STRESS MEASUREMENT OF STEEL BAR USING MAGNETORESTRICTION
In an attempt to measure existing steel stress using magnetoelasticity, a device has been developed and used for the measurement of magnetism in response to the deformation of a steel bar. The proposed technique can be used for the assessment of existing reinforced concrete structures by the measurements of steel stress embeded inside concrete. A traditional technique requires to break the existing steel bar to measure existing strain. However, the proposed technique does not require to break the steel bar for the measurements. A successful application of magnetoelasticity depends on the linearity of the relationship between the elastic and magnetic response due to loading. To investigate the correlation between two, steel bars are loaded in tension under uniaxial loading while the magnetic reading is recorded. Results showed linearity or partial-linearity of the elastic behavior of steel bars in relation to magnetic change. In the paper, the various factors affecting the measurements are also discussed.
Hong C. Rhim Young Sik Cho
Department of Architectural Engineering, Yonsei University, Seoul 120-749, Korea
国际会议
长沙
英文
977-980
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）