Effects of Corrosion of Steel Reinforcement on RC Columns Wrapped with FRP Sheets

Abstract

This study investigated the effectiveness of carbon fiber-reinforced polymer (CFRP) sheets in protecting reinforced concrete (RC) columns from corrosion of steel reinforcement. Thirty small-scale RC columns and four midscale RC columns were used in this study. The small-scale columns were used for a comprehensive parametric study, whereas the midscale columns were used to evaluate design guidelines proposed based on the results of the small-scale column tests. The test columns were conditioned under an accelerated corrosion process and then tested under uniaxial compression up to failure. The test results showed that although CFRP sheet wrapping decreased the corrosion rate, the corrosion of steel reinforcement could continue to occur, eventually showing a decrease in ultimate axial compression capacity. Design guidelines were proposed based on the small-scale RC column tests and evaluated through a comparison with the test results of midscale RC columns. The proposed design guidelines introduced a concept of effective area to account for the corrosion damage, such as internal cracking and cross-sectional loss of steel reinforcement.

Department(s)

Civil, Architectural and Environmental Engineering

Sponsor(s)

Missouri. Department of Transportation
National University Transportation Center

Keywords and Phrases

Concrete Columns; Corrosion; Durability; Fiber Reinforced Polymers; Sheets

International Standard Serial Number (ISSN)

0887-3828

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 American Society of Civil Engineers (ASCE), All rights reserved.

Publication Date

01 Jan 2009

Link to Full Text

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