Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Connections between RC beam and square tubed-RC column under axial compression: Experiments

  • Zhou, Xu-Hong (Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education), Chongqing University) ;
  • Li, Bin-Yang (Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education), Chongqing University) ;
  • Gan, Dan (Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education), Chongqing University) ;
  • Liu, Jie-Peng (Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education), Chongqing University) ;
  • Chen, Y. Frank (Department of Civil Engineering, The Pennsylvania State University)
  • Received : 2016.08.03
  • Accepted : 2017.01.18
  • Published : 2017.03.20
⟨ Previous Next ⟩

Abstract

The square tubed-reinforced concrete (TRC) column is a kind of special concrete-filled steel tube (CFST) columns, in which the outer thin-walled steel tube does not pass through the beam-column joint, so that the longitudinal steel reinforcing bars in the RC beam are continuous through the connection zone. However, there is a possible decrease of the axial bearing capacity at the TRC column to RC beam connection due to the discontinuity of the column tube, which is a concern to engineers. 24 connections and 7 square TRC columns were tested under axial compression. The primary parameters considered in the tests are: (1) connection location (corner, exterior and interior); (2) dimensions of RC beam cross section; (3) RC beam type (with or without horizontal haunches); (4) tube type (with or without stiffening ribs). The test results show that all specimens have relatively high load-carrying capacity and satisfactory ductility. With a proper design, the connections exhibit higher axial resistance and better ductility performance than the TRC column. The feasibility of this type of connections is verified.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Central Universities

References

  1. Bai, Y., Nie, J.G. and Cai, C.S. (2008), "New connection system for confined concrete columns and beams. II: Theoretical modeling", J. Struct. Eng., ASCE, 134(12), 1800-1809. https://doi.org/10.1061/(ASCE)0733-9445(2008)134:12(1800)
  2. Chen, S.J., Yang, K.C., Lin, K.M. and Wang, C.D. (2011), "Seismic behavior of ductile rectangular composite bridge piers", Earthq. Eng. Struct. D., 40(1), 21-34. https://doi.org/10.1002/eqe.1018
  3. Chen, S.J., Yang, K.C., Lin, K.M. and Wang, C.D. (2012), "Experimental studies of circular composite bridge piers for seismic loading", Steel Compos. Struct., Int. J., 12(3), 261-273. https://doi.org/10.12989/scs.2012.12.3.261
  4. Chen, Q.J., Cai, J., Bradford, M.A., Liu, X. and Zuo, Z.L. (2014), "Seismic behavior of a through-beam connection between concrete-filled steel tubular columns and reinforced concrete beams", Eng. Struct., 80, 24-39. https://doi.org/10.1016/j.engstruct.2014.08.036
  5. Chen, Q.J., Cai, J., Bradford, M.A., Liu, X. and Wu, Y. (2015), "Axial compressive behavior of through-beam connections between concrete-filled steel tubular columns and reinforced concrete beams", J. Struct. Eng., ASCE. DOI: 10.1061/(ASCE)ST.1943-541X.0001249
  6. Han, L.H., Qu, H., Tao, Z. and Wang, Z.F. (2009), "Experimental behavior of thin-walled steel tube confined concrete column to RC beam joints under cyclic loading", Steel Constr., 47(47), 847-857.
  7. Liu, J.P. and Zhou, X.H. (2010), "Behavior and strength of tubed RC stub columns under axial compression", J. Constr. Steel Res., 66(1), 28-36. https://doi.org/10.1016/j.jcsr.2009.08.006
  8. Liu, J.P., Zhang, S.M, Zhang, X.D. and Guo L.H. (2009), "Behavior and strength of circular tube confined reinforcedconcrete (CTRC) columns", J. Constr. Steel Res., 65(7), 1447-58. https://doi.org/10.1016/j.jcsr.2009.03.014
  9. Liu, J.P., Wang, X.D. and Zhang, S.M. (2015), "Behavior of square tubed reinforced-concrete short columns subjected to eccentric compression", Thin Wall. Struct., 91, 108-115. https://doi.org/10.1016/j.tws.2015.01.023
  10. Nie, J.G., Bai, Y. and Cai, C.S. (2008), "New connection system for confined concrete columns and beams. I: Experimental study", J. Struct. Eng., ASCE, 134(12), 1787-1799. https://doi.org/10.1061/(ASCE)0733-9445(2008)134:12(1787)
  11. Sakino, K. and Sun, Y.P. (2000), "Steel jacketing for improvement of column strength and ductility", Proceedings of the 12th World Conference on Earthquake Engineering, Auckland, New Zealand, January.
  12. Tomii, M., Sakino, K., Xiao, Y. and Watanabe, K. (1985), "Earthquake resisting hysteretic behaviour of reinforced concrete short columns confined by steel tube", Proceedings of the International Speciality Conference on Concrete Filled Steel Tubular Structures, Harbin, China, August.
  13. Wang, X.D., Liu, J.P. and Zhang, S.M. (2015), "Behavior of short circular tubed-reinforced-concrete columns subjected to eccentric compression", Eng. Struct., 105, 77-86. https://doi.org/10.1016/j.engstruct.2015.10.001
  14. Yu, Q., Tao, Z., Liu, W. and Chen, Z.B. (2010), "Analysis and calculations of steel tube confined concrete (STCC) stub columns", J. Constr. Steel Res., 66(1), 53-64. https://doi.org/10.1016/j.jcsr.2009.08.003
  15. Zhang, S.M., Guo, L.H., Ye, Z.L. and Wang, Y.Y. (2005), "Behavior of steel tube and confined high strength concrete for concrete-filled RHS tubes", Adv. Struct. Eng., 8(2), 101-116. https://doi.org/10.1260/1369433054037976
  16. Zhang, Y.F., Zhao, J.H. and Cai, C.S. (2012), "Seismic behavior of ring beam joints between concrete-filled twin steel tubes columns and reinforced concrete beams", Eng. Struct., 39, 1-10. https://doi.org/10.1016/j.engstruct.2012.01.014
  17. Zhou, X.H. and Liu, J.P. (2010), "Seismic behavior and shear strength of tubed RC short columns", J. Constr. Steel Res., 66(3), 385-397. https://doi.org/10.1016/j.jcsr.2009.10.011

Cited by

  1. Experimental Behavior of Square Tubed-Reinforced-Concrete Column to RC Beam Joints with Internal Diaphragms under Cyclic Loading vol.763, pp.1662-9795, 2018, https://doi.org/10.4028/www.scientific.net/KEM.763.779
  2. Strengthening of deficient steel SHS columns under axial compressive loads using CFRP vol.30, pp.1, 2017, https://doi.org/10.12989/scs.2019.30.1.069
  3. Local compressive behavior of joint core reinforced with ring beam for connection of polyvinyl chloride fiber‐reinforced polymer confined concrete column and reinforced concrete beam vol.21, pp.4, 2017, https://doi.org/10.1002/suco.201900312
  4. Experimental study on low-strength concrete joint core strengthened with steel meshes for connecting PFCC column and RC beam vol.24, pp.4, 2021, https://doi.org/10.1177/1369433220969028