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Compressive behaviour of circular steel tube-confined concrete stub columns with active and passive confinement

  • Received : 2016.09.27
  • Accepted : 2017.04.07
  • Published : 2017.06.30

Abstract

This paper presents the results of a comprehensive experimental investigation on the compressive behaviour of steel tube-confined concrete (STCC) stub columns with active and passive confinement. To create active confinement in STCC columns, an innovative technique is used in which steel tube is laterally pre-tensioned while the concrete core is simultaneously pre-compressed by applying pressure on fresh concrete. A total of 135 STCC specimens with active and passive confinement are tested under axial compression load and their compressive strength, ultimate strain capacity, axial and lateral stress-strain curves and failure mode are evaluated. The test variables include concrete compressive strength, outer diameter to wall thickness ratio of steel tube and prestressing level. It is shown that applying active confinement on STCC specimens can considerably improve their mechanical properties. However, applying higher prestressing levels and keeping the applied pressure for a long time do not considerably affect the mechanical properties of actively confined specimens. Based on the results of this study, new empirical equations are proposed to estimate the axial strength and ultimate strain capacity of STCC stub columns with active and passive confinement.

References

  1. ACI Committee 211.1-91 (2008), Standard practice for selecting proportions for normal, heavyweight, and mass concrete; ACI manual of concrete practice, Part 1, American Concrete Institute MI, USA, 38.
  2. Andrawes, B., Shin, M. and Wierschem, N. (2010), "Active confinement of reinforced concrete bridge columns using shape memory alloys", J. Bridge Eng., 15(1), 81-89. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000038
  3. ASTM A370 (2003), Standard test methods and definitions for mechanical testing of steel products; Annual Book of ASTM Standard 01.
  4. Binici, B. (2005), "An analytical model for stress-strain behavior of confined concrete", Eng. Struct., 27(7), 1040-1051. https://doi.org/10.1016/j.engstruct.2005.03.002
  5. Chang, X., Huang, C.K. and Chen, Y.J. (2009), "Mechanical performance of eccentrically loaded pre-stressing concrete filled circular steel tube columns by means of expansive cement", Eng. Struct., 31(11), 2588-2597. https://doi.org/10.1016/j.engstruct.2009.06.007
  6. Dong, C.X., Kwan, A.K.H. and Ho, J.C.M. (2015), "A constitutive model for predicting the lateral strain of confined concrete", Eng. Struct., 91, 155-166. https://doi.org/10.1016/j.engstruct.2015.02.014
  7. Fam, A., Qie, F. and Rizkalla, S. (2004), "Concrete-filled steel tubes subjected to axial compression and lateral cyclic loads", J. Struct. Eng., 4(130), 631-640.
  8. Fu, Z., Ji, B., Lv, L. and Yang, M. (2011), "The mechanical properties of lightweight aggregate concrete confined by steel tube", Geotech. Sp. Publication ASCE, 219, 33-39.
  9. Han, L.H., Yao, G.H., Chen, Z.B. and Yu, Q. (2005), "Experimental behaviour of steel tube confined concrete (STCC) columns", Steel Compos. Struct., Int. J., 5(6), 459-484. https://doi.org/10.12989/scs.2005.5.6.459
  10. Han, L.H., Liu, W. and Yang, Y.F. (2008), "Behavior of thin walled steel tube confined concrete stub columns subjected to axial local compression", Thin-Wall. Struct., 46(2), 155-164. https://doi.org/10.1016/j.tws.2007.08.029
  11. Helal, Y., Garcia, R., Pilakoutas, K., Guadagnini, M. and Hajirasouliha, I. (2016), "Strengthening of short splices in RC beams using Post-Tensioned Metal Straps", Mater. Struct., 49(1-2), 133-147. https://doi.org/10.1617/s11527-014-0481-6
  12. Hosford, W. (2010), Solid Mechanics, University of Michigan, Emeritus, Cambridge University Press, 262 p.
  13. Huang, Y., Xiao, J. and Zhang, C. (2012), "Theoretical study on mechanical behavior of steel confined recycled aggregate concrete", J. Constr. Steel Res., 76, 100-111. https://doi.org/10.1016/j.jcsr.2012.03.020
  14. Janke, L., Czaderski, C., Ruth, J. and Motavalli, M. (2009), "Experiments on the residual load-bearing capacity of prestressed confined concrete columns", Eng. Struct., 31(10), 2247-2256. https://doi.org/10.1016/j.engstruct.2009.04.006
  15. Krstulovic-Opara, N. and Thiedeman, P.D. (2000), "Active confinement of concrete members with self-stressing composites", ACI Mater. J., 97(3), 297-308.
  16. Lahlou, K., Lachemi, M. and Aitcin, P.C. (1999), "Behavior of HSC filled tube columns under dynamic compressive loading", ASCE J. Struct. Eng., 125(10), 1100-1108. https://doi.org/10.1061/(ASCE)0733-9445(1999)125:10(1100)
  17. Mander, B.J., Priestley, J.N.M. and Park, R. (1988), "Theoretical stress-strain model for confined concrete", ASCE J. Struct. Eng. 144(8), 1804-1826.
  18. Moghaddam, H., Samadi, M., Pilakoutas, K. and Mohebbi, S. (2010), "Axial compressive behavior of concrete actively confined by metal strips; Part A: Experimental study", Mater. Struct., 43(10), 1369-1381. https://doi.org/10.1617/s11527-010-9588-6
  19. Mortazavi, A.A., Pilakoutas, K. and Son, K.S. (2003), "RC column strengthening by lateral pre-tensioning of FRP", J. Constr. Build. Mater., 6-7(17), 363-518.
  20. Nemati, S.T. (2006), Effect of Active Confinement on Concrete Behavior, Dissertation for Master's Degree; Mazandaran University, Iran.
  21. Nematzadeh, M. (2012), Determining the Relationships of Active Confinement of Fresh Concrete by Prestressing Steel Tubes, Dissertation for Doctoral Degree; Mazandaran University, Iran.
  22. Nematzadeh, M. and Naghipour, M. (2012), "Compressive strength and modulus of elasticity of freshly compressed concrete", Constr. Build. Mater., 34, 476-485. https://doi.org/10.1016/j.conbuildmat.2012.02.055
  23. Nematzadeh, M., Fazli, S. and Hajirasouliha, I. (2017), "Experimental study and calculation of laterally-prestressed confined concrete columns", Steel Compos. Struct., Int. J., 23(5), 517-527. https://doi.org/10.12989/scs.2017.23.5.517
  24. O'Shea, M.D. and Bridge, R.Q. (1998), "Tests on circular thinwalled steel tubes filled with medium and high strength concrete", Australian Civil Eng. Trans., 40, 15-27.
  25. Qi, H., Guo, L., Liu, J., Gan, D. and Zhang, S. (2011), "Axial load behavior and strength of tubed steel reinforced-concrete (SRC) stub columns", Thin-Wall. Struct., 49(9), 1141-1150. https://doi.org/10.1016/j.tws.2011.04.006
  26. Richart, F.E., Brandtzaeg, A. and Brown, R.L. (1928), "A study of the failure of concrete under combined compressive stresses", Bulletin 185; University of Illinois Engineering Experimental Station, Champaign, IL, USA.
  27. Shin, M. and Andrawes, B. (2014), "Parametric study of RC bridge columns actively confined with shape memory alloy spirals under lateral cyclic loading", J. Bridge Eng., 19(10).
  28. Shinohara, Y. (2008), "Effect of transverse prestressing on shear behaviors of high-strength concrete columns", Proceedings of the 14th World Conference on Earthquake Engineering (14WCEE), Beijing, China, October.
  29. Vincent, T. and Ozbakkaloglu, T. (2015), "Compressive behavior of prestressed high-strength concrete-filled aramid FRP tube columns: Experimental observations", J. Compos. Constr., 19(6), 1-13.
  30. Xiao, Y., He, W.H. and Choi, K.K. (2005), "Confined concrete-filled tubular columns", J. Struct. Eng. ASCE, 131(3), 488-497. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:3(488)
  31. 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