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標題: Evaluating bond quality at steel/concrete interfaces using the normalized impact-echo spectrum
作者: Lin, Y.C.
Hsu, K.T.
Cheng, C.C.
Project: Modern Physics Letters B
期刊/報告no:: Modern Physics Letters B, Volume 22, Issue 11, Page(s) 1001-1006.
The objective of this paper is to develop a nondestructive test technique based on stress wave propagation for evaluating the bond quality of concrete structures strengthened by externally bonded steel plates. In this paper, a newly developed technique based on the normalized impact-echo spectrum was used to quantitatively detect the size of air voids at the interfacial epoxy layer between steel plate and concrete. Experimental results show that in the normalized impact-echo spectra, the amplitude of the peak at the frequency corresponding to the wave reflections at the steel/epoxy interface increases with an increase in the air void size. The bond strength decreases with an increase in the peak amplitude due to the increasing size of the flaw.
ISSN: 0217-9849
DOI: 10.1142/s0217984908015747
Appears in Collections:土木工程學系所

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