Détail de l'auteur
Auteur Q. S. Li |
Documents disponibles écrits par cet auteur (3)



Dynamic behavior of taipei 101 tower: field measurement and numerical analysis / Q. S. Li in Journal of structural engineering, Vol. 137 N° 1 (Janvier 2011)
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[article]
Titre : Dynamic behavior of taipei 101 tower: field measurement and numerical analysis Type de document : texte imprimé Auteurs : Q. S. Li, Auteur ; Lun-Hai Zhi, Auteur ; Alex Y. Tuan, Auteur Année de publication : 2011 Article en page(s) : pp. 143-155 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Tall building Wind effect Seismic Dynamic characteristics Finite-element method Full-scale measurement Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents selected results measured from a monitoring system with 30 accelerometers installed at six floor levels in 508-m high Taipei 101 Tower located in Taipei City, Taiwan where earthquakes and strong typhoons are common occurrences. Emphasis is placed on analyzing the data recorded during three typhoons (Matsa, Talim, and Krosa) and a seismic event (Wenchuan earthquake occurred on May 12, 2008 in Shichuan, China) to investigate the effects of wind and seismic on the supertall building. Dynamic characteristics of the tall building such as natural frequencies, mode shapes, and damping ratios determined from the measured data are presented and compared with those calculated from the finite-element model of the high-rise structure. The seismic performance of this supertall building to a long distance earthquake (Wenchuan earthquake) is assessed based on the field measurements and numerical analysis. The findings of this study are expected to be of considerable interest and practical use to professionals and researchers involved in the design of supertall buildings.
DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i1/p143_s1?isAuthorized=no
in Journal of structural engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 143-155[article] Dynamic behavior of taipei 101 tower: field measurement and numerical analysis [texte imprimé] / Q. S. Li, Auteur ; Lun-Hai Zhi, Auteur ; Alex Y. Tuan, Auteur . - 2011 . - pp. 143-155.
Génie Civil
Langues : Anglais (eng)
in Journal of structural engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 143-155
Mots-clés : Tall building Wind effect Seismic Dynamic characteristics Finite-element method Full-scale measurement Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents selected results measured from a monitoring system with 30 accelerometers installed at six floor levels in 508-m high Taipei 101 Tower located in Taipei City, Taiwan where earthquakes and strong typhoons are common occurrences. Emphasis is placed on analyzing the data recorded during three typhoons (Matsa, Talim, and Krosa) and a seismic event (Wenchuan earthquake occurred on May 12, 2008 in Shichuan, China) to investigate the effects of wind and seismic on the supertall building. Dynamic characteristics of the tall building such as natural frequencies, mode shapes, and damping ratios determined from the measured data are presented and compared with those calculated from the finite-element model of the high-rise structure. The seismic performance of this supertall building to a long distance earthquake (Wenchuan earthquake) is assessed based on the field measurements and numerical analysis. The findings of this study are expected to be of considerable interest and practical use to professionals and researchers involved in the design of supertall buildings.
DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i1/p143_s1?isAuthorized=no Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Large eddy simulations of wind-driven rain on tall building facades / S. H. Huang in Journal of structural engineering, Vol. 138 N° 8 (Août 2012)
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[article]
Titre : Large eddy simulations of wind-driven rain on tall building facades Type de document : texte imprimé Auteurs : S. H. Huang, Auteur ; Q. S. Li, Auteur Année de publication : 2012 Article en page(s) : pp.967–983. Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Wind-driven rain Computational fluid dynamics Large eddy simulation Tall building Multiphase flow Numerical Résumé : Wind-driven rain (WDR) on building facades may lead to water penetration, cladding damage, structural cracking, etc., which affect the durability of the claddings. This study aims to develop a numerical approach to the evaluation of WDR on tall building envelopes based on large eddy simulations (LESs) and a Eulerian multiphase model. The present method utilizes the concept of the multiphase model to deal with rain and wind, and both wind and rain motions as well as their interactions are treated under the Euler frame, which can significantly reduce the complexity in evaluations of WDR and simplify boundary condition treatments. Besides these advantages, unsteady-state WDR information such as the transient catch ratio of WDR, the spatial and temporal distributions of rain intensity, etc., can be predicted by the LES. A validation study shows that the simulation results agree well with the available experimental data, verifying the accuracy of the simulation approach based on the Eulerian multiphase model and LES. Furthermore, a LES of WDR on the 508-m-high Taipei 101 Tower was performed to illustrate the application of the present method and to investigate WDR on a tall building. Both the transient and time-averaged WDR results are presented and discussed, demonstrating that the present approach can provide more information on WDR than the existing methods.
ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000516
in Journal of structural engineering > Vol. 138 N° 8 (Août 2012) . - pp.967–983.[article] Large eddy simulations of wind-driven rain on tall building facades [texte imprimé] / S. H. Huang, Auteur ; Q. S. Li, Auteur . - 2012 . - pp.967–983.
Génie civil
Langues : Anglais (eng)
in Journal of structural engineering > Vol. 138 N° 8 (Août 2012) . - pp.967–983.
Mots-clés : Wind-driven rain Computational fluid dynamics Large eddy simulation Tall building Multiphase flow Numerical Résumé : Wind-driven rain (WDR) on building facades may lead to water penetration, cladding damage, structural cracking, etc., which affect the durability of the claddings. This study aims to develop a numerical approach to the evaluation of WDR on tall building envelopes based on large eddy simulations (LESs) and a Eulerian multiphase model. The present method utilizes the concept of the multiphase model to deal with rain and wind, and both wind and rain motions as well as their interactions are treated under the Euler frame, which can significantly reduce the complexity in evaluations of WDR and simplify boundary condition treatments. Besides these advantages, unsteady-state WDR information such as the transient catch ratio of WDR, the spatial and temporal distributions of rain intensity, etc., can be predicted by the LES. A validation study shows that the simulation results agree well with the available experimental data, verifying the accuracy of the simulation approach based on the Eulerian multiphase model and LES. Furthermore, a LES of WDR on the 508-m-high Taipei 101 Tower was performed to illustrate the application of the present method and to investigate WDR on a tall building. Both the transient and time-averaged WDR results are presented and discussed, demonstrating that the present approach can provide more information on WDR than the existing methods.
ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000516 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Moving Least-Squares Differential Quadrature Method for Free Vibration of Antisymmetric Laminates / Q. S. Li in Journal of engineering mechanics, Vol. 130 N°12 (Decembre 2004)
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[article]
Titre : Moving Least-Squares Differential Quadrature Method for Free Vibration of Antisymmetric Laminates Titre original : La Méthode Différentielle des Moindres Carrés Mobile de Quadrature pour la Vibration Libre d'Antisymmétrique Stratifie Type de document : texte imprimé Auteurs : Q. S. Li, Auteur ; Huang, Y. Q., Auteur Année de publication : 2006 Article en page(s) : 1447-1457 p. Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Vibration Numerical analysis Composite structures Laminates Differential equations Analyse numérique Structures composées Stratifie Equations différentielles Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : In this paper, the moving least-squares differential quadrature (MLSDQ) method is employed for free vibration of thick antisymmetric laminates based on the first-order shear deformation theory. The generalized displacements of the laminates are independently approximated with the centered moving least-squares (MLS) technique within each domain of influence. The MLS nodal shape functions and their partial derivatives are computed quickly through back-substitutions after only one LU decomposition. Subsequently, the weighting coefficients in the MLSDQ discretization are determined with the nodal partial derivatives of the MLS shape functions. The MLSDQ method combines the merits of both the differential quadrature and meshless methods which can be conveniently applied to complex domains and irregular discretizations without loss of implementation efficiency and numerical accuracy. The natural frequencies of the laminates with various edge conditions, ply angles, and shapes are calculated and compared with the existing solutions to study the numerical accuracy and stability of the MLSDQ method. Effects of support size, order of completeness of basis functions, and node irregularity on the numerical accuracy are investigated in detail.
En cet article, la méthode différentielle des moindres carrés mobile de la quadrature (MLSDQ) est utilisée pour la vibration libre d'antisymmétrique épais stratifie basé sur la première théorie de déformation de cisaillement d'ordre. Les déplacements généralisés du stratifie sont indépendamment rapprochés avec la technique (MLS) des moindres carrés en mouvement centrée dans chaque domaine d'influence. Les fonctions nodales de forme de MLS et leurs dérivés partiels sont calculés rapidement par les substitutions arrières après seulement une décomposition de LU. Plus tard, les coefficients de pondération dans la discrétisation de MLSDQ sont déterminés avec les dérivés partiels nodaux des fonctions de forme de MLS. La méthode de MLSDQ combine les mérites de la quadrature différentielle et engrène moins de méthodes qui peuvent être commodément appliquées aux domaines complexes et aux discrétisations irrégulières sans perte d'efficacité d'exécution et d'exactitude numérique. Les fréquences normales du stratifie avec de divers états de bord, le pli pêche, et des formes sont calculées et comparées aux solutions existantes pour étudier l'exactitude et la stabilité numériques de la méthode de MLSDQ. Des effets de la taille de soutien, l'ordre de la perfection des fonctions de base, et l'irrégularité de noeud sur l'exactitude numérique sont étudiés en détail.
DEWEY : 620.1 ISSN : 0733-9399 En ligne : bcqsli@cityu.edu.hk
in Journal of engineering mechanics > Vol. 130 N°12 (Decembre 2004) . - 1447-1457 p.[article] Moving Least-Squares Differential Quadrature Method for Free Vibration of Antisymmetric Laminates = La Méthode Différentielle des Moindres Carrés Mobile de Quadrature pour la Vibration Libre d'Antisymmétrique Stratifie [texte imprimé] / Q. S. Li, Auteur ; Huang, Y. Q., Auteur . - 2006 . - 1447-1457 p.
Génie Mécanique
Langues : Anglais (eng)
in Journal of engineering mechanics > Vol. 130 N°12 (Decembre 2004) . - 1447-1457 p.
Mots-clés : Vibration Numerical analysis Composite structures Laminates Differential equations Analyse numérique Structures composées Stratifie Equations différentielles Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : In this paper, the moving least-squares differential quadrature (MLSDQ) method is employed for free vibration of thick antisymmetric laminates based on the first-order shear deformation theory. The generalized displacements of the laminates are independently approximated with the centered moving least-squares (MLS) technique within each domain of influence. The MLS nodal shape functions and their partial derivatives are computed quickly through back-substitutions after only one LU decomposition. Subsequently, the weighting coefficients in the MLSDQ discretization are determined with the nodal partial derivatives of the MLS shape functions. The MLSDQ method combines the merits of both the differential quadrature and meshless methods which can be conveniently applied to complex domains and irregular discretizations without loss of implementation efficiency and numerical accuracy. The natural frequencies of the laminates with various edge conditions, ply angles, and shapes are calculated and compared with the existing solutions to study the numerical accuracy and stability of the MLSDQ method. Effects of support size, order of completeness of basis functions, and node irregularity on the numerical accuracy are investigated in detail.
En cet article, la méthode différentielle des moindres carrés mobile de la quadrature (MLSDQ) est utilisée pour la vibration libre d'antisymmétrique épais stratifie basé sur la première théorie de déformation de cisaillement d'ordre. Les déplacements généralisés du stratifie sont indépendamment rapprochés avec la technique (MLS) des moindres carrés en mouvement centrée dans chaque domaine d'influence. Les fonctions nodales de forme de MLS et leurs dérivés partiels sont calculés rapidement par les substitutions arrières après seulement une décomposition de LU. Plus tard, les coefficients de pondération dans la discrétisation de MLSDQ sont déterminés avec les dérivés partiels nodaux des fonctions de forme de MLS. La méthode de MLSDQ combine les mérites de la quadrature différentielle et engrène moins de méthodes qui peuvent être commodément appliquées aux domaines complexes et aux discrétisations irrégulières sans perte d'efficacité d'exécution et d'exactitude numérique. Les fréquences normales du stratifie avec de divers états de bord, le pli pêche, et des formes sont calculées et comparées aux solutions existantes pour étudier l'exactitude et la stabilité numériques de la méthode de MLSDQ. Des effets de la taille de soutien, l'ordre de la perfection des fonctions de base, et l'irrégularité de noeud sur l'exactitude numérique sont étudiés en détail.
DEWEY : 620.1 ISSN : 0733-9399 En ligne : bcqsli@cityu.edu.hk Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire