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http://dx.doi.org/10.7734/COSEIK.2018.31.2.115

Magnetic Hysteresis Monitoring according to the Change of Tensile Force and Steel Class of PS Tendons  

Kim, Junkyeong (Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan Univ.)
Park, Seunghee (Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan Univ.)
Lee, Hwanwoo (Department of Civil Engineering, Pukyong National Univ.)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.31, no.2, 2018 , pp. 115-120 More about this Journal
Abstract
This paper introduces a magnetic hysteresis monitoring result to apply an EM sensing technique for estimating tensile force of PSC girder to various class of PS tendon. The tensile force of PS tendon is a very important factor in the performance evaluation of PSC bridges. However, in this time, the tensile force was just measured only during construction and it does not monitored after construction. To measure the tensile force of PS tendons, the EM sensing based NDT method was developed but the proposed method cannot be applied to various class of PS tendons. Thus this study performed the magnetic hysteresis measurement according to the tensile force for class B, C and D PS tendons through experimental study. The specific tensile forces(50, 100, 150, 180kN) were induced to the each specimens and the magnetic hysteresis curve was measured at each point. The permeability of specimens were gradually decreased according to increase of tensile force. Especially, the slopes of permeability variation of class B and C were similar while that of class D was different.
Keywords
tensile force monitoring; magnetic hysteresis measurement; EM sensor; PS tendon; PSC bridge;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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