Abstract
In order to evaluate the seismic behavior of confined RC column-composite beam joints, five interior joints were tested under low cyclic reversed load. The weakening extent of flanges, the number of studs, and whether to reinforce weakened flanges were used as parameters in designing these five joints. Failure characteristics, hysteretic curves, skeleton curves, ductility, energy dissipation, strength degradation, and stiffness degradation were analyzed. The test results revealed that the steel beam flanges in the joints were equivalent to the tie rod. Weakened flanges resulted in poor seismic behavior; however, the seismic behavior could be improved by increasing studs and reinforcing weakened flanges. The joint steel plate hoops, equivalent to stirrups, did not yield when the maximum load was reached, but yielded when the failure load was reached for the joints with shear failure. Increasing stud-type joints and reinforcing flange-type joints ensured good seismic behavior and met project requirements. Based on the experimental results, the failure mechanism of the joints was discussed, and the shear capacity equations of the joints was presented.
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References
ASCE Task Committee on Design Criteria for Composite Structures in Steel and Concrete. Guidelines for design of joints between steel beams and reinforced concrete columns[ J]. Journal of Structural Engineering, 1994, 120(8): 2330–2357.
Han Linhai, Li Wei. Seismic performance of CFST column to steel beam joint with RC slab: Experiments[J]. Journal of Constructional Steel Research, 2010, 66(11): 1374–1386.
Wang Wenda, Han Linhai, Uy Brian. Experimental behavior of steel reduced beam section to concrete-filled circular hollow section column connections[J]. Journal of Constructional Steel Research, 2008, 64(5): 493–504.
Nie Jianguo, Qin Kai, Cai C S. Seismic behavior of connections composed of CFSSTCs and steel-concrete composite beams: Experimental study[J]. Journal of Constructional Steel Research, 2008, 64(10): 1178–1191.
EN 1994-1-1: Eurocode 4. Design of Composite Steel and Concrete Structures-Part 1. 1: General Rules and Rules for Buildings[S]. 2004.
Paultre P, Legeron F, Mongeau D. Influence of concrete strength and transverse reinforcement yield strength on behavior of high-strength concrete columns[J]. ACI Structural Journal, 2001, 98(4): 490–501.
Nie Jianguo, Tang Liang, Cai C S. Performance of steelconcrete composite beams under combined bending and torsion[J]. Journal of Structural Engineering, 2009, 135(9): 1048–1057.
Ma Hongwei, Jiang Weishan, Cho Chongdu. Experimental study on two types of new beam-to-column connections[ J]. Steel and Composite Structures, 2011, 11(4): 291–305.
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Supported by the National Natural Science Foundation of China (No. 51209094).
Zhang Qian, born in 1978, male, Dr.
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Zhang, Q., Yu, Q., Guan, J. et al. Seismic behavior of confined RC column-composite beam joints. Trans. Tianjin Univ. 20, 174–181 (2014). https://doi.org/10.1007/s12209-014-2316-5
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DOI: https://doi.org/10.1007/s12209-014-2316-5