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Prestress Monitoring of Internal Steel Strands Using the Magnetoelastic Inductance Method

By Lei Liu, Senhua Zhang, Jianting Zhou, Hong Zhang, Huiling Liu, Kui Tan, and Leng Liao
Progress In Electromagnetics Research M, Vol. 103, 1-13, 2021


Monitoring the prestress of prestressed steel strands is important but difficult. The magnetoelastic inductance (MI) method is used to monitor the prestress. A coupling model was established to describe the correlation among stress, magnetism, and inductance. A prestress monitoring system based on the MI effect was proposed. To verify the feasibility of the method, experiments were carried out. The results showed that influenced by the hydration heat of the grouting materials, the fluctuation range of the inductance was 1.033%. When the hydration came to an end, the inductance approached the initial inductance. For internal steel strands, the obtained inductance-prestress relationship was similar to the relationship of external steel strands. Thus, the prestress of the internal steel strands could be monitored by the MI method.


Lei Liu, Senhua Zhang, Jianting Zhou, Hong Zhang, Huiling Liu, Kui Tan, and Leng Liao, "Prestress Monitoring of Internal Steel Strands Using the Magnetoelastic Inductance Method," Progress In Electromagnetics Research M, Vol. 103, 1-13, 2021.


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