A multi-mechanical nonlinear fibre beam-column model for corroded columns

Mohammad Mehdi Kashani, Laura N Lowes, Adam J Crewe, Nicholas A Alexander

Research output: Contribution to journalArticle (Academic Journal)peer-review

11 Citations (Scopus)
357 Downloads (Pure)


A new modelling technique is developed to model the nonlinear behaviour of corrosion damaged reinforced concrete (RC) bridge piers subject to cyclic loading. The model employs a nonlinear beam-column element with multi-mechanical fibre sections using OpenSees. The nonlinear uniaxial material models used in the fibre sections account for the effect of corrosion damage on vertical reinforcing, cracked cover concrete due to corrosion of vertical bars and damaged confined concrete due to corrosion of horizontal tie reinforcement. An advance material model is used to simulate the nonlinear behaviour of the vertical reinforcing bars that accounts for combined impact of inelastic buckling and low-cycle fatigue degradation. The basic uncorroded model is verified by comparison of the computation and observed response of RC columns with uncorroded reinforcement. This model is used in an exploration study of recently tested reinforced concrete components to investigate the impact of different corrosion models on the inelastic response of corrosion damaged RC columns.
Original languageEnglish
Pages (from-to)213-226
Number of pages14
JournalInternational Journal of Structural Integrity
Issue number2
Publication statusPublished - 31 Mar 2016


  • Corrosion
  • Low-cycle fatigue
  • Bridge pier
  • Finite element modelling
  • Reinforcement buckling


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