Recently, a new method is proposed to obtain a simulated transfer function of an impact-echo response from the Rayleigh wave recorded in the displacement waveform. In present study, the effects of impactor-receiver distance, impact duration, Poisson ratio, Young's modulus, and wave velocity on the simulated transfer function are thoroughly explored theoretically. The simulated transfer function is examined through numerical and experimental case studies of concrete plate. In both studies, the impactors with various impact-durations as well as various impactor-receiver distances are tested. The results show constant amplitudes due to a plate thickness with low variation for the cases of impact-duration larger than 30 µs. Thus, the thickness amplitude can be a useful index for evaluating the interfacial bonding condition. Finally, a test procedure for further field study is proposed.
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