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The influenced of localized corrosion on the natural frequency in the reinforced concrete beam

Ismail, Noorli and Yusof, Hanita and Md Jaafar, Mohd Faizal (2015) The influenced of localized corrosion on the natural frequency in the reinforced concrete beam. In: Third International Civil and Infrastructure Engineering Conference (InCIEC2015), 21-22 September 2015, Kuala lumpur, Malaysia.

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This study presents the use of natural frequency for the identification of damage location in detecting the location and severity of corrosion in reinforced concrete beam models. The simply supported beam was modeled with five different corrosion factors, f using DIANA Release 9.1 software. The simulation models was applied in uncorroded beam (Beam UC) and corroded beam with corrosion factor of 8% (Beam LD8), 16% (Beam LD16), 32% (Beam LD32) and 64% (Beam LD64). The total span of 2200mm with twenty locations in the steel bar was analyzed for localized corrosion including the distance near to supports. The technique was necessitated with the performance of linear, nonlinear and eigenvalue analysis. The ratio of frequency drop of fcorrode/uncorrode was obtained to visualize all modes at the corroded location. The results of frequency drop illustrated that the poorest location of corrosion was detected at x/L between 0.4 and 0.7. It can be concluded, the ratio of fcorrode/uncorrode can be used to damage indicator to detect the localized corrosion.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Finite element analysis; natural frequency; DIANA software; eigenvalue analysis
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA630-695 Structural engineering (General)
Divisions: Faculty of Civil and Environmental Engineering > Department of Construction Engineering and Architecture
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 13 Aug 2018 03:21
Last Modified: 13 Aug 2018 03:21
URI: http://eprints.uthm.edu.my/id/eprint/8680
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