Computers and Concrete

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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)
  • Received : 2014.01.12
  • Accepted : 2014.11.09
  • Published : 2015.01.25
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Abstract

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.

Keywords

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