Documents disponibles écrits par cet auteur

Adaptive quadratic sum-squares error for structural damage identification / Yang, Jann N. in Journal of engineering mechanics, Vol. 135 N°2 (Février 2009) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 135 N°2 (Février 2009) . - pp. 67-77 Titre : Adaptive quadratic sum-squares error for structural damage identification Type de document : texte imprimé Auteurs : Yang, Jann N., Auteur ; Hongwei Huang, Auteur ; Shuwen Pan, Auteur Article en page(s) : pp. 67-77 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Structural  behavior  Errors  Tracking  Damage. Résumé : The ability to detect damages online, based on vibration data measured from sensors, will ensure the reliability and safety of structures. Innovative data analysis techniques for the damage detection of structures have received considerable attention recently, although the problem is quite challenging. In this paper, we proposed a new data analysis method, referred to as the quadratic sum-squares error (QSSE) approach, for the online or almost online identification of structural parameters. Analytical recursive solution for the proposed QSSE method, which is not available in the previous literature, is derived and presented. Further, an adaptive tracking technique recently proposed is implemented in the proposed QSSE approach to identify the time-varying system parameters of the structure, referred to as the adaptive quadratic sum-squares error. The accuracy and effectiveness of the proposed approach are demonstrated using both linear and nonlinear structures. Simulation results using the finite-element models demonstrate that the proposed approach is capable of tracking the changes of structural parameters leading to the identification of structural damages DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...] [article] Adaptive quadratic sum-squares error for structural damage identification [texte imprimé] / Yang, Jann N., Auteur ; Hongwei Huang, Auteur ; Shuwen Pan, Auteur . - pp. 67-77. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 135 N°2 (Février 2009) . - pp. 67-77 Mots-clés : Structural  behavior  Errors  Tracking  Damage. Résumé : The ability to detect damages online, based on vibration data measured from sensors, will ensure the reliability and safety of structures. Innovative data analysis techniques for the damage detection of structures have received considerable attention recently, although the problem is quite challenging. In this paper, we proposed a new data analysis method, referred to as the quadratic sum-squares error (QSSE) approach, for the online or almost online identification of structural parameters. Analytical recursive solution for the proposed QSSE method, which is not available in the previous literature, is derived and presented. Further, an adaptive tracking technique recently proposed is implemented in the proposed QSSE approach to identify the time-varying system parameters of the structure, referred to as the adaptive quadratic sum-squares error. The accuracy and effectiveness of the proposed approach are demonstrated using both linear and nonlinear structures. Simulation results using the finite-element models demonstrate that the proposed approach is capable of tracking the changes of structural parameters leading to the identification of structural damages DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...]

Quantitative risk assessment of cut-slope projects under construction / Zhihong Li in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 12 (Décembre 2010) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 12 (Décembre 2010) . - pp. 1644-1654 Titre : Quantitative risk assessment of cut-slope projects under construction Type de document : texte imprimé Auteurs : Zhihong Li, Auteur ; Hongwei Huang, Auteur ; Farrokh Nadim, Auteur Année de publication : 2011 Article en page(s) : pp. 1644-1654 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Quantitative  analysis  Assessment  Risk  management  Landslides  Construction Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : In some cut-slope projects landslide is a common problem during construction due to unfavorable geomorphological and geomechanical conditions. It is necessary to do a quantitative assessment of the risk posed by landslide before determining the budget or tender price. This paper outlines a general procedure for doing this, followed by an example to demonstrate the approach in comparison to a known failure. Finite-element analyses identify the most dangerous landslide scenario among all construction steps. The slope failure probability is then estimated using reliability theory based on the most dangerous construction step. After identifying the potential failure surface and estimating the volume of the sliding mass, the runnout behavior of sliding mass is simulated to delimit the extent of likely impacted area. Then, the exposed elements at risk and their vulnerabilities are identified and analyzed. The landslide risk is assessed quantitatively for three types of consequences: casualties, economic loss, and time overrun. Compared with actual consequences, the estimation results were in acceptable agreement with the case study. The paper demonstrates that it is feasible to analyze the risk associated with landslides during construction of cut-slopes. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i12/p1644_s1?isAuthorized=no [article] Quantitative risk assessment of cut-slope projects under construction [texte imprimé] / Zhihong Li, Auteur ; Hongwei Huang, Auteur ; Farrokh Nadim, Auteur . - 2011 . - pp. 1644-1654. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 12 (Décembre 2010) . - pp. 1644-1654 Mots-clés : Quantitative  analysis  Assessment  Risk  management  Landslides  Construction Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : In some cut-slope projects landslide is a common problem during construction due to unfavorable geomorphological and geomechanical conditions. It is necessary to do a quantitative assessment of the risk posed by landslide before determining the budget or tender price. This paper outlines a general procedure for doing this, followed by an example to demonstrate the approach in comparison to a known failure. Finite-element analyses identify the most dangerous landslide scenario among all construction steps. The slope failure probability is then estimated using reliability theory based on the most dangerous construction step. After identifying the potential failure surface and estimating the volume of the sliding mass, the runnout behavior of sliding mass is simulated to delimit the extent of likely impacted area. Then, the exposed elements at risk and their vulnerabilities are identified and analyzed. The landslide risk is assessed quantitatively for three types of consequences: casualties, economic loss, and time overrun. Compared with actual consequences, the estimation results were in acceptable agreement with the case study. The paper demonstrates that it is feasible to analyze the risk associated with landslides during construction of cut-slopes. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i12/p1644_s1?isAuthorized=no