Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Uni-axial behaviour of normal-strength CFDST columns with external steel rings

  • Dong, C.X. (Department of Civil Engineering, The University of Hong Kong) ;
  • Ho, J.C.M. (Department of Civil Engineering, The University of Hong Kong)
  • Received : 2012.04.02
  • Accepted : 2012.11.05
  • Published : 2012.12.25
⟨ Previous Next ⟩

Abstract

Concrete-filled-steel-tubular (CFST) columns have been well proven to improve effectively the strength, stiffness and ductility of concrete members. However, the central part of concrete in CFST columns is not fully utilised under uni-axial compression, bending and torsion. It has small contribution to both flexural and torsion strength, while it can be replaced effectively by steel with smaller area to give similar load-carrying capacity. Also, the confining pressure in CFST columns builds up slowly because the initial elastic dilation of concrete is small before micro-crackings of concrete are developed. From these observations, it is convinced that the central concrete can be effectively replaced by another hollow steel tube with smaller area to form double-skinned concrete-filled-steel-tubular (CFDST) columns. In this study, a series of uni-axial compression tests were carried out on CFDST and CFST columns with and without external steel rings. From the test results, it was observed that on average that the stiffness and elastic strength of CFDST columns are about 25.8% and 33.4% respectively larger than CFST columns with similar equivalent area. The averaged axial load-carrying capacity of CFDST columns is 7.8% higher than CFST columns. Lastly, a theoretical model that takes into account the confining effects of steel tube and external rings for predicting the uni-axial load-carrying capacity of CFDST columns is developed.

Keywords

Acknowledgement

Supported by : The University of Hong Kong

References

  1. Bechtoula, H., Kono, S. and Watanabe, F. (2009), "Seismic performance of high strength reinforced concrete columns", Structural Engineering and Mechanics, 31(6), 697-716. https://doi.org/10.12989/sem.2009.31.6.697
  2. Bindhu, K.R., Jaya, K.P. and Manicka Selvam, V.K. (2008), "Seismic resistance of exterior beam-column joints with non-conventional confinement reinforcement detailing", Structural Engineering and Mechanics, 30(6), 733-761. https://doi.org/10.12989/sem.2008.30.6.733
  3. Cai, J. and He, Z.Q. (2006), "Axial load behavior of square CFT stub column with binding bars", Journal of Constructional Steel Research, 62(5), 472-483. https://doi.org/10.1016/j.jcsr.2005.09.010
  4. Choi, S.M., Jung, D.S., Kim, D.J. and Kim, J.H. (2007), "An evaluation equation of load capacities for CFT square column-to-beam connections with combined diaphragm", Steel and Composite Structures, 7(4), 303-320. https://doi.org/10.12989/scs.2007.7.4.303
  5. Cusson, D. and Paultre, P. (1994), "High-strength concrete columns confined by rectangular ties", Journal of Structural Engineering, ASCE, 120(3), 783-804. https://doi.org/10.1061/(ASCE)0733-9445(1994)120:3(783)
  6. Dai, X. and Lam, D. (2010), "Axial compressive behaviour of stub concrete-filled columns with elliptical stainless steel hollow sections", Steel and Composite Structures, 10(6), 517-539. https://doi.org/10.12989/scs.2010.10.6.517
  7. EC4, Eurocode 4 (2004), Eurocode 4: Design of composite steel and concrete structures: Part 1-1: General rules and rules for buildings, UK.
  8. Elchalakani, M., Zhao, X.L. and Grzebieta, R. (2002), "Tests on concrete filled double-skin (CHS outer and SHS inner) composite short columns under axial compression", Thin-walled Structures, 40(5), 415-441. https://doi.org/10.1016/S0263-8231(02)00009-5
  9. Fang, Y.F. and Zhu, L.T. (2009), "Recycled aggregate concrete filled steel SHS beam-columns subjected to cyclic loading", Steel and Composite Structures, 9(1), 19-38. https://doi.org/10.12989/scs.2009.9.1.019
  10. Ferretti, E. (2004), "On Poisson ratio and volumetric strain in concrete", International Journal of Fracture, 126, 49-55. https://doi.org/10.1023/B:FRAC.0000026587.43467.e6
  11. Han, L.H., Tao, Z., Huang, H. and Zhao, X.L. (2004), "Concrete-filled double skin (SHS outer and CHS inner) steel tubular beam-columns", Thin-walled structures, 42(9), 1329-1355. https://doi.org/10.1016/j.tws.2004.03.017
  12. Han, L.H., Huang, H. and Zhao, X.L. (2009), "Analytical behaviour of concrete-filled double skin steel tubular (CFDST) beam-columns under cyclic loading", Thin-walled structures, 47(6-7), 668-680. https://doi.org/10.1016/j.tws.2008.11.008
  13. Ho, J.C.M., Lam, J.Y.K. and Kwan, A.K.H. (2010), "Effectiveness of adding confinement for ductility improvement of high-strength concrete columns", Engineering Structures, 32(3), 714-725, https://doi.org/10.1016/j.engstruct.2009.11.017
  14. Ho, J.C.M., Lam, J.Y.K. and Kwan, A.K.H. (2012), "Flexural ductility and deformability of concrete beams incorporating high-performance materials", The Structural Design of Tall and Special Buildings, 21(2), 114-132. https://doi.org/10.1002/tal.579
  15. Ho, J.C.M. (2011), "Inelastic design of high-axially loaded concrete columns in moderate seismicity regions", Structural Engineering and Mechanics, 39(4), 559-578. https://doi.org/10.12989/sem.2011.39.4.559
  16. Hsu, H.L., Juang, J.L. and Luo, K.T. (2009), "Experimental evaluation on the seismic performance of high strength thin-walled composite members accounting for sectional aspect ratio effect", Steel and Composite Structures, 9(4), 367-380. https://doi.org/10.12989/scs.2009.9.4.367
  17. Hu, H.T., Su, F.C. and Elchalakani, M. (2010), "Finite element analysis of CFT columns subjected to pure bending moment", Steel and Composite Structures, 10(5), 415-428. https://doi.org/10.12989/scs.2010.10.5.415
  18. Huang, Y., Long, Y. and Cai, J. (2008), "Ultimate strength of rectangular concrete-filled steel tubular (CFT) stub columns under axial compression", Steel and Composite Structures, 8(2), 115-128. https://doi.org/10.12989/scs.2008.8.2.115
  19. Lam, J.Y.K., Ho, J.C.M. and Kwan, A.K.H. (2009a), "Flexural ductility of high-strength concrete columns with minimal confinement", Materials and Structures, 42(7), 909-921. https://doi.org/10.1617/s11527-008-9431-5
  20. Lam, J.Y.K., Ho, J.C.M. and Kwan, A.K.H. (2009b), "Maximum axial load level and minimum confinement for limited ductility design of concrete columns", Computers and Concrete, 6(5), 357-376. https://doi.org/10.12989/cac.2009.6.5.357
  21. Lee, S.J. (2007), "Capacity and the moment-curvature relationship of high-strength concrete filled steel tube columns under eccentric loads", Steel and Composite Structures, 7(2), 135-160. https://doi.org/10.12989/scs.2007.7.2.135
  22. Liew, J.Y.R. and Sohel, K.M.A. (2009), "Lightweight steel-concrete-steel sandwich system with J-hook connectors", Engineering Structures, 31(5), 1166-1178. https://doi.org/10.1016/j.engstruct.2009.01.013
  23. Liew, J.Y.R., Sohel, K.M.A. and Koh, C.G. (2009), "Impact tests on steel-concrete-steel sandwich beams with lightweight concrete core", Engineering Structures, 31(9), 2045-2059. https://doi.org/10.1016/j.engstruct.2009.03.007
  24. Liew, J.Y.R. and Sohel, K.M.A. (2010), "Structural Performance of steel-concrete-steel sandwich composite structures", Advances in Structural Engineering, 13(3), 453-470. https://doi.org/10.1260/1369-4332.13.3.453
  25. Lu, X. and Hsu, C.T.T. (2007), "Tangent Poisson's ratio of high-strength concrete in triaxial compression", Magazine of Concrete Research, 59(1), 69-77. https://doi.org/10.1680/macr.2007.59.1.69
  26. Lu, X. and Zhou, Y. (2007), "An applied model for steel reinforced concrete columns", Structural Engineering and Mechanics, 27(6), 697-711. https://doi.org/10.12989/sem.2007.27.6.697
  27. Mander, J.B., Priestley, M.J.N. and Park, R. (1988), "Theoretical stress-strain model for confined concrete", Journal of Structural Engineering, ASCE, 114(8), 1804-1825. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:8(1804)
  28. Pam, H.J. and Ho, J.C.M. (2001), "Flexural strength enhancement of confined reinforced concrete columns", Proceedings, Institution of Civil Engineers, Structures and Buildings, 146(4), 363-370. https://doi.org/10.1680/stbu.2001.146.4.363
  29. Pam, H.J. and Ho, J.C.M. (2009), "Length of critical region for confinement steel in limited ductility high-strength reinforced concrete columns", Engineering Structures, 31(12), 2896-2908. https://doi.org/10.1016/j.engstruct.2009.07.015
  30. Park, J.W., Hong, Y.K. and Choi, S.M. (2010), "Behaviors of concrete filled square steel tubes confined b carbon fiber sheets (CFS) under compression and cyclic loads", Steel and Composite Structures, 10(2), 187-205. https://doi.org/10.12989/scs.2010.10.2.187
  31. Persson, B. (1999), "Poisson's ratio of high-performance concrete", Cement and Concrete Research, 29(10), 1647-1653. https://doi.org/10.1016/S0008-8846(99)00159-3
  32. Sohel, K.M.A. and Liew, J.Y.R. (2011), "Steel-concrete-steel sandwich slabs with lightweight core - static performance", Engineering Structures, 33(3), 981-992. https://doi.org/10.1016/j.engstruct.2010.12.019
  33. Sadjadi, R. and Kianoush, M.R. (2010), "Application of fiber element in the assessment of the cyclic loading behavior of RC columns", Structural Engineering and Mechanics, 34(3), 301-317. https://doi.org/10.12989/sem.2010.34.3.301
  34. Tao, Z., Han, L.H. and Zhao, X.L. (2004), "Behaviour of concrete-filled double skin (CHS inner and CHS outer) steel tubular stub columns and beam-columns", Journal of Constructional Steel Research, 60(8), 1129-1158. https://doi.org/10.1016/j.jcsr.2003.11.008
  35. Tao, Z., Han, L.H. and Wang, D.Y. (2007), "Experimental behaviour of concrete-filled stiffened thin-walled steel tubular columns', Thin-walled structures, 45(5), 517-527. https://doi.org/10.1016/j.tws.2007.04.003
  36. Uenaka, K., Kitoh, H. and Sonoda, K. (2010), "Concrete filled double skin circular stub columns under compression", Thin-Walled Structures, 48(1), 19-24. https://doi.org/10.1016/j.tws.2009.08.001
  37. Wei, S., Mau, S.T., Vipulanandan, C. and Mantrala, S.K. (1995a), "Performance of new sandwich tube under axial loading: experiment", Journal of Structural Engineering, 121(12), 1806-1814. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:12(1806)
  38. Wei, S., Mau, S.T., Vipulanandan, C. and Mantrala, S.K. (1995b), "Performance of new sandwich tube under axial loading: analysis", Journal of Structural Engineering, 121(12), 1815-1821. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:12(1815)
  39. Yan, Z.H. and Au, F.T.K. (2010) "Nonlinear dynamic analysis of frames with plastic hinges at arbitrary locations", The Structural Design of Tall and Special Buildings, 19(7), 778-801.
  40. Yang, Y. and Han, L.H. (2008), "Concrete-filled double-skin tubular columns under fire", Magazine of Concrete Research, 60(3), 211-222. https://doi.org/10.1680/macr.2007.00074
  41. Young, B. and Ellobody, E. (2006), "Experimental investigation of concrete-filled cold formed high-strength stainless steel tube columns", Journal of Constructional Steel Research, 62(5), 484-492. https://doi.org/10.1016/j.jcsr.2005.08.004
  42. Zhang, G., Liu, B., Bai, G. and Liu, J. (2009), "Experimental study on seismic behavior of high strength reinforced concrete frame columns with high axial compression ratios", Structural Engineering and Mechanics, 33(5), 653-656. https://doi.org/10.12989/sem.2009.33.5.653
  43. Zhao, X.L. and Grzebieta, R. (2002), "Strength and ductility of concrete filled double skin (SHS inner and SHS outer) tubes", Thin-walled structures, 40(2), 199-213. https://doi.org/10.1016/S0263-8231(01)00060-X
  44. Zhao, X.L., Tong, L.W., and Wang, X.Y. (2010). CFDST stub columns subjected to large deformation axial loading. Engineering Structures, 32(3), 692-703. https://doi.org/10.1016/j.engstruct.2009.11.015
  45. Zhou, X.M., Wu, Y.F. and Leung, A.Y.T. (2012), "Analyses of plastic hinge regions in reinforced concrete beams under monotonic loading", Engineering Structures, 34, 466-482. https://doi.org/10.1016/j.engstruct.2011.10.016
  46. Zhou, K.J.H., Ho, J.C.M. and Su, R.K.L. (2010), "Normalised rotation capacity for deformability evaluation of high-performance concrete beams", Earthquakes and Structures, 1(3), 269-287. https://doi.org/10.12989/eas.2010.1.3.269

Cited by

  1. Numerical Modeling of Concrete-Filled Double-Skin Steel Square Tubular Columns under Blast Loading vol.29, pp.5, 2015, https://doi.org/10.1061/(ASCE)CF.1943-5509.0000749
  2. Flexural behavior of FRP-HSC-steel double skin tubular beams under reversed-cyclic loading vol.87, 2015, https://doi.org/10.1016/j.tws.2014.11.003
  3. Experiments on the bearing capacity of tapered concrete filled double skin steel tubular (CFDST) stub columns vol.17, pp.5, 2014, https://doi.org/10.12989/scs.2014.17.5.667
  4. A constitutive model for predicting the lateral strain of confined concrete vol.91, 2015, https://doi.org/10.1016/j.engstruct.2015.02.014
  5. Theoretical model for double-skinned concrete-filled-steel-tubular columns with external confinement vol.21, pp.5, 2015, https://doi.org/10.3846/13923730.2014.893913
  6. Effect of seawater intake methods on the performance of seawater source heat pump systems in cold climate areas vol.153, 2017, https://doi.org/10.1016/j.enbuild.2017.08.016
  7. Improving interface bonding of double-skinned CFST columns vol.65, pp.20, 2013, https://doi.org/10.1680/macr.13.00041
  8. Behavior of Hollow-Core Steel-Concrete-Steel Columns Subjected to Torsion Loading vol.21, pp.10, 2016, https://doi.org/10.1061/(ASCE)BE.1943-5592.0000923
  9. Ultimate Axial Strength of Concrete-Filled Double Skin Steel Tubular Column Sections vol.2019, pp.1687-8094, 2019, https://doi.org/10.1155/2019/6493037
  10. Seismic behavior of stiffened concrete-filled double-skin tubular columns vol.27, pp.5, 2012, https://doi.org/10.12989/scs.2018.27.5.577
  11. Experimental investigation and analytical modelling of blind bolted flush or extended end plate connections to circular CFDST columns vol.192, pp.None, 2012, https://doi.org/10.1016/j.engstruct.2019.04.053
  12. Component based moment-rotation model of composite beam blind bolted to CFDST column joint vol.38, pp.5, 2021, https://doi.org/10.12989/scs.2021.38.5.547