{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,8,17]],"date-time":"2024-08-17T05:12:33Z","timestamp":1723871553402},"reference-count":32,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2008,5,1]],"date-time":"2008-05-01T00:00:00Z","timestamp":1209600000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Computer aided Civil Eng"],"published-print":{"date-parts":[[2008,7]]},"abstract":"Abstract:\u2003<\/jats:bold> Fiber\u2010reinforced polymer (FRP) composite materials have been widely used for retrofitting civil infrastructure systems. The ultimate goal of this study was to develop an in\u2010site non\u2010destructive testing (NDT) technique that can continuously and autonomously inspect the bonding condition between a carbon FRP (CFRP) layer and a host reinforced concrete (RC) structure, when the CRFP layer is used for strengthening the RC structure. The uniqueness of this reference\u2010free NDT is two\u2010fold: First, features, which are sensitive to CFRP debonding but insensitive to operational and environmental variations of the structure, have been extracted only from current data without direct comparison with previously obtained baseline data. Second, damage classification is performed instantaneously without relying on predetermined decision boundaries. The extraction of the reference\u2010free features is accomplished based on the concept of time reversal acoustics, and the instantaneous decision\u2010making is achieved using cluster analysis. Monotonic and fatigue load tests of large\u2010scale CFRP\u2010strengthened RC beams are conducted to demonstrate the potential of the proposed reference\u2010free debonding monitoring technique. Based on the experimental studies, it has been shown that the proposed reference\u2010free NDT technique may minimize false alarms of debonding and unnecessary data interpretation by end users.<\/jats:italic> <\/jats:p>","DOI":"10.1111\/j.1467-8667.2008.00541.x","type":"journal-article","created":{"date-parts":[[2008,5,1]],"date-time":"2008-05-01T14:39:32Z","timestamp":1209652772000},"page":"324-338","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":40,"title":["Reference\u2010Free Damage Classification Based on Cluster Analysis"],"prefix":"10.1111","volume":"23","author":[{"given":"Hoon","family":"Sohn","sequence":"first","affiliation":[]},{"given":"Seung Dae","family":"Kim","sequence":"additional","affiliation":[]},{"given":"Kent","family":"Harries","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2008,5]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1061\/(ASCE)0899-1561(2004)16:6(540)"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10683-007-9168-y"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1088\/0964-1726\/14\/3\/001"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1121\/1.420094"},{"key":"e_1_2_8_6_1","volume-title":"Proceedings of the 16th World Conference on Nondestructive Testing","author":"Ekenel M.","year":"2004"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1061\/(ASCE)0733-9399(2002)128:2(172)"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1038\/scientificamerican1199-91"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1088\/0266-5611\/17\/1\/201"},{"key":"e_1_2_8_10_1","volume-title":"16th World Conference on Nondestructive Testing","author":"Fonda J.","year":"2004"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.7551\/mitpress\/4931.001.0001"},{"key":"e_1_2_8_12_1","volume-title":"Micromechatronics: Modeling, Analysis, and Design with MATLAB","author":"Giurgiutiu V.","year":"2004"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11803-003-0005-9"},{"key":"e_1_2_8_14_1","unstructured":"Harries K. 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