Structural Engineering and Mechanics

  • 제61권1호
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  • Pages.1-13
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  • 2017
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Seismic repair of captive-column damage with CFRPs in substandard RC frames

  • Tunaboyu, Onur (Department of Civil Engineering, Anadolu University) ;
  • Avsar, Ozgur (Department of Civil Engineering, Anadolu University)
  • 투고 : 2016.03.11
  • 심사 : 2016.08.09
  • 발행 : 2017.01.10
⟨ 이전 논문 다음 논문 ⟩

초록

The effectiveness of the repair scheme for the damaged captive-columns with CFRPs (Carbon Fiber Reinforced Polymer) was investigated in terms of response quantities such as strength, ductility, dissipated energy and stiffness degradation. Two 1/3 scale, one-story one-bay RC (Reinforced Concrete) frames were designed to represent the substandard RC buildings in Turkish building stock. The first one, which is the reference specimen, is the bare frame without infill wall. Partial infill wall with opening was constructed between the columns of the second frame and this caused captive column defect. Severe damage was observed with the concentration of shear cracks in the second specimen columns. Then, the damaged members were repaired by CFRP wrapping and retested. For the three test series, similar reversed cyclic lateral displacement under combined effect of axial load was applied to the top of the columns. Overall response of the bare frame was dominated by flexural cracks. Brittle type of shear failure in the column top ends was observed in the specimen with partial infill wall. It was observed that former capacity of damaged members of the second frame was recovered by the applied repair scheme. Moreover, ultimate displacement capacity of the damaged frame was improved considerably by CFRP wrapping.

키워드

과제정보

연구 과제 주관 기관 : Anadolu University

참고문헌

  1. Akin, E., Canbay, E., Binici, B. and O zcebe, G. (2015), "Scale effect on CFRP strengthening of infilled reinforced concrete frames", J. Adv. Concrete Tech., 13, 355-366. https://doi.org/10.3151/jact.13.355
  2. Altin, S., Anil, O., Ocakli, O. and Kopraman, Y. (2011), "Retrofitting of shear damaged RC beams using diagonal CFRP strips", J. Reinf. Plast. Compos., 30(17), 1495-1507. https://doi.org/10.1177/0731684411421843
  3. Avsar, O. and Tunaboyu, O. (2014), "Influence of structural walls on the seismic performance of RC buildings during the May 19, 2011 Simav Earthquake in Turkey", J. Perform. Constr. Facil., 28(4), 04014016. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000473
  4. Bazant, Z. (1993), "Scaling laws in mechanics of failure", J. Eng. Mech., 119(9), 1828-1844. https://doi.org/10.1061/(ASCE)0733-9399(1993)119:9(1828)
  5. Cagatay, I. (2005), "Failure of an industrial building during a recent earthquake in Turkey", Eng. Fail. Anal., 12, 497-507. https://doi.org/10.1016/j.engfailanal.2004.09.004
  6. Colomb, F., Tobbi, H., Ferrier, E. and Hamelin, P. (2008), "Seismic retrofit of reinforced concrete short columns by CFRP materials", Compos. Struct., 82, 475-487. https://doi.org/10.1016/j.compstruct.2007.01.028
  7. Fayyadh, M.M. and Razak, A.H. (2014), "Analytical and experimental study on repair effectiveness of CFRP sheets for RC beams", J. Civil Eng. Manage., 20(1), 21-31. https://doi.org/10.3846/13923730.2013.799095
  8. FEMA-356 (2000), Prestandard and commentary for the seismic rehabilitation of buildings, Washington, D.C.
  9. Ferrier, E., Avril, S., Hamelin, P. and Vautrin, A. (2003), "Mechanical behavior of RC beams reinforced by externally bonded CFRP sheets", Mater. Struct., 36(8), 522-529. https://doi.org/10.1617/13905
  10. Guevara, L.T. and Garcia, L. (2005), "The captive-and shortcolumn effects", Earthq. Spectra 21(1), 141-160. https://doi.org/10.1193/1.1856533
  11. He, R., Grelle, S., Sneed, L.H. and Belarbi, A. (2013b), "Rapid repair of a severely damaged RC column having fractured bars using externally bonded CFRP", J. Compos. Struct., 101, 225-242. https://doi.org/10.1016/j.compstruct.2013.02.012
  12. He, R., Sneed, L.H. and Belarbi, A. (2013a), "Rapid repair of severely damaged RC columns with different damage conditions: An experimental study", Int. J. Concrete Struct. Mater., 7(1), 35-50. https://doi.org/10.1007/s40069-013-0030-7
  13. He, R., Yang, Y. and Sneed, L.H. (2015), "Seismic repair of reinforced concrete bridge columns: a review of research findings", J. Bridge Eng., ASCE, 20(12), 04015015. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000760
  14. Ilki, A., Bedirhanoglu, I. and Kumbasar, N. (2011), "Behavior of FRP-retrofitted joints built with plain bars and low-strength concrete", J. Compos. Constr., 15, 312-326. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000156
  15. Jayaguru, C. and Subramanian, K. (2012), "Retrofit of RC frames with Captive-Column defects", KSCE J. Civil Eng., 16(7), 1202-1208. https://doi.org/10.1007/s12205-012-1019-5
  16. Li, B. and Kai, Q. (2011), "Seismic behavior of reinforced concrete interior beam-wide column joints repaired using FRP", J. Compos. Constr., 15(3), 327-338. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000163
  17. Ozcan, O., Binici, B. and Ozcebe, G. (2010), "Seismic strengthening of rectangular reinforced concrete columns using fiber reinforced polymers", Eng. Struct., 32, 964-973. https://doi.org/10.1016/j.engstruct.2009.12.021
  18. Pan, J.L., Xu, T. and Hu, Z. (2007), "Experimental investigation of load carrying capacity of the slender reinforced concrete columns wrapped with FRP", Constr. Build. Mater., 21(11), 1991-1996. https://doi.org/10.1016/j.conbuildmat.2006.05.050
  19. Park, R. (1989), "Evaluation of ductility of structures and structural assemblages from laboratory testing", Bull. NZ Nat. Soc. Earthq. Eng., 22, 155-156.
  20. Pradhan, P.M., Maskey, R.K. and Pradhan, P.L. (2014), "Stiffness behavior and shear effect in partially infilled reinforced concrete frames", J. Earthq. Eng., 18(4), 580-588. https://doi.org/10.1080/13632469.2013.873373
  21. Priestley, M.J., Verma, R. and Xiao, Y. (1994), "Seismic shear strength of reinforced concrete columns", J. Struct. Eng., 120(8), 2310-2329. https://doi.org/10.1061/(ASCE)0733-9445(1994)120:8(2310)
  22. Rutledge, S.T., Kowalsky, M.J., Seracino, R. and Nau, J.M. (2013), "Repair of reinforced concrete bridge columns containing buckled and fractured reinforcement by plastic hinge relocation", J. Bridge Eng., 19(8), A4013001-1 https://doi.org/10.1061/(ASCE)BE.1943-5592.0000492
  23. 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
  24. Turkish Earthquake Code (2007), Specification for buildings to be built in seismic zones, Ankara, Turkey.
  25. Vosooghi, A. and Saiidi, M.S. (2013), "Shake-table studies of repaired reinforced concrete bridge columns using carbon fiberreinforced polymer fabrics", ACI Struct. J., 110(1), 105-114.
  26. Xie, J., Liu, X. and Zhao, T. (2005), "Shear capacity of reinforced concrete columns strengthened with CFRP sheet", J. Zhejiang Univ. SCIENCE, 6A(8), 853-858. https://doi.org/10.1631/jzus.2005.A0853
  27. 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, 295-307. https://doi.org/10.1016/j.conbuildmat.2006.08.017
  28. Yang, Y., Sneed, L.H., Morgan, A., Saiidi, M.S. and Belarbi, A. (2015a), "Repair of RC bridge columns with interlocking spirals and fractured longitudinal bars-an experimental study", Constr. Build. Mater., 78, 405-420. https://doi.org/10.1016/j.conbuildmat.2015.01.010
  29. Yang, Y., Sneed, L.H., Saiidi, M.S., Belarbi, A., Ehsani, M. and He, R. (2015b), "Emergency repair of an earthquake-damaged RC bridge column with fractured bars using externally bonded prefabricated laminates-an experimental study", J. Compos. Struct., 133, 727-738. https://doi.org/10.1016/j.compstruct.2015.07.045
  30. Yilmaz, N. and Avsar, O. (2013), "Structural damages of the May 19, 2011 Kutahya-Simav Earthquake in Turkey", Nat. Hazard., 69(1), 981-1001. https://doi.org/10.1007/s11069-013-0747-2
  31. Yurdakul, O. and Avsar, O. (2015), "Structural repairing of damaged reinforced concrete beam-column assemblies with CFRPs", Struct. Eng. Mech., 54(3), 521-543. https://doi.org/10.12989/sem.2015.54.3.521

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