APPLICATION OF THE MODIFIED MAGNETOELASTIC METHOD AND AN ANALYSIS OF THE MAGNETIC FIELD

Tomáš Klier, Tomáš Míčka, Michal Polák, Tomáš Plachý, Milan Hedvábný, Roman Jelínek, Filip Bláha

Abstract


In the technical praxis there is very often a need of axial force determination in the important structural elements of a building during its construction or operational state. The paper presents practical application of the new approach based on the magnetoelastic principle, especially aimed on experimental evaluation of the axial forces in the prestressed reinforcement on prestressed concrete structures. Described approach is usable not only for newly built structures but in particular for existing ones. The experiment was realized on a prestressed concrete beam dismantled from a bridge that was put out of operation. The influence of a simulated defect of the reinforcement on its magnetoelastic properties has also been investigated. During result evaluation, the knowledge based on the theoretical analysis of the electromagnetic field was used.

Keywords


concrete, tensile force, magnetoelastic method, prestressed strand, prestressed cable, prestressed wire, elastomagnetic sensor

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ISSN 2336-5382 (Online)
Published by the Czech Technical University in Prague