Crack detection limits in unit based masonry with terrestrial laser scanning
|Title:||Crack detection limits in unit based masonry with terrestrial laser scanning||Authors:||Laefer, Debra F.
|Permanent link:||http://hdl.handle.net/10197/7446||Date:||Mar-2014||Abstract:||This paper presents the fundamental mathematics to determine the minimum crack width detectable with a terrestrial laser scanner in unit-based masonry. Orthogonal offset, interval scan angle, crack orientation, and crack depth are the main parameters. The theoretical work is benchmarked against laboratory tests using 4 samples with predesigned crack widths of 1–7 mm scanned at orthogonal distances of 5.0–12.5 m and at angles of 0°–30°. Results showed that absolute errors of crack width were mostly less than 1.37 mm when the orthogonal distance varied 5.0–7.5 m but significantly increased for greater distances. The orthogonal distance had a disproportionately negative effect compared to the scan angle.||Funding Details:||European Research Council
Science Foundation Ireland
|Type of material:||Journal Article||Publisher:||Elsevier||Copyright (published version):||2013 Elsevier||Keywords:||Terrestrial laser scanning;Point cloud data;Crack detection;Structural health monitoring;Condition assessment;Masonry||DOI:||10.1016/j.ndteint.2013.11.001||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Earth Institute Research Collection|
Civil Engineering Research Collection
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