Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Seismic performance of RC columns with encased prefabricated high-strength CFST core

  • Yang, Yong (School of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • Sun, Dongde (School of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • Xue, Yicong (School of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • Yu, Yunlong (School of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • An, Kang (School of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • Chen, Yang (School of Civil Engineering, Xi'an University of Architecture & Technology)
  • Received : 2019.12.12
  • Accepted : 2020.11.02
  • Published : 2021.06.25
⟨ Previous Next ⟩

Abstract

This paper proposed an innovative RC column with encased prefabricated high-strength concrete filled steel tube core, and four RC columns with encased prefabricated high-strength CFST core and a RC control-column were tested under lateral low cyclic loading. All specimens were evaluated by the cracks developments, failure patterns, hysteretic behavior, skeleton curves, strength and stiffness degradation, ductility and energy dissipation capacity. The effects of stirrup ratio and welding studs of prefabricated CFST core were investigated in details. The experiment results indicated that compared with the RC control-column, the performances of RC columns with encased prefabricated high-strength CFST core, including the hysteretic behavior, strength degradation, ductility and energy dissipation, were significantly improved. Higher stirrup ratio of the RC column with encased prefabricated high-strength CFST core leaded to higher ductility and more satisfactory energy dissipation capacity, stiffness degradation. Studs could effectively combine prefabricated high-strength CFST core and surrounding concrete, which significantly increase the integrity of RC column with encased prefabricated high-strength CFST core. Based on the test results, a numerical model was established to further analyze the cyclic behavior of the test specimens, and the numerical results agreed well with the test results, which showed the feasibility for the further parametric study. Finally, on the basis of the plastic stress theory, a calculation model for seismic bending moment capacity of RC column with encased prefabricated high-strength CFST core was established, and the results obtained form the formulas showed good agreement with the experiments.

Keywords

Acknowledgement

The research described in this paper was financially supported by the Natural Science Foundation of China (Program No.51578443 and No. 51778525).

References

  1. ACI 318 (2014), Building code requirements for structural concrete and commentary, American Concrete Institute; Farmington Hill, MI, USA.
  2. Agheshlui, H., Goldsworthy, H., Gad, E. and Mirza, O. (2017), "Anchored blind bolted composite connection to a concrete filled steel tubular column", Steel Compos. Struct., 23(1), 115-130. https://doi.org/10.12989/scs.2017.23.1.115.
  3. Aslani, F., Uy, B., Wang, Z. and Patel, V. (2016), "Confinement models for high strength short square and rectangular concrete-filled steel tubular columns", Steel Compos. Struct., 22(5), 937-974. https://doi.org/10.12989/scs.2016.22.5.937.
  4. Chen, C., Wang, C. and Sun, H. (2014), "Experimental study on seismic behavior of full encased steel-concrete composite columns", J. Struct. Eng., 140(6), 1-10. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000951.
  5. Ding, F., Wen, B., Liu, X. and Wang, H. (2017), "Composite action of notched circular CFT stub columns under axial compression", Steel Compos. Struct., 24(3), 309-322. https://doi.org/10.12989/scs.2017.24.3.309.
  6. El-Tawil, S. and Deierlein, G. (1999), "Strength and ductility of concrete encased composite columns", J. Struct. Eng., 125(9), 1009-1019. https://doi.org/10.1061/(ASCE)0733-9445(1999)125:9(1009).
  7. Ellobody, E., Young, B. and Lam, D. (2011), "Eccentrically loaded concrete encased steel composite columns", Thin-Wall. Struct., 49, 53-65. https://doi.org/10.1016/j.tws.2010.08.006.
  8. Espinos, A., Albero, V., Romero, M.L., Mund, M., Meyer, P. and Schaumann, P. (2019), "Non-constant biaxial bending capacity assessment of CFST columns through interaction diagrams", Steel Compos. Struct., 32(4), 521-536. https://doi.org/10.12989/scs.2019.32.4.521.
  9. Espinos, A., Albero, V., Romero, M.L., Mund, M., Kleiboemer, I., Meyer, P. and Schaumann, P. (2018), "Numerical investigation on slender concrete-filled steel tubular columns subjected to biaxial bending", Proceedings of the 12th International Conference on Advances in Steel-Concrete Composite Structures (ASCCS 2018), Valencia (Spain). https://doi.org/10.4995/ASCCS2018.2018.7177.
  10. Eurocode 4 (2004), Design of composite steel and concrete structures, part 1-1, general rules and rues for building, European Committee for Standardization; Brussels, Belgium.
  11. Foraboschi, P. (2014), "Three-layered plate: elasticity solution", Com. Part. Eng., 60, 764-774. https://doi.org/10.1016/j.compositesb.2013.06.037.
  12. GB/T 50010-2010 (2010), Code for design of concrete structures, China Architecture and Building Press; Beijing, China. (in Chinese)
  13. Hajjar, J.F. (2002), "Composite steel and concrete structural systems for seismic engineering", J. Constr. Steel Res., 58(5), 703-723. https://doi.org/10.1016/S0143-974X(01)00093-1.
  14. Han, L. and An, L. (2014), "Performance of concrete-encased CFST stub columns under axial compression", J. Constr. Steel Res., 93, 62-76. https://doi.org/10.1016/j.jcsr.2013.10.019.
  15. Han, L., Li, W. and Bjorhovde, R. (2014), "Developments and advanced applications of concrete filled steel tubular (CFST) structures: Members", J. Constr. Steel. Res., 100, 211-228. https://doi.org/10.1016/j.jcsr.2014.04.016.
  16. Huang, L., Xu, L., Chi, Y. and Xu, H. (2015), "Experimental investigation on the seismic performance of steel-polypropylene hybrid fiber reinforced concrete columns", Constr. Build. Mater., 87, 16-27. https://doi.org/10.1016/j.conbuildmat.2015.03.073.
  17. Hwang, J.H., Lee, D.H., Oh, J.Y., Choi, S.H., Kang, S.K. and Seo, S.Y. (2016), "Seismic performances of centrifugally-formed hollow-core precast columns with multi-interlocking spirals", Steel Compos. Struct., 20(6), 1259-1274. https://doi.org/10.12989/scs.2016.20.6.1259.
  18. Jaillon, L. and Poon, C.S. (2010), "Design issues of using prefabrication in Hong Kong building construction", Constr. Manag. Econ., 28(10), 1025-1042. https://doi.org/10.1080/01446193.2010.498481.
  19. JGJ138 (2016), Code for design of composite structures, China Building Industry Press; Beijing, China. (in Chinese)
  20. Johnson RP (2004), Composite Structures of Steel and Concrete: Beams, Slabs, Columns, and Frames for Buildings, Blackwell Publishing, Malden, MA and Oxford, UK.
  21. Lai, B., Liew, J.Y.R. and Wang, T. (2019), "Buckling behaviour of high strength concrete encased steel composite columns", J. Constr. Steel Res., 154, 27-42. https://doi.org/10.1016/j.jcsr.2018.11.023.
  22. Ma, D., Han, L., Ji, X. and Yang W. (2018), "Behaviour of hexagonal concrete-encased CFST columns subjected to cyclic bending" J. Constr. Steel Res., 144, 283-294. https://doi.org/10.1016/j.jcsr.2018.01.019.
  23. Mirza, S. and Lacroix, E. (2004), "Comparative strength analyses of concrete-encased steel composite columns", J. Struct. Eng., 130(12), 1941-1953. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:12(1941).
  24. Razvi, S.R. and Saatcioglu, M. (1996), "Test of high-strength concrete columns under concentric loading", Research Report No. OCEERC 96-03; Ottawa Carleton Earthquake Engineering Research Centre, Ottawa, Ontario, Canada.
  25. Shi, Q., Yang, K., Liu, W., Zhang, X. and Jiang, W. (2012), "Experimental study on mechanical behavior of high strength concrete confined by high-strength stirrups under concentric loading", Eng. Mech., 29(1), 141-149. (in Chinese)
  26. Tam, V., Tam, C., Zeng, S. and Ng, W. (2006), "Towards adoption of prefabrication in construction", Build Environ., 42(10), 3642-3654. https://doi.org/10.1016/j.buildenv.2006.10.003.
  27. Wang, K., Yuan, S., Chen, Z., Zhi, H. and Shi G. (2016), "Experimental study on hysteretic behavior of composite frames with concrete-encased CFST columns", J. Constr. Steel Res., 123, 110-120. https://doi.org/10.1016/j.jcsr.2016.04.024.
  28. Wang, Z., Han, L., Li, W. and Tao, Z. (2016), "Seismic performance of concrete-encased CFST piers: experimental study", J. Bridge Eng., 21(4), 65-74. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000841.
  29. Wang, Z., Li, L., Zhang, Y. and Zheng, S. (2019), "Reinforcement model considering slip effect", Eng. Struct., 198, 63-75. https://doi.org/10.1016/j.engstruct.2019.109493.
  30. Xu, L. and Liu, Y. (2013), "Concrete filled steel tube reinforced concrete (CFSTRC) columns subjected to ISO-834 standard fire: Experiment", Adv. Struct. Eng., 16(7), 1263-1282. https://doi.org/10.1260/1369-4332.16.7.1263.
  31. Yang, Y., Du, X., Yu, Y. and Pan, Y. (2019), "Experimental study on the seismic performance of composite columns with an ultra-high-strength concrete-filled steel tube core", Adv. Struct. Eng., 23(4), 794-809. https://doi.org/10.1177/1369433219879805.
  32. Yang, Y., Xue, Y., Yu, Y. and Gao, F. (2018), "Experimental study on seismic performance of partially precast steel reinforced concrete columns", Eng. Struct., 175, 63-75. https://doi.org/10.1016/j.engstruct.2018.08.027.