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標題: Evaluation of simulated transfer functions of concrete plate derived by impact-echo method
作者: Cheng, C.C.
Lin, Y.C.
Hsiao, C.M.
Chang, H.C.
關鍵字: impact-echo;concrete;nondestructive tests;stress waves
Project: Ndt & E International
期刊/報告no:: Ndt & E International, Volume 40, Issue 3, Page(s) 239-249.
In this study, the simulated transfer function of a concrete plate was obtained solely from displacement waveform in an impact-echo test. In the simulated transfer function, the amplitude corresponding to the modal vibration at thickness direction, called the thickness-amplitude, can be consistent during various tests on the same location. An empirical formula was obtained by numerical simulation to predict the thickness-amplitude for given thickness, impact-receiver distance, and P-wave speed. The formula was confirmed experimentally using plates made from various mixed materials with various thicknesses. The differences between the experimental and predicted thickness-amplitude are mostly within 10%. The formula has the potential for quantitative evaluation of the bond between concrete and the substrate layer. (C) 2006 Elsevier Ltd. All rights reserved.
ISSN: 0963-8695
DOI: 10.1016/j.ndteint.2006.10.001
Appears in Collections:土木工程學系所

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