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標題: | Evaluating bond quality at steel/concrete interfaces using the normalized impact-echo spectrum | 作者: | Lin, Y.C. 林宜清 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. | 摘要: | 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. |
URI: | http://hdl.handle.net/11455/43055 | ISSN: | 0217-9849 | DOI: | 10.1142/s0217984908015747 |
Appears in Collections: | 土木工程學系所 |
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