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Monitoring of Cylindrical Rod Tension Force under Varying Temperature using Acoustoelastic Effect

This paper presents the development of a tension force monitoring technique based on bulk wave and acoustoelastic effect for a cylindrical rod in the suspension bridge anchor system under varying temperature. First, a cylindrical rod specimen is fabricated, and macro fiber composites transducers are installed on the specimen. Then, the bulk waves are measured under various tension force levels and temperature conditions. The measured bulk waves are used to estimate the tension force level after compensating the temperature effect. The performance of the developed technique is examined using test data. The uniqueness of the developed technique includes (1) tension force estimation of the mock-up specimen of the real bridge using the acoustoelastic effect and (2) temperature compensation on the tension force monitoring without temperature measurement.