Steel and Composite Structures

  • 제31권1호
  • /
  • Pages.13-25
  • /
  • 2019
  • /
  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Axial capacity of reactive powder concrete filled steel tube columns with two load conditions

  • Wang, Qiuwei (State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology) ;
  • Shi, Qingxuan (State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology) ;
  • Xu, Zhaodong (College of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • He, Hanxin (College of Civil Engineering, Xi'an University of Architecture and Technology)
  • 투고 : 2018.07.13
  • 심사 : 2019.03.21
  • 발행 : 2019.04.10
⟨ 이전 논문 다음 논문 ⟩

초록

Reactive powder concrete (RPC) is a type of ultra-high strength concrete that has a relatively high brittleness. However, its ductility can be improved by confinement, and the use of RPC in composite RPC filled steel tube columns has become an important subject of research in recent years. This paper aims to present an experimental study of axial capacity calculation of RPC filled circular steel tube columns. Twenty short columns under axial compression were tested and information on their failure patterns, deformation performance, confinement mechanism and load capacity were presented. The effects of load conditions, diameter-thickness ratio and compressive strength of RPC on the axial behavior were further discussed. The experimental results show that: (1) specimens display drum-shaped failure or shear failure respectively with different confinement coefficients, and the load capacity of most specimens increases after the peak load; (2) the steel tube only provides lateral confinement in the elastic-plastic stage for fully loaded specimens, while the confinement effect from steel tube initials at the set of loading for partially loaded specimens; (3) confinement increases the load capacity of specimens by 3% to 38%, and this increase is more pronounced as the confinement coefficient becomes larger; (4) the residual capacity-to-ultimate capacity ratio is larger than 0.75 for test specimens, thus identifying the composite columns have good ductility. The working mechanism and force model of the composite columns were analyzed, and based on the twin-shear unified strength theory, calculation methods of axial capacity for columns with two load conditions were established.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

참고문헌

  1. Abdulkareem, O.M., Fraj, A.B., Bouasker, M. and Khelidj, A. (2018), "Mixture design and early age investigations of more sustainable UHPC", Constr. Build. Mater., 163(28), 235-246. https://doi.org/10.1016/j.conbuildmat.2017.12.107
  2. Abid, M., Hou, X.M., Zheng, W.Z. and Hussain, R.R. (2017), "High temperature and residual properties of reactive powder concrete - A review", Constr. Build. Mater., 147, 339-351. https://doi.org/10.1016/j.conbuildmat.2017.04.083
  3. Aslani, F., Uy, B., Zhong, T. and Mashiri, F. (2015), "Predicting the axial load capacity of high-strength concrete filled steel tubular columns", Steel Compos. Struct., Int. J., 19(4), 967-993. https://doi.org/10.12989/scs.2015.19.4.967
  4. Chen, J., Liu, X., Liu, H.W. and Zeng, L. (2018), "Axial compression of circular recycled concrete-filled steel tubular short columns reinforced by silica fume and steel fiber", Steel Compos. Struct., Int. J., 27(2), 193-200.
  5. Choi, I.P., Chung, K.S. and Kim, C.S. (2017), "Experimental study on rectangular CFT columns with different steel grades and thicknesses", J. Constr. Steel Res., 130, 109-119. https://doi.org/10.1016/j.jcsr.2016.12.013
  6. Du, Y.S., Chen, Z.H., Zhang, C.Q. and Cao, X.C. (2017), "Research on axial bearing capacity of rectangular concretefilled steel tubular columns based on artificial neural network", Front. Comput. Sci., 11(5), 863-873. https://doi.org/10.1007/s11704-016-5113-6
  7. Evirgen, B., Tuncan, A. and Taskin, K. (2014), "Structural behavior of concrete filled steel tubular sections (CFT/CFST) under axial compression", Thin Wall. Struct., 80, 46-56. https://doi.org/10.1016/j.tws.2014.02.022
  8. Feng, J.W. (2008), "Study on mechanical behavior of reactive powder concrete filled steel tubular columns", Ph.D. Dissertation; Tsinghua University, Beijing, China. [In Chinese]
  9. GB 175 (2007), Common Portland Cement; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Beijing, China.
  10. GB/T 31387 (2015), Reactive Powder Concrete; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Beijing, China.
  11. Guler, S., Copur, A. and Aydogan, M. (2013), "Axial capacity and ductility of circular UHPC-filled steel tube columns", Mag. Concrete Res., 65(15), 898-905. https://doi.org/10.1680/macr.12.00211
  12. Han, L.H. and An, Y.F. (2014), "Performance of concrete-encased CFST stub columns under axial compression", Int. J. Concr. Struct. M., 93, 62-76.
  13. Hoang, A.L. and Fehling, E. (2017), "Influence of steel fiber content and aspect ratio on the uniaxial tensile and compressive behavior of ultra high performance concrete", Constr. Build. Mater., 153, 790-806. https://doi.org/10.1016/j.conbuildmat.2017.07.130
  14. Huang, F.Y., Yu, X.M. and Chen, B.C. (2012), "The structural performance of axially loaded CFST columns under various loading conditions", Steel Compos. Struct., Int. J., 13(5), 451-471. https://doi.org/10.12989/scs.2012.13.5.451
  15. Huynh, L., Foster, S., Valipour, H. and Randall, R. (2015), "High strength and reactive powder concrete columns subjected to impact: Experimental investigation", Constr. Build. Mater., 78(1), 153-171. https://doi.org/10.1016/j.conbuildmat.2015.01.026
  16. Li, H. and Liu, G. (2016), "Tensile properties of hybrid fiberreinforced reactive powder concrete after exposure to elevated temperatures", Int. J. Concr. Struct. M., 10(1), 29-37. https://doi.org/10.1007/s40069-016-0125-z
  17. Liang, W., Dong, J.F. and Wang, Q.Y. (2018), "Axial compressive behavior of concrete-filled steel tube columns with stiffeners", Steel Compos. Struct., Int. J., 29(2), 151-159.
  18. Lin, Z.Y., Wu, Y.H. and Shen, Z.Y. (2005), "Research on behavior of RPC filled circular steel tube column subjected to axial compression", J. Build. Struct., 26(4), 52-57. [In Chinese] https://doi.org/10.3321/j.issn:1000-6869.2005.04.008
  19. Luo, H., Ji, W.Y., Yan, Z.G. and Li, W.W. (2014), "Research on influence of loading methods on compression behavior of reactive powder concrete filled steel tube stub columns under axial loads", J. China. Railway. Soc., 36(9), 105-110. [In Chinese]
  20. Luo, H., Wang, W.W., Shen, L. and Wang, G.H. (2017), "Stressstrain model for reactive powder concrete confined by steel tube", J. Eng. Sci. Technol. Rev., 10(2), 122-131. https://doi.org/10.25103/jestr.102.15
  21. Min, Y., Zha, X.X., Ye, J.P. and Li, Y.T. (2013), "A unified formulation for circle and polygon concrete-filled steel tube columns under axial compression", Eng. Struct., 49(2), 1-10. https://doi.org/10.1016/j.engstruct.2012.10.018
  22. Sanchayan, S. and Foster, S.J. (2016), "High temperature behavior of hybrid steel-PVA fiber reinforced reactive powder concrete", Mater. Struct., 49(3), 769-782. https://doi.org/10.1617/s11527-015-0537-2
  23. Shan, B., Lai, D.D., Xiao, Y. and Luo, X.B. (2018), "Experimental research on concrete-filled RPC tubes under axial compression load", Eng. Struct., 155(15), 358-370. https://doi.org/10.1016/j.engstruct.2017.11.012
  24. Shi, C.H., Cao, C.Y., Long, G.C. and Lei, M.F. (2017), "Mechanical property test and analytical method for reactive powder concrete columns under eccentric compression", KSCE J. Civil Eng., 21(4), 1307-1318. https://doi.org/10.1007/s12205-016-1524-z
  25. Thomas, J. and Sandeep, T.N. (2018), "Experimental study on circular CFST short columns with intermittently welded stiffeners", Steel Compos. Struct., Int. J., 29(5), 659-667.
  26. Wang, Q.W., Wang, Z.W. and Tao, Y. (2017), "Experimental research on effect of mix ratio and curing system on the strength of reactive powder concrete", J. Xi'an Univ. of Arch. Tech., 49(3), 382-387. [In Chinese]
  27. Yan, K., Xu, C. and Zhang, X. (2016), "Compressive behavior of steel fiber-reinforced reactive powder concrete at elevated temperatures", Sci. Adv. Mater., 8(7), 1454-1463. https://doi.org/10.1166/sam.2016.2758
  28. Yigiter, H., Aydin, S. and Yardimci, M.Y. (2012), "Mechanical performance of low cement reactive powder concrete (LCRPC)", Compos. Part B-Eng., 43 (8), 2907-2914. https://doi.org/10.1016/j.compositesb.2012.07.042
  29. Zhang, J. (2003), "Experimental investigation on behavior of reactive powder concrete filled steel stub columns", Ph. D. Dissertation; Fuzhou University, Fuzhou, China. [In Chinese]
  30. Zheng, W.Z., Luo, B.F. and Wang, Y. (2015), "Stress-strain relationship of steel - fibre reinforced reactive powder concrete at elevated temperatures", Mater. Struct., 48, 2299-2314. https://doi.org/10.1617/s11527-014-0312-9