Analytical Evaluation of Structural Performance of Reinforced Concrete Beams Considering Degree of Reinforcing Bar Corrosion

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Title: Analytical Evaluation of Structural Performance of Reinforced Concrete Beams Considering Degree of Reinforcing Bar Corrosion

Author(s): H.-S. lee, T. Noguchi, and F. Tomosawa

Publication: Special Publication

Volume: 193

Issue:

Appears on pages(s): 779-790

Keywords: beam; concrete (reinforced); corrosion; flexural strength

Date: 8/1/2000

Abstract:
The losses in the structural performance of reinforced concrete members with corroded rebars are caused by the loss in the effective cross-sectional area of concrete due to cracking in the cover concrete, loss in the mechanical performance of rebars due to the loss in their cross-sectional area, and loss in the bond performance of concrete with rebars. Accordingly, the mechanism of the reduction in the performance of concrete structural members with corroded rebars may be elucidated using the finite element method (FEM), if the constitutive law for each material factor can be derived using the degree of rebar corrosion as a parameter. The purpose of this study is to investigate the relationship between the degree of rebar corrosion and the structural performance of RC beams damaged by rebar corrosion with the FEM. As a result, the structural performance of RC beams damaged by rebar corrosion can be analyzed with the FEM using experimentally determined material models representing the bond properties between concrete and the corroded rebars and the mechanical properties of corroded rebars. So, it is needed to investigate the bond properties and the mechanical properties of the corroded rebar considering degree of rebar corrosion to evaluate the strength of RC beams damaged by rebar corrosion with cross section analysis method which has been used conventionally.