AE法によるRC床版健全性評価指標の温度依存性調査および弾性波伝搬解析による検証

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  • Investigation of Temperature Dependence of RC Slab Soundness Evaluation Index using AE Method and Verification using Elastic Wave Propagation Analysis

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<p>We have proposed a soundness evaluation method for RC slabs. In this method, when AE generated on a road surface while a vehicle is running is observed using an AE sensor installed on the underside of the RC slab, the more the RC slab deteriorates, the more the propagation of elastic waves is hindered, and the density of the observed AE source becomes thinner. It was confirmed that the temperature is a variable factor of the index when AE source density is used as a soundness evaluation index. Verification of the fluctuation factor by elastic wave propagation analysis revealed that the temperature dependence of the elastic modulus of the pavement affects the detection waveform of the AE sensor on the bottom surface of the RC slab. In addition, consistency with the fluctuation of the soundness evaluation index in the AE measurement results was confirmed.</p>

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