Analysis of the flexural response of hybrid reinforced concrete beams with localized reinforcement corrosion

Author:

Berrocal Carlos G.12ORCID,Chen E3ORCID,Löfgren Ingemar12ORCID,Lundgren Karin1ORCID

Affiliation:

1. Structural Engineering Division Chalmers University of Technology Gothenburg Sweden

2. Thomas Concrete Group C‐lab Gothenburg Sweden

3. School of Civil and Hydraulic Engineering Huazhong University of Science and Technology Wuhan China

Abstract

AbstractThis paper presents a modeling approach to analyze the flexural response of hybrid reinforced concrete beams with localized corrosion. A new mechanical model based on extensive uniaxial testing is proposed to describe the stress–strain relationship of corroded bars with a single pit. The proposed mechanical model is then incorporated into a sectional analysis to determine the moment curvature relationship of hybrid reinforced concrete sections with pitting corrosion. The actual crack pattern is used to divide a beam into discrete hinge elements which are then combined to compute the load–deflection response of statically determinate beams. The modeling approach is evaluated with available experimental data showing good predictive capabilities. A parametric study revealed the importance of the interaction between the tensile reinforcement ratio and the concrete postcracking residual stress. Furthermore, the deformation capacity of reinforcement bars with pitting corrosion levels beyond 0.25 was shown to have a dominant effect on the ultimate deflection of hybrid reinforced concrete beams.

Funder

Trafikverket

Publisher

Wiley

Subject

Mechanics of Materials,General Materials Science,Building and Construction,Civil and Structural Engineering

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