DC Field | Value | Language |
---|---|---|
dc.contributor.author | Koo, Ki-Young | ko |
dc.contributor.author | Lee, Jong-Jae | ko |
dc.contributor.author | Yun, Chung Bang | ko |
dc.contributor.author | , Jeong-Tae | ko |
dc.date.accessioned | 2009-12-01T08:28:10Z | - |
dc.date.available | 2009-12-01T08:28:10Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2008-09 | - |
dc.identifier.citation | SMART STRUCTURES AND SYSTEMS, v.4, no.5, pp.605 - 628 | - |
dc.identifier.issn | 1738-1584 | - |
dc.identifier.uri | http://hdl.handle.net/10203/13834 | - |
dc.description.abstract | In bridge structures, damage may induce an additional deflection which may naturally contain essential information about the damage. However, inverse mapping from the damage-induced deflection to the actual damage location and severity is generally complex, particularly for statically indeterminate systems. In this paper, a new load concept, called the positive-bending-inspection-load (PBIL) is proposed to construct a simple inverse mapping from the damage-induced deflection to the actual damage location. A PBIL for an inspection region is defined as a load or a system of loads which guarantees the bending moment to be positive in the inspection region. From the theoretical investigations, it was proven that the damage-induced chord-wise deflection (DI-CD) has the maximum value with the abrupt change in its slope at the damage location under a PBIL. Hence, a novel damage localization method is proposed based on the DI-CD under a PBIL. The procedure may be summarized as: (1) identification of the modal flexibility matrices from acceleration measurements, (2) design for a PBIL for an inspection region of interest in a structure, (3) calculation of the chord-wise deflections for the PBIL using the modal flexibility matrices, and (4) damage localization by finding the location with the maximum DI-CD with die abrupt change in its slope within the inspection region. Procedures from (2)-(4) can be repeated for several inspection regions to cover the whole structure complementarily. Numerical verification studies were carried out on a simply supported beam and a three-span continuous beam model. Experimental verification study was also carried out on a two-span continuous beam structure with a steel box-girder. It was found that the proposed method can identify the damage existence and damage location for small damage cases with narrow cuts at the bottom flange. | - |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | TECHNO-PRESS | - |
dc.subject | IDENTIFICATION | - |
dc.subject | LOCALIZATION | - |
dc.subject | BRIDGE | - |
dc.title | Damage detection in beam-like structures using deflections obtained by modal flexibility matrices | - |
dc.type | Article | - |
dc.identifier.wosid | 000258110800007 | - |
dc.identifier.scopusid | 2-s2.0-84861536062 | - |
dc.type.rims | ART | - |
dc.citation.volume | 4 | - |
dc.citation.issue | 5 | - |
dc.citation.beginningpage | 605 | - |
dc.citation.endingpage | 628 | - |
dc.citation.publicationname | SMART STRUCTURES AND SYSTEMS | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Yun, Chung Bang | - |
dc.contributor.nonIdAuthor | Lee, Jong-Jae | - |
dc.contributor.nonIdAuthor | , Jeong-Tae | - |
dc.type.journalArticle | Article; Proceedings Paper | - |
dc.subject.keywordAuthor | beam-like structures | - |
dc.subject.keywordAuthor | deflection-based damage detection | - |
dc.subject.keywordAuthor | modal flexibility | - |
dc.subject.keywordAuthor | positive bending loads | - |
dc.subject.keywordAuthor | outlier analysis | - |
dc.subject.keywordAuthor | measurement noise | - |
dc.subject.keywordAuthor | experiments | - |
dc.subject.keywordPlus | IDENTIFICATION | - |
dc.subject.keywordPlus | LOCALIZATION | - |
dc.subject.keywordPlus | BRIDGE | - |
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