (8): 2310–2329. https://doi.org/10.1061/(ASCE)0733-9445(1994)120:8(2310).
Sakai, Y., J. Hibi, S. Otani, and H. Aoyama. 1990. “Experimental studies on flexural behavior of reinforced concrete columns using high-strength concrete.” Trans. Jpn. Concr. Inst. 12: 323–330.
Sezen, H. 2002. “Seismic behavior and modeling of reinforced concrete building columns.” Ph.D. dissertation, Dept. of Civil and Environmental Engineering, Univ. of California.
Sezen, H., and J. P. Moehle. 2004. “Shear strength model for lightly reinforced concrete columns.” J. Struct. Eng. 130 (11): 1692–1703. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:11(1692).
Sezen, H., and J. P. Moehle. 2006. “Seismic tests of concrete columns with light transverse reinforcement.” ACI Struct. J. 103 (6): 842–849.
Soesianawati, M. 1986. “Limited ductility design of reinforced concrete columns.” Master thesis, Dept. of Civil Engineering, Univ. of Canterbury.
Tanaka, H. 1990. “Effect of lateral confining reinforcement on the ductile behaviour of reinforced concrete columns.” Ph.D. dissertation, Dept. of Civil Engineering, Univ. of Canterbury.
Watanabe, F., and T. Ichinose. 1991. “Strength and ductility design of RC members subjected to combined bending and shear.” In Proc., Concrete Shear in Earthquake. Houston: Univ. of Houston.
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Published In
Journal of Structural Engineering
Volume 145 • Issue 2 • February 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: Oct 9, 2017
Accepted: Jul 26, 2018
Published online: Nov 30, 2018
Published in print: Feb 1, 2019
Discussion open until: Apr 30, 2019
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