Title: Evaluation of ultimate capacity of corrosion damaged reinforced concrete beam-columns using nonlinear sectional analysis
Authors: Amina Mohammed; Husham H. Almansour; Beatriz Martín-Pérez
Addresses: Civil Engineering Infrastructure Unit, National Research Council Canada, 1200 Montreal Road, Building M-20, Ottawa, Ontario K1A 0R6, Canada ' Civil Engineering Infrastructure Unit, National Research Council Canada, 1200 Montreal Road, Building M-20, Ottawa, Ontario K1A 0R6, Canada ' University of Ottawa, CBY A306, 161 Louis Pasteur, Ottawa, Ontario K1N 6N5, Canada
Abstract: A simplified nonlinear sectional analysis approach (NLSA) of aged reinforced concrete beam-columns based on numerical integration, enhanced inspection, material testing and/or empirical estimation of materials deterioration due to reinforcement corrosion is proposed. The proposed procedure is an iterative nonlinear technique that uses numerical integration of the sectional stresses and satisfies force equilibrium in every load increment step. The NLSA model incorporates corrosion-induced damage by reducing the steel cross section and ductility, removing the loss of concrete cover, and accounting for the loss of local bond in corrosion-damaged zones. Two case studies are presented to estimate the effects of corrosion on the structural behaviour of reinforced concrete beam-columns by taking into account critical damage states. The model results show good agreement with test results, high numerical stability and consistent convergence for all examined loading cases.
Keywords: nonlinear sectional analysis; NLSA; RC beam-column; reinforcement corrosion; assessment framework; aged bridge structure.
International Journal of Structural Engineering, 2020 Vol.10 No.2, pp.95 - 119
Accepted: 16 May 2019
Published online: 06 Mar 2020 *