Computers and Concrete

  • 제15권1호
  • /
  • Pages.1-20
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  • 2015
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Seismic rehabilitation of substandard RC columns with partially deteriorated concrete using CFRP composites

  • Hou, Dongxu (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology) ;
  • Wu, Zhimin (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology) ;
  • Zheng, Jianjun (School of Civil Engineering and Architecture, Zhejiang University of Technology) ;
  • Cui, Yao (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology)
  • 투고 : 2013.11.04
  • 심사 : 2014.11.03
  • 발행 : 2015.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Many existing reinforced concrete (RC) columns in structures tend to become substandard RC ones due to updated standards or environmental changes. These substandard columns may alter the behaviors of the whole structure and therefore are in urgent need of seismic retrofitting. Owing to their superior advantages, carbon fiber reinforced polymer (CFRP) composites are widely used to retrofit RC columns. The applications mainly focus on various substandard RC columns, but few deals with substandard columns with deteriorated concrete, especially damaged by earthquake. The purpose of this paper is to investigate the seismic behaviors of CFRP reinforced partially deteriorated RC columns and to evaluate the effect of CFRP sheets on them. Six flexure-dominant columns were tested under a constant axial load and transverse cyclic displacements. It is found that the seismic behaviors of partially deteriorated columns can be recovered by wrapping CFRP sheets on them. Numerical analysis is then conducted using finite element methods and verified with experimental results. The effects of the axial load ratio, the ratio of the thickness of CFRP sheet to the column diameter, and the slenderness ratio on the seismic behaviors of CFRP reinforced RC columns are evaluated. Finally, a method is proposed to determine the required thickness of CFRP sheet.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation

참고문헌

  1. Akgun, D., Demir, C. and Ilki, A. (2010), "Axial behavior of FRP jacketed extended rectangular members constructed with low strength concrete", The 5th International Conference on FRP Composites in Civil Engineering, Beijing, China, September.
  2. Bailey, C. and Yaqub, M. (2012), "Seismic strengthening of shear critical post-heated circular concrete columns wrapped with FRP composite jackets", Compos. Struct., 94(3), 851-864. https://doi.org/10.1016/j.compstruct.2011.09.004
  3. Bao, X. and Li, B. (2010), "Residual strength of blast damaged reinforced concrete columns", Int. J. Impact Eng., 37(3), 295-308. https://doi.org/10.1016/j.ijimpeng.2009.04.003
  4. Belarbi, A. and Bae, S. (2007), "An experimental study on the effect of environmental exposures and corrosion on RC columns with FRP composite jackets", Compos. Part B-Eng., 38B(5-6), 674-684. https://doi.org/10.1016/j.compositesb.2006.09.004
  5. CEB-FIP (2010), CEB-FIP, CEB-FIP Model Code, Lausanne.
  6. EIGawady, M., Endeshaw, M., McLean, D. and Sack, R. (2010), "Retrofitting of rectangular columns with deficient lap splices", J. Compos. Constr., 14(1), 22-35. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000047
  7. Emmanuel, A. and Oladipo, F. (2012), "Investigation of salinity effect on compressive strength of reinforced concrete", J. Sustain. Dev., 5(6), 74-82.
  8. Frangou, M., Pilakoutas, K. and Dritsos, S. (1995), "Structural repair/strengthening of RC columns", Constru. Build. Mater., 9(5), 259-266. https://doi.org/10.1016/0950-0618(95)00013-6
  9. Fukuyama, K., Higashibata, Y. and Miyauchi, Y. (2000), "Studies on repair and strengthening methods of damaged reinforced concrete columns", Cement. Concrete. Comp., 22(1), 81-88.
  10. GB50010-2010 (2010), GB50010-2010, Code for design of concrete structures, Beijing.
  11. Goksu, C., Polat, A. and Ilki, A. (2012), "Attempt for seismic retrofit of existing substandard RC members under reversed cyclic flexural effects", J. Compos. Constr., 16(3), 286-299. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000256
  12. Hanjari, K. (2010), "Structural behaviour of deteriorated concrete structures", Ph.D. Dissertation, Chalmers University of Technology, Goteborgs.
  13. Harajli, M. (2008), "Seismic behavior of RC columns with bond-critical regions: criteria for bond strengthening using external FRP jackets", J. Compos. Constr., 12(1), 69-79. https://doi.org/10.1061/(ASCE)1090-0268(2008)12:1(69)
  14. Haroun, M. and Elsanadedy, H. (2005), "Fiber-reinforced plastic jackets for ductility enhancement of reinforced concrete bridge columns with poor lap-splice detailing", J. Bridge. Eng., 10(6), 749-757. https://doi.org/10.1061/(ASCE)1084-0702(2005)10:6(749)
  15. Iacobucci, R., Sheikh, S. and Bayrak, O. (2003), "Retrofit of square concrete columns with carbon fiberreinforced polymer for seismic resistance", ACI Struct. J., 100(6), 785-794.
  16. Kalyoncuoglu, A., Ghaffari, P., Goksu, C. and Ilki, A. (2013), "Rehabilitation of corrosion-damaged substandard RC columns using FRP sheets", Adv.Mat.Res., 639-640, 1096-1103. https://doi.org/10.4028/www.scientific.net/AMR.639-640.1096
  17. Kent, D. and Park, R. (1971), "Flexural members with confined concrete", J. Struct. Div., 97(7), 1969-1990.
  18. Lam, L., and Teng, J. (2003), "Design-oriented stress-strain model for FRP-confined concrete", Constr. Build. Mater., 17(6), 471-489. https://doi.org/10.1016/S0950-0618(03)00045-X
  19. Li, B. and Lim, C. (2010), "Tests on seismically damaged reinforced concrete structural walls repaired using fiber-reinforced polymers", J. Compos. Constr., 14(5), 597-608. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000110
  20. Li, G., Hedlund, S., Pang, S., Alaywan, W., Eggers, J. and Abadie, C. (2003), "Repair of damaged RC columns using fast curing FRP composites", Compos. Part B-Eng., 34B(3), 261-271.
  21. Li, J., Gong, J. and Wang, L. (2009), "Seismic behavior of corrosion-damaged reinforced concrete columns strengthened using combined carbon fiber-reinforced polymer and steel jacket", Constr. Build. Mater., 23(7), 2653-2663. https://doi.org/10.1016/j.conbuildmat.2009.01.003
  22. Manuel, A. and Silva (2011), "Behavior of square and circular columns strengthened with aramidic or carbon fibers", Constr. Build. Mater., 25(8), 3222-3228. https://doi.org/10.1016/j.conbuildmat.2011.03.007
  23. Mazzoni, S., Mckenna, F. and Scott, H. (2009), Open System For Earthquake Engineering Simulation User Command-language Manual, Pacific earthquake engineering research center, Berkeley, California, USA.
  24. Ozcan, O., Binici, B. and Ozcebe, G. (2008), "Improving seismic performance of deficient reinforced concrete columns using carbon fiber-reinforced polymers", Eng. Struct., 30(6), 1632-1646. https://doi.org/10.1016/j.engstruct.2007.10.013
  25. Ozcan, O., Binici, B. and Ozcebe, G. (2010), "Seismic strengthening of rectangular reinforced concrete columns using fiber reinforced polymers", Eng.Struct., 32(4), 964-973. https://doi.org/10.1016/j.engstruct.2009.12.021
  26. Pantazopoulou, S. J., Bonacci, J., Sheikh, S., Thomas, M. and Hearn, N. (2001), "Repair of corrisiondamaged columns with FRP wraps", J. Compos. Constr., 5(1), 3-11. https://doi.org/10.1061/(ASCE)1090-0268(2001)5:1(3)
  27. Pantelides, C., Gergely, J., Reaveley, L. and Volnyy, V. (1999), "Retrofit of RC bridge pier with CFRP Advanced Composites", J. Struct. Eng., 125(10), 1094-1099. https://doi.org/10.1061/(ASCE)0733-9445(1999)125:10(1094)
  28. Rousakis, T. and Karabinis, A. (2008), "Substandard reinforced concrete members subjected to compression: FRP confining effects", Mater. Struct., 41(9), 1595-1611. https://doi.org/10.1617/s11527-008-9351-4
  29. Saadatmanesh, H., Ehsani, M.R. and Jin, L. (1997a), "Repair of earthquake-damaged RC columns with FRP wraps", ACI Struct. J., 94(2), 206-215.
  30. Saadatmanesh, H., Ehsani, M.R. and Jin, L. (1997b), "Seismic retrofitting of rectangular bridge columns with composite straps", Earthq. Spectra., 13(2), 281-304. https://doi.org/10.1193/1.1585946
  31. Saadatmanesh, H., Ehsani, M.R. and Li, M.W. (1994), "Strength and Ductility of concrete columns Externally Reinforced with Fiber Composite Strapes", ACI Struct. J., 91(4), 434-447.
  32. Saadatmanesh, H., Ehsani, M.R. and Jin, L. (1996), "Seismic strengthening of circular bridge pier model with fiber composites", ACI Struct. J., 93(6), 639-647.
  33. Seible, F., Priestley, M.J.N., Hegemier, G.A. and Innamorato, D. (1997), "Seismic retrofit of RC columns with continuous carbon fiber jackets", J. Compos. Constr., 1(2), 52-62. https://doi.org/10.1061/(ASCE)1090-0268(1997)1:2(52)
  34. Sheikh, S.A. and Bayrak, O. (2001), "Seismic behaviour of FRP-Retrofitted concrete columns", Proceedings of Structures Congress 2001, Washington D.C., USA, May.
  35. Sheikh, S.A. and Yau, G. (2002), "Seismic behavior of concrete columns confined with steel and fiberreinforced polymers", ACI Struct. J., 99(1), 72-80.
  36. Scott, B.D, Park, R. and Priestley, M.J.N (1982), "Stress-strain behavior of concrete confined by overlapping hoops at low and high strain rates", ACI Mater. J., 79 (1), 13-27.
  37. Teng, J., Jiang, T., Lam, L. and Luo, Y. (2009), "Refinement of a design-oriented stress--strain model for FRP-confined concrete", J. Compos. Constr., 13(4), 269-278. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000012
  38. Thermou, G.E. and Pantazopoulou, S.J. (2009), "Fiber-reinforced polymer retrofitting of predamaged substandard RC prismatic members", J. Compos. Constr., 13(6), 535-546. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000057
  39. Wei, H., Wu, Z. and Zhang, P. (2010), "Axial experiment on CFRP confined steel reinforced concrete columns with partial deteriorated strength", J. Reinf. Plast. Comp., 29(6), 874-882. https://doi.org/10.1177/0731684408100739
  40. Wei, H., Wu, Z., Guo, X. and Yi, F. (2009), "Experimental study on partial deteriorated strength concrete columns confined with CFRP", Eng. Struct., 31(10), 2495-2505. https://doi.org/10.1016/j.engstruct.2009.05.006
  41. Wei, H. (2009), "Compressive performance study on CFRP wrapped concrete columns with partial deteriorated strength", Ph.D. Dissertation, Dalian University of technology, Dalian.
  42. Xiao, Y., Wu, H. and Martin, G.R. (1999), "Prefabricated composite jacketing of RC columns for enhanced shear strength", J. Struct. Eng., 125(3), 255-264. https://doi.org/10.1061/(ASCE)0733-9445(1999)125:3(255)
  43. Yalcin, C. and Kaya, O. (2004), "An experimental study on the behavior of reinforced concrete columns using FRP material", 13th World Conference on Earthquake Engineering, Vancouver B.C., Canada, August.
  44. Yalcin, C., Kaya, O. and Sinangil, M. (2008), "Seismic retrofitting of R/C columns having plain rebars using CFRP sheets for improved strength and ductility", Constr. Build. Mater., 22(3), 295-307. https://doi.org/10.1016/j.conbuildmat.2006.08.017
  45. Yu, J., Zhang, Y. and Lu, Z. (2014), "Seismic rehabilitation of RC frame using epoxy injection technique tested on shaking table", Struct. Eng. Mech. 52(3), 541-558. https://doi.org/10.12989/sem.2014.52.3.541
  46. Yuan, X., Xia, S., Lam, L. and Smith, S.T. (2008), "Analysis and behaviour of FRP-confined short concrete columns subjected to eccentric loading", J. Zhejiang. Univ-Sc A., 1(9), 38-49.
  47. Zhu, Z., Ahmad, I. and Mirmiran, A. (2006), "Fiber element modeling for seismic performance of bridge columns made of concrete-filled FRP tubes", Eng. Struct. 28(14), 2023-2035. https://doi.org/10.1016/j.engstruct.2006.03.031

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