New Connection System for Confined Concrete Columns and Beams. I: Experimental Study
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VIEW THE REPLYPublication: Journal of Structural Engineering
Volume 134, Issue 12
Abstract
A new connection system for a concrete filled steel tube composite column and reinforced concrete beams is proposed. In this connection, the steel tube is interrupted while the reinforced concrete beams are continuous in the joint zone. Multiple lateral hoops that constitute the stiffening ring are used to confine the core concrete in the connection zone. The transfer of moment at the beam ends can be ensured by continuous rebars; the weakening of the axial load bearing capacity due to the interruption of the steel tube can be compensated by the confinement of the stiffening ring. Using these configurations, concrete casting and tube lifting can be made more convenient since welding and hole drilling in situ can be avoided. Axial compression experiments on six specimens and reversed cyclic loading tests on three interior column specimens and three corner column specimens were conducted to evaluate this new beam-column system; load-deflection performance, typical failure modes, stress and strain distributions, and the energy dissipation capacity were obtained. The experimental results showed that the effective confinement can be achieved by the stiffening ring, and an excellent axial bearing capacity can be obtained, as well as a superior ductility and energy dissipation capacity. As a new connection system for the concrete filled steel tube composite column with reinforced concrete beams, it can also be applied to other types of confined concrete columns.
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Acknowledgments
The writers appreciate the financial support from the Chinese National Science Foundation (Grant No. 50438020 and 50828803), and the third writer also appreciates the financial support from Louisiana State University.
References
Azizinamini, A., and Elremaily, A. (2001). “Design provisions for connections between steel beams and concrete filled tube columns.” J. Constr. Steel Res., 57, 971–995.
Azizinamini, A., Shekar, Y., and Saadeghvaziri, M. A. (1995). “Design of through beam connection detail for circular composite columns.” Eng. Struct., 17(3), 209–213.
Bai, Y., Nie, J., and Cai, C. S. (2008). “New connection system for confined concrete column and beams. II: Theoretical modeling.” J. Struct. Eng. 134(12), 1800–1809.
Beutel, M., Thambiratnam, D., and Perera, N. (2001). “Monotonic behaviour of composite column to beam connections.” Eng. Struct., 23, 1152–1161.
Cheng, C. T., and Chung, L. L. (2003). “Seismic performance of steel beams to concrete-filled steel tubular column connections.” J. Constr. Steel Res., 59, 405–426.
Cho, C. G., Kwon, M., and Spacone, E. (2005). “Analytical model of concrete-filled fiber-reinforced polymer tubes based on multiaxial constitutive laws.” J. Struct. Eng., 131(9), 1426–1433.
Gould, N. C., and Harmon, T. G. (2000). “Design limit states for composite-confined concrete columns.” Proc., Engineering Mechanics Conf., ASCE, Reston, Va.
Hajjar, J. F., Gourley, B. C., and Olson, M. C. (1997). “A cyclic nonlinear model for concrete-filled tubes. I: Formulation.” J. Struct. Eng., 123(6), 736–744.
Kang, C. H., Shin, K. J., Oh, Y. S., and Moon, T. S. (2001). “Hysteresis behavior of CFT column to H-beam connections with external T-stiffeners and penetrated elements.” Eng. Struct., 23, 1194–1201.
Kvedaras, A. K., and Sapalas, A. (1999). “Research and practice of concrete-filled steel tubes in Lithuania.” J. Constr. Steel Res., 49, 197–212.
Mahin, S. A. (1998). “Lessons from damage to steel buildings during the Northridge earthquake.” Eng. Struct., 20(4–6), 261–270.
Miller, D. K. (1998). “Lessons learned from the Northridge earthquake.” Eng. Struct., 20(4–6), 249–260.
Nishiyama, I., Fujimoto, T., Fukumoto, T., and Yoshioka, K. (2004). “Inelastic force-deformation response of joint shear panels in beam-column moment connections to concrete-filled tubes.” J. Struct. Eng., 130(2), 244–252.
O’Shea, M. D., and Bridge, R. Q. (2000). “Design of circular thin-walled concrete filled steel tubes.” J. Struct. Eng., 126(11), 1295–1303.
Park, R., and Paulay, T. (1975). Reinforced concrete structures, Wiley, New York.
Parra-Montesinos, G. J., Liang, X., and Wight, J. K. (2003). “Towards deformation-based capacity design of RCS beam-column connections.” Eng. Struct., 25, 681–690.
Popov, E. P., Yang, T. S., and Chang, S. P. (1998). “Design of steel MRF connections before and after 1994 Northridge earthquake.” Eng. Struct., 20(12), 1030–1038.
Ricles, J. M., Fisher, J. W., Lu, L. W., and Kaufmann, E. J. (2002). “Development of improved welded moment connections for earthquake-resistant design.” J. Constr. Steel Res., 58, 565–604.
Ricles, J. M., Peng, S. W., and Lu, L. W. (2004). “Seismic behavior of composite concrete filled steel tube column-wide flange beam moment connections.” J. Struct. Eng., 130(2), 223–232.
Roeder, C. W. (1998). “Overview of hybrid and composite systems for seismic design in the United States.” Eng. Struct., 20(4–6), 355–363.
Schneider, S. P. (1998). “Axially loaded concrete-filled steel tubes.” J. Struct. Eng., 124(10), 1125–1138.
Schneider, S. P., and Alostaz, Y. M. (1998). “Experimental behavior of connections to concrete-filled steel tubes.” J. Constr. Steel Res., 45(3), 321–352.
Shin, K. J., Kim, Y. J., Oh, Y. S., and Moon, T. S. (2004). “Behavior of welded CFT column to H-beam connections with external stiffeners.” Eng. Struct., 26, 1877–1887.
Spoelstra, M. R., and Monti, G. (1999). “FRP-confined concrete model.” J. Compos. Constr., 3(3), 143–150.
Wu, L. Y., Chung, L. L., Tsai, S. F., Shen, T. J., and Huang, G. L. (2005). “Seismic behavior of bolted beam-to-column connections for concrete filled steel tube.” J. Constr. Steel Res., 61, 1387–1410.
Xiao, Y., He, W., and Choi, K. (2005). “Confined concrete-filled tubular columns.” J. Struct. Eng., 131(3), 488–497.
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© 2008 ASCE.
History
Received: Jun 5, 2007
Accepted: May 16, 2008
Published online: Dec 1, 2008
Published in print: Dec 2008
Notes
Note. Associate Editor: Judy Liu
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