15 March 2006 Structural evaluation of pavement using surface wave and portable FWD tests
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SASW has been well known as one of nondestructive testing methods for pavements. This method makes use of the dispersion characteristics to estimate the thickness and modulus of pavement layers. It is difficult to obtain accurate dispersion curves even if the analytical surface wave fields are used, where only the stiffness proportional damping is considered. However, the good agreement of dispersion curves has been found for the analytical surface wave fields if Rayleigh damping is adopted in the numerical simulation. In this paper, a dynamic general FEM software was developed to inverse the layer moduli and Rayleigh damping coefficient of the tested pavement structure using the portable FWD data. It shows that the predicted dispersion curves are well approximately to ones obtained from experimental SASW.
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Q. Dong, T. Kubodera, K. Himeno, K. Matsui, "Structural evaluation of pavement using surface wave and portable FWD tests", Proc. SPIE 6177, Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems V, 61770L (15 March 2006); doi: 10.1117/12.659530; https://doi.org/10.1117/12.659530

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