Earthquakes and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Seismic behavior of full-scale square concrete filled steel tubular columns under high and varied axial compressions

  • Phan, Hao D. (Faculty of Civil Engineering, The University of Danang - University of Science and Technology) ;
  • Lin, Ker-Chun (Department of Civil and Construction Engineering, National Taiwan University of Science and Technology)
  • Received : 2019.12.30
  • Accepted : 2020.06.09
  • Published : 2020.06.25
⟨ Previous Next ⟩

Abstract

A building structural system of moment resisting frame (MRF) with concrete filled steel tubular (CFST) columns and wide flange H beams, is one of the most conveniently constructed structural systems. However, there were few studies on evaluating seismic performance of full-scale CFST columns under high axial compression. In addition, some existing famous design codes propose various limits of width-to-thickness ratio (B/t) for steel tubes of the ductile CFST composite members. This study was intended to investigate the seismic behavior of CFST columns under high axial load compression. Four full-scale square CFST column specimens with a B/t of 42 were carried out that were subjected to horizontal cyclic-reversal loads combined with constantly light, medium and high axial loads and with a linearly varied axial load, respectively. Test results revealed that shear strength and deformation capacity of the columns significantly decreased when the axial compression exceeded 0.35 times the nominal compression strength of a CFST column, P0. It was obvious that the higher the axial compression, the lower both the shear strength and deformation capacities were, and the earlier and faster the shear strength degradation occurred. It was found as well that higher axial compressions resulted in larger initial lateral stiffness and faster degradation of post-yield lateral stiffness. Meanwhile, the lower axial compressions led to better energy dissipation capacities with larger cumulative energy. Moreover, the study implied that under axial compressions greater than 0.35P0, the CFST column specimens with B/t limits recommended by AISC 360 (2016), ACI 318 (2014), AIJ (2008) and EC4 (2004) codes do not provide ultimate interstory drift ratio of more than 3% radian, and only the limit in ACI 318 (2014) code satisfies this requirement when axial compression does not exceed 0.35P0.

Keywords

Acknowledgement

The authors greatly appreciate the financial support provided by the National Center for Research on Earthquake Engineering (NCREE), Taiwan. The authors also would like to send many thanks to the staff and technicians of NCREE for their enthusiastic supports and hard efforts as well.

References

  1. Uy, B. (1998), "Concrete-filled fabricated steel box columns for multistorey buildings: behaviour and design", Prog. Struct. Eng. Mat., 1(2), 150-158. https://doi.org/10.1002/pse.2260010207.
  2. Boyd, P.F., Cofer, W.F. and Mclean, D.I. (1995), "Seismic performance of steel-encased concrete columns under flexural loading", ACI Struct. J., 92(3), 355-364.
  3. Fam, A., Qie, F.S. and Rizkalla, S. (2004), "Concrete-filled steel tubes subjected to axial compression and lateral cyclic loads", J. Struct. Eng., 130(4), 631-640. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:4(631).
  4. Han, L.H., Yang, Y.F. and Tao, Z. (2003), "Concrete-filled thin-walled steel SHS and RHS beam-columns subjected to cyclic loading", Thin Walled Struct., 41(9), 801-833. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:4(631).
  5. Fujimoto, T., Mukai, A., Nishiyama, I. and Sakino, K. (2004), "Behavior of eccentrically loaded concrete-filled steel tubular columns", J. Struct. Eng., 130(2), 203-212. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:2(203).
  6. Inai, E., Mukai, A., Kai, M., Tokinoya, H., Fukumoto, T. and Mori, K. (2004), "Behavior of concrete-filled steel tube beam columns", J. Struct. Eng., 130(2), 189-202. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:2(189).
  7. Varma, A.H., Ricles, J.M., Sause, R. and Lu, L.W. (2002a), "Experimental behavior of high strength square concrete-filled steel tube beam-columns", J. Struct. Eng., 128(3), 309-318. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:3(309).
  8. Varma, A.H., Ricles, J.M., Sause, R. and Lu, L.W. (2002b), "Seismic behavior and modeling of high-strength composite concrete-filled steel tube (CFT) beam-columns", J. Construct. Steel Res., 58(5-8), 725-758. https://doi.org/10.1016/S0143-974X(01)00099-2.
  9. Varma, A.H., Ricles, J.M., Sause, R. and Lu, L.W. (2004), "Seismic behavior and design of high-strength square concrete-filled steel tube beam columns", J. Struct. Eng., 130(2), 169-179. https://doi.org/10.1016/S0143-974X(01)00099-2.
  10. Varma, A.H., Sause, R., Ricles, J.M. and Li, Q. (2005), "Development and validation of fiber model for high-strength square concrete-filled steel tube beam-columns", ACI Struct. J. Amer. Concrete Institute, 102(1), 73-84.
  11. AISC 360 (2016), "Specification for structural steel buildings", American Institute of Steel Construction; Chicago, U.S.A.
  12. ACI 318 (2014), "Building code requirements for structural concrete and commentary", American Concrete Institute; Farmington Hills, U.S.A.
  13. AIJ (2008), "Recommendations for design and construction of concrete filled steel tubular structures", Architectural Institute of Japan.
  14. Eurocode (EC) 4 (2004), "Design of composite steel and concrete structures - Part 1-1: General rules and rules for buildings", European Committee for Standardization; Brussels, Belgium.
  15. AISC 341 (2016), "Seismic provisions for structural steel buildings", American Institute of Steel Construction; Chicago, U.S.A.
  16. Eurocode (EC) 8 (2004), "Design of structures for earthquake resistance - Part 1: General rules, seismic actions and rules for buildings", European Committee for Standardization; Brussels, Belgium.
  17. Thai, S., Thai, H.T., Uy, B. and Ngo, T. (2019), "Concrete-filled steel tubular columns: Test database, design and calibration", J. Construct. Steel Res., 157, 161-181. https://doi.org/10.1016/j.jcsr.2019.02.024.
  18. AASHTO (2008), "Standard test methods for tension testing of metallic materials (E8/E8M-08)", American Association State Highway and Transportation Officials, West Conshohocken, U.S.A.
  19. Zhang, Y., Xu, C. and Lu, X. (2007), "Experimental study of hysteretic behaviour for concrete-filled square thin-walled steel tubular columns", J. Construct. Steel Res., 63(3), 317-325. https://doi.org/10.1016/j.jcsr.2006.04.014.
  20. Johansson, M. and Gylltoft, K. (2002), "Mechanical behavior of circular steel-concrete composite stub columns", J. Struct. Eng., 128(8), 1073-1081. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:8(1073).
  21. Phan, H.D. and Trinh, H.H. (2016), "Analysis of mechanical behaviour of circular concrete filled steel tube columns using high strength concrete", The Proceedings of the 24th Australian Conference on the Mechanics of Structures and Materials, Perth, Australia, December.
  22. de Oliveira, W.L.A., Nardin, S.D., de Cresce El Debs, A.L.H. and Debs, M.K.E. (2009), "Influence of concrete strength and length/diameter on the axial capacity of CFT columns", J. Construct. Steel Res., 65(12), 2103-2110. https://doi.org/10.1016/j.jcsr.2009.07.004.
  23. Chopra, A.K. (2012), "Dynamics of Structures: Theory and Applications to Earthquake Engineering", Prentice Hall, Upper Saddle River, U.S.A.
  24. Calvi, G.M., Priestley, M.J.N. and Kowalsky, M.J. (2007), "Displacement-based seismic design of structures", The Proceedings of the New Zealand Conference on Earthquake Engineering, Wellington, New Zealand, November.

Cited by

  1. Seismic performance and damage evaluation of spiral ribbed thin-walled concrete filled and encased steel tube composite columns vol.20, pp.6, 2020, https://doi.org/10.12989/eas.2021.20.6.669