Documents disponibles écrits par cet auteur

Experimental verification of the flexibility-based damage locating vector method / Y. Gao in Journal of engineering mechanics, Vol. 133 N°10 (Octobre 2007) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 133 N°10 (Octobre 2007) . - pp.1043–1049 Titre : Experimental verification of the flexibility-based damage locating vector method Type de document : texte imprimé Auteurs : Y. Gao, Auteur ; B.F Spencer, Auteur ; Dionisio Bernal, Auteur Année de publication : 2007 Article en page(s) : pp.1043–1049 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Experimentation  Damage  Flexibility  Structural  dynamics  Trusse Résumé : In recent years, numerous approaches have been proposed for detecting damage in structures, in which the flexibility-based damage locating vector (DLV) method is one of the promising techniques. By computing a set of load vectors from the change of the flexibility matrix before and after damage and then applying them as static forces to the undamaged analytical model for static computation, the DLV method is able to locate damage in structures. The main purpose of this paper is to experimentally verify this method. Following a brief introduction and discussion of the motivation for the flexibility-based method, an overview of the DLV method and construction of the flexibility matrix from limited sensor information is presented. The DLV method is then experimentally verified employing a 5.6 m (18 ft)-long three-dimensional truss structure. To simulate damage in the structure, the original truss member is replaced by one with reduced stiffness. Experimental results show that the DLV method can successfully detect the damage using a limited number of sensors and modes. ISSN : 0733-9399 En ligne : http://ascelibrary.org/action/showAbstract?page=1043&volume=133&issue=10&journal [...] [article] Experimental verification of the flexibility-based damage locating vector method [texte imprimé] / Y. Gao, Auteur ; B.F Spencer, Auteur ; Dionisio Bernal, Auteur . - 2007 . - pp.1043–1049. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 133 N°10 (Octobre 2007) . - pp.1043–1049 Mots-clés : Experimentation  Damage  Flexibility  Structural  dynamics  Trusse Résumé : In recent years, numerous approaches have been proposed for detecting damage in structures, in which the flexibility-based damage locating vector (DLV) method is one of the promising techniques. By computing a set of load vectors from the change of the flexibility matrix before and after damage and then applying them as static forces to the undamaged analytical model for static computation, the DLV method is able to locate damage in structures. The main purpose of this paper is to experimentally verify this method. Following a brief introduction and discussion of the motivation for the flexibility-based method, an overview of the DLV method and construction of the flexibility matrix from limited sensor information is presented. The DLV method is then experimentally verified employing a 5.6 m (18 ft)-long three-dimensional truss structure. To simulate damage in the structure, the original truss member is replaced by one with reduced stiffness. Experimental results show that the DLV method can successfully detect the damage using a limited number of sensors and modes. ISSN : 0733-9399 En ligne : http://ascelibrary.org/action/showAbstract?page=1043&volume=133&issue=10&journal [...]

Multimetric sensing for structural damage detection / S. H. Sim in Journal of engineering mechanics, Vol. 137 N° 1 (Janvier 2011) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 137 N° 1 (Janvier 2011) . - pp.22-23 Titre : Multimetric sensing for structural damage detection Type de document : texte imprimé Auteurs : S. H. Sim, Auteur ; B.F Spencer, Auteur ; T. Nagayama, Auteur Année de publication : 2011 Article en page(s) : pp.22-23 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Structural  reliability  Monitoring  Damage  Infrastructure. Résumé : Vibration-based damage detection methods have been widely studied for structural health monitoring of civil infrastructure. Acceleration measurements are frequently employed to extract the dynamic characteristics of the structure and locate damage because they can be obtained conveniently and possess relatively little noise. However, considering the fact that damage is a local phenomenon, the sole use of acceleration measurements that are intrinsically global structural responses limits damage detection capabilities. This paper investigates the possibility of using both global and local measurements to improve the accuracy and robustness of damage detection methods. A multimetric approach based on the damage locating vector method is proposed. Numerical simulations are conducted to verify the efficacy of the proposed approach. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i1/p22_s1?isAuthorized=no [article] Multimetric sensing for structural damage detection [texte imprimé] / S. H. Sim, Auteur ; B.F Spencer, Auteur ; T. Nagayama, Auteur . - 2011 . - pp.22-23. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 137 N° 1 (Janvier 2011) . - pp.22-23 Mots-clés : Structural  reliability  Monitoring  Damage  Infrastructure. Résumé : Vibration-based damage detection methods have been widely studied for structural health monitoring of civil infrastructure. Acceleration measurements are frequently employed to extract the dynamic characteristics of the structure and locate damage because they can be obtained conveniently and possess relatively little noise. However, considering the fact that damage is a local phenomenon, the sole use of acceleration measurements that are intrinsically global structural responses limits damage detection capabilities. This paper investigates the possibility of using both global and local measurements to improve the accuracy and robustness of damage detection methods. A multimetric approach based on the damage locating vector method is proposed. Numerical simulations are conducted to verify the efficacy of the proposed approach. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i1/p22_s1?isAuthorized=no