Techno Press

Computers and Concrete   Volume 8, Number 5, October 2011, pages 541-561
Modelling seismically repaired and retrofitted reinforced concrete shear walls
W. Leonardo Cortes-Puentes and Dan Palermo

Abstract     [Full Text]
    The Finite Element Method (FEM) was employed to demonstrate that accurate simulations of seismically repaired and retrofitted reinforced concrete shear walls can be achieved provided a good analysis program with comprehensive models for material and structural behaviour is used. Furthermore, the analysis tool should have the capability to retain residual damage experienced by the original structure and carry it forward in the repaired and retrofitted structure. The focus herein is to provide quick, simple, but reliable modelling procedures for repair and retrofitting strategies such as concrete replacement, addition of diagonal reinforcing bars, bolting of external steel plates, and bonding of external steel plates and fibre reinforced polymer sheets, thus illustrating versatility in the modelling. Slender, squat, and slender-squat shear walls were investigated. The modelling utilized simple rectangular membrane elements for the concrete, truss bar elements for the steel and FRP retrofitting materials, and bond-link elements for the bonding interface between steel or FRP to concrete. The analyses satisfactorily simulated seismic behaviour, including lateral load capacity, displacement capacity, energy dissipation, hysteretic response, and failure mode.
Key Words
    finite element modelling; reinforced concrete shear walls; seismic repair; seismic retrofitting; nonlinear finite element analysis.
W. Leonardo Cortes-Puentes and Dan Palermo: Department of Civil Engineering, University of Ottawa, 161 Louis Pasteur,
Ottawa, ON, Canada, K1N 6N5

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