Steel and Composite Structures

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Behaviors of concrete filled square steel tubes confined by carbon fiber sheets (CFS) under compression and cyclic loads

  • Park, Jai Woo (University of Seoul, Department of Architecture Engineering) ;
  • Hong, Young Kyun (Hongik University, Department of Architecture) ;
  • Choi, Sung Mo (University of Seoul, Department of Architecture Engineering)
  • Received : 2009.09.03
  • Accepted : 2010.03.18
  • Published : 2010.03.25
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Abstract

The existing CFT columns present the deterioration in confining effect after the yield of steel tube, local buckling and the deterioration in load capacity. If lateral load such as earthquake load is applied to CFT columns, strong shearing force and moment are generated at the lower part of the columns and local buckling appears at the column. In this study, axial compression test and beam-column test were conducted for existing CFT square column specimens and those reinforced with carbon fiber sheets (CFS). The variables for axial compression test were width-thickness ratio and the number of CFS layers and those for beamcolumn test were concrete strength and the number of CFS layers. The results of the compression test showed that local buckling was delayed and maximum load capacity improved slightly as the number of layers increased. The specimens' ductility capacity improved due to the additional confinement by carbon fiber sheets which delayed local buckling. In the beam-column test, maximum load capacity improved slightly as the number of CFS layers increased. However, ductility capacity improved greatly as the increased number of CFS layers delayed the local buckling at the lower part of the columns. It was observed that the CFT structure reinforced with carbon fiber sheets controlled the local buckling at columns and thus improved seismic performance. Consequently, it was deduced that the confinement of CFT columns by carbon fiber sheets suggested in this study would be widely used for reinforcing CFT columns.

Keywords

Acknowledgement

Grant : Development of highly-efficient production & disaster-prevention technology for skyscrapers

Supported by : KOSEF, Korea Research Foundation

References

  1. A. H. Varma., J. M. Ricles., R. S. Sause. and L. W. Lu., (2004) "Seismic Behavior and Design of High-Strength Square Concrete-Filled Steel Tube Beam Columns", J. Struct. Eng, -ASCE., 130(2), 169-179. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:2(169)
  2. AISC (2005), Steel Construction Manual 2, 13th ed., American Institute of Steel Constriction .
  3. American Concrete Institute (ACI)., (1996), State-of art report on fiber reinforced plastic(FRP) reinforcement for concrete structures, ACI 440R-96 Committee 440, Detroit.
  4. ANSI/ AISC 341-02., (2002), Seismic Provisions for Structural Steel Buildings, 40-41.
  5. C.S. Huang. and Y. K. Yeh., (2002), "Axial load behavior of stiffened concrete-filled steel columns", J. Struct. Eng. -ASCE, 128(9), 1222-1230. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:9(1222)
  6. Choi. S. M., Ji. K. H. and Kim. D. K., (2000), "Evaluation on Deformation Capacity of CFT Square Columns subjected to Constant Axial and Cyclic Lateral Loads", J. Kor. Society. Steel Construction, 12(2), 209-219.
  7. H. Ge. and T. Usami., (1992), "Strength of concrete-filled thin-walled steel ox columns: Experiment", J. Struct. Eng. -ASCE., 118(11), 3036-3054. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:11(3036)
  8. H. Saadatmanesh., M. R. Ehsani. and L. Jin., (1996) "Seismic Strengthening of Circular Bridge Pier Model with Fiber Composites", ACI Struct. J., 92(3), 639-647.
  9. J. Cai. and ZX. Q. He., (2006).,"Axial load behavior of square CFT stub column with binding bars.", J. Construct. Steel Res., 62, 472-483. https://doi.org/10.1016/j.jcsr.2005.09.010
  10. J.G. Teng., J.F. Chen., S.T. Smith. and L. Lam., (2001), FRP Strengthened RC Structures, 3-5.
  11. J. W. Park., (2008) "Load bearing capacity for concrete filled steel square tube confined by carbon fiber sheets.", Ph.D. thesis, Honeik University, Korea.
  12. K. Sakino. and M. Tommi., (1981),"Hysteretic behavior of concrete filled square steel tubular beam-columns failed in flexure", Transactions. Jap. Concrete Inst., 3, 439-446
  13. Kang. C. H., Oh. Y. S. and Moon. T. S., (2001), "Strength of Axially Loaded Concrete-Filled Tubular Stub Columns", J. Kor. Society. Steel. Construction, 12(2), 279-287.
  14. S. P .Schneider.,(1998) "Axially Loaded Concrete-Filled Steel Tubes", J. Struct. Eng. -ASCE., 121(10), 1125- 1138
  15. T. Fujimoto., A. Mukai., I. Nishiyama. and K. Sakino., (2004) "Behavior of Eccentrically Loaded Concrete- Filled Steel Tubular Columns", J. Struct. Eng., -ASCE., 130(2), 203-212. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:2(203)
  16. T. Fukumoto., (2005), "Steel-beam-to-concrete-filled-steel-tube-column Moment Connection in Japan", Steel Struct., 5, 357-365.
  17. T. I. Lin., C.M. Huang. and S. Y. Chen.,(1993), "Concrete-filled tubular steel columns subjected to eccentric axial load", J. Chin. Inst. Civil Hydraulic Eng., 5(4), 377-386.
  18. X.Y. Mao. and Y. Xiao (2006), "Seismic behavior of confined square CFT columns", Eng. Struct., 28(10), 1378- 1386 https://doi.org/10.1016/j.engstruct.2006.01.015
  19. Xiao., W. He., and K. K. Choi., (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)
  20. Y. Xiao. and H. Wu., (2002) "Retrofit of Reinforced Concrete Columns Using Partially Stiffened Steel Jackets", J. Struct. Eng. -ASCE., 129(6), 725-732.
  21. Y. Xiao. and W. He., (2000) "Compressive behavior of concrete confined by carbon fiber composite jackets", J. Mater. Civil Eng. -ASCE., 12(2), 139-146. https://doi.org/10.1061/(ASCE)0899-1561(2000)12:2(139)
  22. Y.S. Huang., Y. L. Long. and J. Cai., (2008), "Ultimate strength of rectangular concrete-filled steel tubular (CFT) stub columns under axial compression", Steel and Composite Struct., 8(2), 115-128. https://doi.org/10.12989/scs.2008.8.2.115
  23. Yun. Y. S., Kim. Y. S., Kim. J. H. and Choi. S. M., (2002), "Cyclic Testing for CFT Column-to-Bema Connections with New Diaphragm", Second Int. Symp. Steel Struct. 440-451.
  24. Z. Tao., L. H. Han. and D. Y. Wang., (2008), "Strength and ductility of stiffened thin-walled hollow steel structural sub columns filled with concrete", Thin-Wall. Struct., 46(10), 1113-1128. https://doi.org/10.1016/j.tws.2008.01.007
  25. Z. Tao., L. H. Han. and L. L. Wang., (2007), "Compressive and flexural behavior of CFRP-repaired concretefilled steel tubes after exposure to fire", J. Construct. Steel. Res., 63(8), 1116-1126. https://doi.org/10.1016/j.jcsr.2006.09.007

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