DOI QR코드

DOI QR Code

Effect of spiral spacing on axial compressive behavior of square reinforced concrete filled steel tube (RCFST) columns

  • Qiao, Qiyun (College of Architecture and Civil Engineering, Beijing University of Technology) ;
  • Zhang, Wenwen (College of Architecture and Civil Engineering, Beijing University of Technology) ;
  • Mou, Ben (School of Civil Engineering, Qingdao University of Technology) ;
  • Cao, Wanlin (College of Architecture and Civil Engineering, Beijing University of Technology)
  • 투고 : 2018.06.08
  • 심사 : 2019.05.10
  • 발행 : 2019.06.25

초록

Spiral spacing effect on axial compressive behavior of reinforced concrete filled steel tube (RCFST) stub column is experimentally investigated in this paper. A total of twenty specimens including sixteen square RCFST columns and four benchmarked conventional square concrete filled steel tube (CFST) columns are fabricated and tested. Test variables include spiral spacing (spiral ratio) and concrete strength. The failure modes, load versus displacement curves, compressive rigidity, axial compressive strength, and ductility of the specimens are obtained and analyzed. Especially, the effect of spiral spacing on axial compressive strength and ductility is investigated and discussed in detail. Test results show that heavily arranged spirals considerably increase the ultimate compressive strength but lightly arranged spirals have no obvious effect on the ultimate strength. In practical design, the effect of spirals on RCFST column strength should be considered only when spirals are heavily arranged. Spiral spacing has a considerable effect on increasing the post-peak ductility of RCFST columns. Decreasing of the spiral spacing considerably increases the post-peak ductility of the RCFSTs. When the concrete strength increases, ultimate strength increases but the ductility decreases, due to the brittleness of the higher strength concrete. Arranging spirals, even with a rather small amount of spirals, is an economical and easy solution for improving the ductility of RCFST columns with high-strength concrete. Ultimate compressive strengths of the columns are calculated according to the codes EC4 (2004), GB 50936 (2014), AIJ (2008), and ACI 318 (2014). The ultimate strength of RCFST stub columns can be most precisely evaluated using standard GB 50936 (2014) considering the effect of spiral confinement on core concrete.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

참고문헌

  1. ACI 318 (2014), Building Code Requirements for Structural Concrete and Commentary; American Concrete Institute, Farmington Hills, MI, USA.
  2. AIJ (2008), Recommendations for design and construction of concrete filled steel tubular structures; Architectural Institute of Japan, Tokyo, Japan.
  3. AISC (2016), Specification for Structural Steel Buildings; American Institution of Steel Construction, Chicago, IL, USA.
  4. Ding, F.X., Lu, D.R., Bai, Y., Zhou, Q.S., Ni, M., Yu, Z.W. and Jiang, G.S. (2016), "Comparative study of square stirrupconfined concrete-filled steel tubular stub columns under axial loading", Thin-Wall. Struct., 98, 443-453. https://doi.org/10.1016/j.tws.2015.10.018
  5. Eurocode 4 (2004), Design of Composite Steel and Concrete Structures; European Committee for Standardization, British Standards Institution, London, UK.
  6. GB 50010 (2010), Code for design of concrete structures; China Architecture & Building Press, Beijing, China.
  7. GB 50936 (2014), Technical code for concrete filled steel tubular structures; China Architecture & Building Press, Beijing, China.
  8. GB/T 50081 (2002), Standard for Method of Mechanical Properties on Ordinary Concrete; China Building Industry Press, Beijing, China.
  9. Hamidian, M.R., Jumaat, M.Z., Alengaram, U.J., Sulong, N.H.R. and Shafigh, P. (2016), "Pitch spacing effect on the axial compressive behaviour of spirally reinforced concrete-filled steel tube (SRCFT)", Thin-Wall. Struct., 100, 213-223. https://doi.org/10.1016/j.tws.2015.12.011
  10. Han, L.H. (2002), "Tests on stub columns of concrete-filled RHS sections", J. Constr. Steel Res., 58(3) 353-372. https://doi.org/10.1016/S0143-974X(01)00059-1
  11. Han, L.H., Ren, Q.X. and Li, W. (2010), "Tests on inclined, tapered and STS concrete-filled steel tubular (CFST) stub columns", J. Constr. Steel Res., 66(10), 1186-1195. https://doi.org/10.1016/j.jcsr.2010.03.014
  12. Hassan, M.M., Mahmoud, A.A. and Serror, M.H. (2016), "Behavior of concrete-filled double skin steel tube beamcolumns", Steel Compos. Struct., Int. J., 22(5), 1141-1162. https://doi.org/10.12989/scs.2016.22.5.1141
  13. Huo, J.S., Huang, G.W. and Xiao, Y. (2009), "Effects of sustained axial load and cooling phase on post-fire behaviour of concretefilled steel tubular stub columns", J. Constr. Steel Res., 65(8-9), 1664-1676. https://doi.org/10.1016/j.jcsr.2009.04.022
  14. Lee, H.J., Choi, I.R. and Park, H.G. (2017), "Eccentric compression strength of rectangular concrete-filled tubular columns using high-strength steel thin plates", J. Struct. Eng., 143(5), 1-11. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001724
  15. Liu, H.L. and Cai, J. (2013), "Research on behavior of rectangular CFST stub columns with binding bars under axial compression", Proceedings of the 3rd International Conference on Civil Engineering, Architecture and Building, Jinan, China, May.
  16. Krishan, A.L., Troshkina, E.A. and Astafyeva, M.A. (2017), "Strength of short concrete filled steel tube columns with spiral reinforcement", Proceedings of the International Conference on Construction, Architecture and Technosphere Safety (ICCATS), Chelyabinsk, Russia, September.
  17. Marvel, L., Doty, N., Lindquist, W. and Hindi, R. (2014), "Axial behavior of high-strength concrete confined with multiple spirals", Eng. Struct., 60, 68-80. https://doi.org/10.1016/j.engstruct.2013.12.019
  18. Moon, J., Lehman, D.E., Roeder, C.W. and Lee, H.E. (2013), "Strength of Circular Concrete-Filled Tubes with and without Internal Reinforcement under Combined Loading", J. Struct. Eng., 139(12), 1-12. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000788
  19. Mou, B. and Bai, Y.T. (2018), "Experimental investigation on shear behavior of steel beam-to-CFST column connections with irregular panel zone", Eng. Struct., 168(08), 487-504. https://doi.org/10.1016/j.engstruct.2018.04.029
  20. Mou, B., Pang, L.Y., Qiao, Q.Y. and Yang Y.T. (2018), "Experimental investigation on unequal-depth-beam-to column joints with t-shape connector", Eng. Struct., 174(11), 663-674. https://doi.org/10.1016/j.engstruct.2018.05.010
  21. Nilson, A.H., Darwin, D. and Dolan, C.W. (2009), Design of Concrete Structure, McGraw Hill Education, New York, NY, USA.
  22. Pons, D., Espinos, A., Albero, V. and Romero, M.L. (2018), "Numerical study on axially loaded ultra-high strength concrete-filled dual steel columns", Steel Compos. Struct., Int. J., 26(6), 705-717. https://doi.org/10.12989/scs.2018.26.6.705
  23. Qiao, Q.Y., Zhang, W.W., Mou, B. and Cao, W.L. (2019), "Seismic behavior of exposed concrete filled steel tube column bases with embedded reinforcing bars: Experimental investigation", Thin-Wall. Struct., 136(3), 367-381. https://doi.org/10.1016/j.tws.2018.12.039
  24. Qu, X.S., Chen, Z.H. and Sun, G.J. (2015), "Axial behaviour of rectangular concrete-filled cold-formed steel tubular columns with different loading methods", Steel Compos. Struct., Int. J., 18(1), 71-90. https://doi.org/10.12989/scs.2015.18.1.071
  25. Ritchie, C.B., Packer, J.A., Seica, M.V. and Zhao, X.L. (2018), "Flexural behavior of concrete-filled double-skin tubes subject to blast loading", J. Struct. Eng., 144(7), 1-19. https://doi.org/10.1061/(ASCE)ST.1943-541X.0002064
  26. Wei, H., Wang, H.J. and Hasegawa, A. (2014), "Experimental study on reinforced concrete filled circular steel tubular columns", Steel Compos. Struct., Int. J., 17(4), 517-533. https://doi.org/10.12989/scs.2014.17.4.517
  27. Xiamuxi, A. and Hasegawa, A. (2012), "A study on axial compressive behaviors of reinforced concrete filled tubular steel columns", J. Constr. Steel Res., 76, 144-154. https://doi.org/10.1016/j.jcsr.2012.03.023

피인용 문헌

  1. Non-linear FEA of mechanical properties of modular prefabricated steel-concrete composite joints vol.40, pp.4, 2019, https://doi.org/10.12989/scs.2021.40.4.533