Magnetic variation in construction steels under tensile stress. Empirical research with Helmholtz coils

D.  Ferrández; C.  Morón; P.  Saiz; A.  Morón

doi:10.3989/mc.2021.06020

Authors

D. Ferrández Departamento de Ingeniería de Organización, Administración de Empresas y Estadística, Universidad Politécnica de Madrid https://orcid.org/0000-0003-3842-547X
C. Morón Departamento de Tecnologías de la Edificación, Universidad Politécnica de Madrid https://orcid.org/0000-0002-6928-5134
P. Saiz Universidad Rey Juan Carlos, Departamento de Economía Financiera, Contabilidad e Idioma Moderno https://orcid.org/0000-0001-8106-0432
A. Morón Departamento de Tecnologías de la Edificación, Universidad Politécnica de Madrid https://orcid.org/0000-0003-4818-0437

DOI:

https://doi.org/10.3989/mc.2021.06020

Keywords:

Magnetical properties, Steel, Tensile Strength, Permeability

Abstract

Steel is responsible for providing resistance to flexotraction to reinforced concrete structures. Steel is responsible for providing reinforced concrete structures with a flexural strength. For this reason, it is important to study its behaviour under different tensile states. This study used measuring equipment that was able to determine variations in magnetic properties of B500-SD steel bars during standard tensile tests. The magnetic field generated by a Helmholtz coil was collected through a secondary circuit. This enables the induced electromotive force to relate with the steel deflection stages when subjected to the tests. Moreover, it was possible to determine the variation of magnetic permeability when submitting 12mm and 16mm diameter bars to different tensile states. This method could prove extremely useful in determining the tensile state of ribbed steel bars that are embedded into the concrete structure.

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