Steel and Composite Structures

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Restoring force model for circular RC columns strengthened by pre-stressed CFRP strips

  • Zhou, Changdong (School of Civil Engineering, Beijing Jiaotong University) ;
  • Lu, Xilin (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Li, Hui (School of Civil Engineering, Beijing Jiaotong University) ;
  • Tian, Teng (School of Civil Engineering, Beijing Jiaotong University)
  • Received : 2013.01.06
  • Accepted : 2014.03.12
  • Published : 2014.10.25
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Abstract

This paper presents a tri-linear restoring force model based on the test results of 12 circular RC columns strengthened by CFRP strips under low cyclic loading. The pre-stress of CFRP strips and axial load ratio of specimens are considered as the affect parameters of the proposed model. All essential characteristics of the hysteretic behavior of the proposed model, including the hysteretic rules, main performance points, strength degradation, stiffness degradation and confinement effects are explicitly analyzed. The calculated results from the proposed model are in good agreement with the experimental results, which shows that the recommended model can be reliably used for seismic behavior predictions of circular RC columns strengthened by pre-stressed CFRP strips.

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References

  1. ACI (2008), "Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures", ACI 440.2R-08, American Concrete Institute, Farmington Hills, MI, USA.
  2. Bai, X.B. (2011), "Study on the performance of circular concrete columns confined with lateral pre-tensioned FRP under axial load", Beijing Jiaotong University, Beijing, China. [In Chinese]
  3. Binici, B. (2008), "Design of FRPs in circular bridge column retrofits for ductility enhancement", Eng. Struct., 30(3), 766-776. https://doi.org/10.1016/j.engstruct.2007.05.012
  4. Burt, K. and Aftab, A. (1999), "Investigation of the behavior of circular concrete columns reinforced with carbon fiber reinforced polymer (CFRP) jackets", Can. J. Civil Eng., 26(5), 590-596 https://doi.org/10.1139/l99-022
  5. CEB-FIP (CEB-FIP model code) (1990), Comite Euro-International Du Beton, Thomas Telford, London, UK.
  6. FIB (2001), "Externally bonded FRP reinforcement for RC structures", Proceedings of the 14th International Federation for Structural Concrete, Technical report, Bulletin No. 14.
  7. Gu, D.S., Wu, G. and Wu, Z.S. (2010), "Ultimate flexural strength of normal section of FRP-confined RC circular columns", J. Southeast Univ. (English Edition), 26(1), 107-111.
  8. Ibarra, L.F., Medina, R.A. and Krawinkler, H. (2005), "Hysteretic models that incorporate strength and stiffness deterioration", Earthq. Eng. Struct. Dyn., 34(12), 1489-1511. https://doi.org/10.1002/eqe.495
  9. ISIS (2001), "Strengthening reinforced concrete structures with externally bonded fiber reinforced polymers", The Canadian Network of Centers of Excellence on Intelligent Sensing for Innovative Structures, Canada.
  10. JSCE (2001), "Recommendations for upgrading of concrete structures with use of continuous fiber sheets", Concrete engineering, Series 41, Japanese Society of Civil Engineers, Tokyo, Japan.
  11. National Standard of the People's Republic of China (2002), "GB/T 50081-2002: Standard for test method of mechanical properties on ordinary concrete", China Building Industry Press, Beijing, China.
  12. Nesheli, K.N. and Meguro, K. (2006), "Seismic retrofitting of earthquake-damaged concrete columns by lateral pre-tensioning of FRP belts", Proceedings of the 8th U.S. National Conference on Earthquake Engineering, San Francisco, CA, USA, April.
  13. Saatcioglu, M. (1991), "Modeling hysteretic force-deformation relationships for reinforced concrete elements", Special Publication, 127(5), 153-198.
  14. Saiidi, M. and Sozen, M.A. (1979), "Simple and complex models for nonlinear seismic response of reinforced concrete structures", Ph.D. Thesis, Structural Research Series 465, Civil Engineering Studies, University of Illinois Engineering Experiment Station, College of Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
  15. Sheikh, S. (2001), "Use of FRP composites for seismic upgrade of concrete columns", Proceedings of the International Conference on FRP Composites in Civil Engineering, Hong Kong, December.
  16. Sheikh, S.A. (2002), "Performance of concrete structures retrofitted with fibre reinforced polymers", Eng. Struct., 24(7), 869-879. https://doi.org/10.1016/S0141-0296(02)00025-1
  17. Sivaselvan, M.V. and Reinhorn, A.M. (2000), "Hysteretic models for deteriorating inelastic structures", J. Eng. Mech., 126(6), 633-640. https://doi.org/10.1061/(ASCE)0733-9399(2000)126:6(633)
  18. Stojadinovic, B. and Thewalt, C. (1996), "Energy balanced hysteresis models", Proceedings of the 11th World Conference on Earthquake Engineering, Acapulco, Mexico, June.
  19. Stone, W.C. and Taylor, A.W. (1992), "A predictive model for hysteretic failure parameters", Proceedings of the 10th World Conference on Earthquake Engineering, Madrid, Spain, July.
  20. Su, X.Z. (1998), "Study on seismic resistance of the prestressed concrete frame structure", Shanghai Science and Technology Press, 118-119, Shanghai, China. [In Chinese]
  21. Taleie, S.M. and Moghaddam, H. (2007), "Experimental and analytical investigation of square RC columns retrofitted with pre-stressed FRP strips", Proceedings of the 8th International Symposium on FRP Reinforcement for Concrete Structures, Patras, Greece.
  22. Taleie, S.M. and Oskouei, A.V. (2007), "Experimental investigation of FRP relaxation and its effect on pre-stressing techniques", Proceedings of the 8th International Symposium on FRP Reinforcement for Concrete Structures, Patras, Greece.
  23. Tamai, S., Sato, T. and Okamoto, M. (2000), "Hysteresis model of steel jacketed RC columns for railway viaducts", IABSE Congress Report.
  24. Tao, Z., Gao, X. and Yu, Q. (2005), "Theoretical analysis of hysteretic behavior of FRP-confined RC columns", Indust. Construct., 35(9), 15-19. [In Chinese]
  25. Teng, J.G., Chen, J., Smith, S. and Lam, L. (2002), FRP: Strengthened RC Structures, John Wiley & Sons.
  26. Xiao, Y. and Ma, R. (1997), "Seismic retrofit of RC circular columns using prefabricated composite jacketing", J. Struct. Eng., 123(10), 1357-1364. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:10(1357)
  27. Yamakawa, T., Nesheli, K.N. and Satoh, H. (2001), "Seismic or emergency retrofit of RC short columns by use of prestressed aramid fiber belts as external hoops", J. Struct. Construct. Eng., 550, 135-141.

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