Computers and Concrete

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Evaluation of interfacial shear stress in active steel tube-confined concrete columns

  • Nematzadeh, Mahdi (Department of Civil Engineering, University of Mazandaran) ;
  • Ghadami, Jaber (Department of Civil Engineering, University of Mazandaran)
  • Received : 2017.02.17
  • Accepted : 2017.04.27
  • Published : 2017.10.25
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Abstract

This paper aims to analytically investigate the effect of shear stress at the concrete-steel interface on the mechanical behavior of the circular steel tube-confined concrete (STCC) stub columns with active and passive confinement subjected to axial compression. Nonlinear 3D finite element models divided into the four groups, i.e. circumferential-grooved, talc-coated, lubricated, and normal groups, with active and passive confinement were developed. An innovative method was used to simulate the actively-confined specimens, and then, the results of the finite element models were compared with those of the experiments previously conducted by the authors. It was revealed that both the predicted peak compressive strength and stress-strain curves have good agreement with the corresponding values measured for the confined columns. Then, the mechanical properties of the active and passive specimens such as the concrete-steel interaction, longitudinal and hoop stresses of the steel tube, confining pressure applied to the concrete core, and compressive stress-strain curves were analyzed. Furthermore, a parametric study was performed to explore the effects of the concrete compressive strength, steel tube diameter-to-wall thickness ratio, and prestressing level on the compressive behavior of the STCC columns. The results indicate that reducing or removing the interfacial shear stress in the active and passive specimens leads to an increase in the hoop stress and confining pressure, while the longitudinal stress along the steel tube height experiences a decrease. Moreover, prestressing via the presented method is capable of improving the compressive behavior of STCC columns.

Keywords

References

  1. ACI 318M (2008), Building Code Requirements for Structural Concrete and Commentary, American Concrete Institute, U.S.A.
  2. Chen, Q. and Andrawes, B. (2012), "3D finite element modeling to study the behavior of shape memory alloy confined concrete", Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal, September.
  3. Ghadami, J. and Nematzadeh, M. (2016), "Effect of bond shear stress on compressive behaviour of steel tube-confined concrete with active and passive confinement", Eur. J. Environ. Civil Eng.
  4. Gupta, P.K., Verma, V.K., Khaudhair, Z.A. and Singh, H. (2015), "Effect of tube area on the behavior of concrete filled tubular columns", Comput. Concrete, 15(2), 141-166. https://doi.org/10.12989/cac.2015.15.2.141
  5. Haghinejad, A. and Nematzadeh, M. (2016), "Three-dimensional finite element analysis of compressive behavior of circular steel tube-confined concrete stub columns by new confinement relationships", Lat. Am. J. Sol. Struct., 13, 916-944. https://doi.org/10.1590/1679-78252631
  6. Hibbitt, Karlson & Sorensen Inc (2003), ABAQUS/Standard User's Manual, Version 6.12 Pawtucket, RI, U.S.A.
  7. Hu, H.T. and Schnobrich, W.C. (1989), "Constitutive modeling of concrete by using non-associated plasticity", J. Mater. Civil Eng., 1(4), 199-216. https://doi.org/10.1061/(ASCE)0899-1561(1989)1:4(199)
  8. Hu, H.T., Huang, C.S., Wu, M.H. and Wu, Y.M. (2003), "Nonlinear analysis of axially loaded concrete-filled tube columns with confinement effect", J. Struct. Eng., 129(10), 1322-1329. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:10(1322)
  9. Johansson, M. and Gylltoft, K. (2002), "Mechanical behaviour 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)
  10. Mander, J.B., Priestley, M.J.N. and Park, R. (1988), "Theoretical stress-strain model for confined concrete", J. Struct. Eng., 114(8), 1804-1826. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:8(1804)
  11. Moghaddam, H., Samadi, M. and Pilakoutas, K. (2010), "Compressive behavior of concrete actively confined by metal strips, part B: Analysis", Mater. Struct., 43, 1383-1396. https://doi.org/10.1617/s11527-010-9589-5
  12. Nemati, S.T. (2006), "Effect of active confinement on concrete behavior", M.S. Dissertation, University of Mazandaran.
  13. Nematzadeh, M. and Haghinejad, A. (2017), "Analysis of actively-confined concrete columns using prestressed steel tubes", Comput. Concrete, 19(5), 477-488. https://doi.org/10.12989/cac.2017.19.5.477
  14. 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
  15. Nematzadeh, M., Naghipour, M., Jalali, J. and Salari, A. (2017), "Experimental study and calculation of confinement relationships for prestressed steel tube-confined compressed concrete stub columns", J. Civil Eng. Manage., 23(6), 699-711. https://doi.org/10.3846/13923730.2017.1281837
  16. Qi, H.T., Guo, L.H., Liu, J.P., Gan. D. and Zhang, S.M. (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
  17. Richart, F.E., Brandzaeg, A. and Brown, R.L. (1928), A Study of the Failure of Concrete under Combined Compressive Stresses, University of Illinois Engineering Experimental Station, Champaign, Illinois, U.S.A.
  18. Saenz, LP. (1964), "Discussion of 'equation for the stress-strain curve of concrete' by P. Desayi and S. Krishnan", ACI J., 61, 1229-1235.
  19. Schneider, S.P. (1998), "Axially loaded concrete-filled steel tubes", J. Struct. Eng., 124(10), 1125-1138. https://doi.org/10.1061/(ASCE)0733-9445(1998)124:10(1125)
  20. Shraideh, M.S. and Aboutaha, R.S. (2013), "Analysis of steel-GFRP reinforced concrete circular columns", Comput. Concrete, 11(4), 351-364. https://doi.org/10.12989/cac.2013.11.4.351
  21. Tao, Z., Wang, Z.B. and Yu, Q. (2013), "Finite element modelling of concrete-filled steel stub columns under axial compression", J. Constr. Steel Res., 89, 121-131. https://doi.org/10.1016/j.jcsr.2013.07.001
  22. 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, 53-64. https://doi.org/10.1016/j.jcsr.2009.08.003

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