Structural Engineering and Mechanics

  • 제23권1호
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  • Pages.43-61
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  • 2006
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
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DOI QR Code

Interface treatment in shotcrete jacketing of reinforced concrete columns to improve seismic performance

  • Vandoros, Konstantinos G. (University of Patras, Department of Civil Engineering) ;
  • Dritsos, Stephanos E. (University of Patras, Department of Civil Engineering)
  • 투고 : 2005.06.16
  • 심사 : 2006.01.20
  • 발행 : 2006.05.10
⟨ 이전 논문 다음 논문 ⟩

초록

An investigation of the effectiveness of the interface treatment when column concrete jacketing is performed is presented. Alternative methods of interface connection were used in order to investigate the performance of strengthened concrete columns. These connecting techniques involved roughening the surface of the original column, embedding steel dowels into the original column and a combination of these two techniques. The experimental program included three strengthened specimens, one original specimen (unstrengthened) and one as-built specimen (monolithic). The specimens represented half height full-scale old Greek Code (1950's) designed ground floor columns of a typical concrete frame building. The jackets of the strengthened specimens were constructed with shotcrete. All specimens were subjected to displacement controlled earthquake simulation loading. The seismic performance of the strengthened specimens is compared to both the original and the monolithic specimens. The comparison was performed in terms of strength, stiffness and hysteretic response. The results demonstrate the effectiveness of the strengthening methods and indicate that the proper construction of a jacket can improve the behaviour of the specimens up to a level comparable to monolithic behaviour. It was found that different methods of interface treatment could influence the failure mechanism and the crack patterns of the specimens. It was also found that the specimen that combined roughening with dowel placement performed the best and all strengthened columns were better at dissipating energy than the monolithic specimen.

키워드

참고문헌

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피인용 문헌

  1. Flexural Behavior of Brittle RC Members Rehabilitated with Concrete Jacketing vol.133, pp.10, 2007, https://doi.org/10.1061/(ASCE)0733-9445(2007)133:10(1373)
  2. Modeling of RC columns strengthened with RC jackets vol.40, pp.15, 2011, https://doi.org/10.1002/eqe.1109
  3. Flexural behaviour of reinforced concrete jacketed columns under reversed cyclic loading vol.76, 2014, https://doi.org/10.1016/j.engstruct.2014.07.013
  4. Monolithic Coefficient Values for Design when Seismically Strengthening RC Columns with Jackets vol.16, pp.7, 2012, https://doi.org/10.1080/13632469.2012.689120
  5. Axial preloading effects when reinforced concrete columns are strengthened by concrete jackets vol.8, pp.3, 2006, https://doi.org/10.1002/pse.215
  6. Concrete jacket construction detail effectiveness when strengthening RC columns vol.22, pp.3, 2008, https://doi.org/10.1016/j.conbuildmat.2006.08.019
  7. Seismic retrofit of buildings vol.38, pp.3, 2005, https://doi.org/10.5459/bnzsee.38.3.165-181
  8. Seismic strengthening of columns by adding new concrete vol.40, pp.2, 2006, https://doi.org/10.5459/bnzsee.40.2.49-68
  9. Pre-earthquake fuzzy logic and neural network based rapid visual screening of buildings vol.27, pp.1, 2007, https://doi.org/10.12989/sem.2007.27.1.077
  10. Mesoscopic study on historic masonry vol.30, pp.1, 2006, https://doi.org/10.12989/sem.2008.30.1.099
  11. Monolithic coefficient design values for seismically strengthening RC columns with jackets vol.3, pp.2, 2006, https://doi.org/10.1002/cepa.971
  12. Analysis-oriented model for seismic assessment of RC jacket retrofitted columns vol.37, pp.3, 2006, https://doi.org/10.12989/scs.2020.37.3.371