Reliability of crack detection for baseline condition assessments

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Show simple item record Laefer, Debra F. Gannon, Jane Deely, Elaine 2010-08-10T13:32:05Z 2010-08-10T13:32:05Z 2010 ASCE en 2010-06
dc.identifier.citation Journal of Infrastructure Systems en
dc.identifier.issn 1076-0342
dc.description.abstract Despite billions of dollars of annual exposure from claims and litigation related to construction-induced damage, there are no quantitatively based, agreed upon standards or procedures as to what constitutes due diligence with respect to a pre-construction, condition assessment. Similarly, the relative accuracy, reliability, and costs for various inspection approaches are not well established. This paper compares the relative performance capabilities of crack detection by sidewalk-based, manual inspection with digital photography, terrestrial Light Detection and Ranging (LiDAR), and elevated manual inspections based on 2 brick and 2 concrete buildings (8.2-14.3m high) in Dublin Ireland. Results showed that non-manual methods tended to over-predict crack widths by at least 5 mm and underestimate crack lengths by one-half. Digital photography, however, detected the shortest cracks (as short as 17 mm) and had no significant decline in accuracy beyond 12m high, which he added benefit of generating a permanent, objective record. Terrestrial LiDAR proved neither particularly accurate nor cost-effective. Finally, operator-based, reliability problems emerged with all methods, with discrepancies of at least 11%. Overall, digital photography taken and archived, but not analyzed, was the most cost-effective, accurate, and reliable approach. en
dc.description.sponsorship Science Foundation Ireland en
dc.format.extent 253447 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher American Society of Civil Engineering (ASCE) en
dc.relation.requires Critical Infrastructure Group Research Collection en
dc.relation.requires Urban Institute Ireland Research Collection en
dc.subject Bricks en
dc.subject Cracking en
dc.subject Defects en
dc.subject Digital techniques en
dc.subject Field investigations en
dc.subject Masonry en
dc.subject Non-destructive tests en
dc.subject Imaging techniques en
dc.subject Site evaluation en
dc.subject.lcsh Building inspection--Standards en
dc.subject.lcsh Building--Accidents--Investigation en
dc.subject.lcsh Imaging systems en
dc.subject.lcsh Surveying--Methodology--Evaluation en
dc.title Reliability of crack detection for baseline condition assessments en
dc.title.alternative Reliability of crack detection for baseline, pre-construction condition assessments en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions en
dc.status Peer reviewed en
dc.identifier.volume 16 en
dc.identifier.issue 2 en
dc.identifier.startpage 129 en
dc.identifier.endpage 137 en
dc.identifier.doi 10.1061/(ASCE)1076-0342(2010)16:2(129)
dc.neeo.contributor Laefer|Debra F.|aut| en
dc.neeo.contributor Gannon|Jane|aut| en
dc.neeo.contributor Deely|Elaine|aut| en
dc.description.admin Must link to the publisher version - DG 02/07/10 au, ti, ke - AL 23/07/2010 en

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