Computers and Concrete

  • 제15권1호
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  • Pages.73-88
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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

Repaired concrete columns with fiber reinforced thixotropic mortar: experimental & FEA approach

  • Achillopoulou, Dimitra V. (Civil engineering Department, Democritus University of Thrace) ;
  • Arvanitidou, Konstantinia C. (Civil engineering Department, Democritus University of Thrace) ;
  • Karabinis, Athanasios I. (Civil engineering Department, Democritus University of Thrace)
  • 투고 : 2014.01.12
  • 심사 : 2014.11.09
  • 발행 : 2015.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Following previous studies, the current paper describes the results of an experimental program concerning the repair of reinforced concrete columns by thixotropic pseudo plastic mortar, preformed to analyze and quantify the influence of initial construction damage to the behavior of the repaired element. Five columns (section scale 1:2) were designed according to the minimum requirements of reinforcement of ductility orientated codes' design with variables the percentages of initial construction damages. All were tested in axial compression with repeated cycles up to failure. For comparison reasons, another one of the same characteristics, yet healthy, was constructed and tested as a reference specimen. A numerical study (Finite Element Analysis) was conducted for further investigation of the behavior of the thixotropic mortar as repair material. The results indicate that: a) surpassing a specific amount of damage, columns even suitably repaired present lower strain capacity, b) finite element analysis present the same way of deboning of the repaired material taking into consideration the buckling of the reinforcement bars.

키워드

참고문헌

  1. Vecchio, F. and Bucci, F. (1999), "Analysis of repaired reinforced concrete structures", J. Struct. Eng., 125(6), 644-652 https://doi.org/10.1061/(ASCE)0733-9445(1999)125:6(644)
  2. Vintzileou, E. and Palieraki, V. (2007), Shear Transfer along Interfaces in Repaired/Strengthened RC Elements subjected to Cyclic Actions, Beton-und Stahlbetonbau 102, Special Edition, 60-65
  3. Austin, S., Robins, P. and Pan, Y. (1999), "Shear bond testing of concrete repairs", Cement Concrete Res., 29, 1067-1076 https://doi.org/10.1016/S0008-8846(99)00088-5
  4. EN 1504: European Standard: Products and systems for the protection and repair of concrete structures-Definitions, requirements, quality control and evaluation of conformity, European Committee for Standardization, (April 2013).
  5. Achillopoulou, D.V. and Karabinis, A.I. (2014), "Initial construction damage effect on the behaviour of reinforced concrete columns", Proceedings of 2nd European Conference on Earthquake Engineering and Seismology, Istanbul.
  6. Achillopoulou, D.V. and Karabinis, I.A. (2013), "Investigation of shear transfer mechanisms in repaired damaged concrete columns strengthened with RC jackets", Struct. Eng. Mech., 47(4), 575-598. https://doi.org/10.12989/sem.2013.47.4.575
  7. Achillopoulou, D.V., Rousakis, T.C. and Karabinis, I.A. (2012), "Force transfer between existing concrete columns with reinforced concrete jackets subjected to pseudoseismic axial loading", Proceeding of 15th WCEE, Lisbon.
  8. Di Ludovico, M., Verderame, G., Prota, A., Manfredi, G. and Cosenza, E. (2013), "Experimental behavior of nonconforming RC columns with plain bars under constant axial load and biaxial bending", J. Struct. Eng., 139(6), 897-914. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000703
  9. Henkhaus, K., Pujol, S. and Ramirez, J. (2013), "Axial failure of reinforced concrete columns damaged by shear reversals", J. Struct. Eng., 139, SPECIAL ISSUE: NEES 1: Advances in Earthquake Engineering, 1172-1180.
  10. Karayannis, C. and Chalioris, C. (2000), "Capacity of RC joints subjected to early-age cyclic loading", J. Earthq. Eng., 4(4), 479-509. https://doi.org/10.1080/13632460009350380
  11. Karayannis, C., Chalioris, C. and Sideris, K. (1998), "Effectiveness of RC beam-column connection repair using epoxy resin injections", J. Earthq. Eng., 2(2), 217-240 https://doi.org/10.1080/13632469809350320
  12. Karayannis, C. and Sirkelis, G. (2008), "Strengthening and rehabilitation of RC beam-column joints using carbon-FRP jacketing and epoxy resin injection", Earthq. Eng. Struct. Dyn., 37(5), 769-790 https://doi.org/10.1002/eqe.785
  13. Ge, Y., Yang, W., Yuan, J. and Zhang, B. (2009), "Effect of inorganic salts on frost resistance of concrete", ICCTP 2009: pp. 1-6
  14. Jin, S., Zhang, J. and Huang, B. (2013), "The relationship between freeze-thaw resistance and pore Structure of concrete", Pavement and Geotechnical Engineering for Transportation, pp. 60-67.
  15. Kupwade-Patil, K. and Allouche, E. (2013), "Examination of chloride-induced corrosion in reinforced geopolymer concretes", J. Mater. Civ. Eng., 25(10), 1465-1476. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000672
  16. Sideris, K.K. and Savva, A.E. (2005), "Durability of mixtures containing calcium nitrite based corrosion inhibitor", Cement Concrete Compos., 27(2), 277-287. https://doi.org/10.1016/j.cemconcomp.2004.02.016
  17. Mostafaei, H., Vecchio, F. and Benichou, N. (2009), "Seismic resistance of fire-damaged reinforced concrete columns", Improving the Seismic Performance of Existing Buildings and Other Structures, 1396-1407.
  18. Raut, N. and Kodur, V. (2011), "Response of high-strength concrete columns under design fire exposure", J. Struct. Eng., 137(1), 69-79. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000265
  19. Fardis, M.N. (2009), "Seismic Design, assessment and retrofitting of concrete buildings, based on ENEurocode 8", Geotechnical, geological and earthquake engineering, Springer.
  20. American Concrete Institute (2008), "Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary", ACI-318R-08 Building Code.
  21. European Standard EN (2005), "Eurocode 8 Design of structures for earthquake resistance, Part 3: Assessment and retrofitting of Buildings".
  22. G.Re.Co. Greek Organisation of Seismic Design and Protection (2013), "Greek retrofit code attuned to EN 1998/3" (In Greek).
  23. American Concrete Institute (2008), "Building code requirements for structural concrete (ACI 318-08) and commentary", ACI-318R-08 Building Code.
  24. Bach, A., Stoltz, A., Noldgen, M. and Thona, K. (2013), "Modelling of preloaded reinforced concrete structures at different loading rates", Proceedings of the 8th International Conference on Facture Mechanics of Concrete Structures, FraMCoS, 1001-1011, Toledo.
  25. Karabinis, A. and Kiousis, P. (2001), "Plasticity model for reinforced concrete elements subjected to overloads", J. Struct. Eng., 127(11), 1251-1256. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:11(1251)
  26. BASF technical guides for Emaco S88C T Shrinkage compensated, polymer fiber reinforced, thixotropic repair mortar.
  27. Foti, D. and Vacca, S. (2013), 'Mechanical behavior of concrete columns reinforced with rheoplastic mortars", Mater. Construct., 63(310), 267-282. https://doi.org/10.3989/mc.2012.03512
  28. European Standard EN (2005), "Eurocode 8 dzesign of structures for earthquake resistance, Part 3: Assessment and retrofitting of Buildings".
  29. EN 206-1: European Standard: Concrete-Part1: Specification, performance, production and conformity (December 2000), European Committee for Standardization.
  30. ACI 309R-06: Guide for Consolidation of Concrete, ACI Committee 309 (May 2006), American Concrete Institute.
  31. Ansys Workbench Tutorials
  32. Building Works Standards and Technical Guidelines (2008), Technical Chamber of Greece

피인용 문헌

  1. Assessment of concrete columns repaired with fiber reinforced mortar through damage indexes and numerical model vol.81, pp.None, 2015, https://doi.org/10.1016/j.conbuildmat.2015.02.044
  2. Strengthening of axially and eccentrically compression loaded RC columns with UHPC jacketing system: Experimental investigation and finite element modeling vol.245, pp.None, 2015, https://doi.org/10.1016/j.engstruct.2021.112850