Documents disponibles écrits par cet auteur

Dynamic analysis of three-dimensional frames with material and geometric nonlinearities / M. Schachter in Journal of structural engineering, Vol. 137 N° 2 (Fevrier 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 2 (Fevrier 2011) . - pp. 207-219 Titre : Dynamic analysis of three-dimensional frames with material and geometric nonlinearities Type de document : texte imprimé Auteurs : M. Schachter, Auteur ; Reinhorn, A. M., Auteur Année de publication : 2011 Article en page(s) : pp. 207-219 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Dynamic  analysis  Material  nonlinearities  Geometric  nonlinearities  Corotational  approach  State  space  approach Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The dynamic analysis of inelastic structures with geometric nonlinearities experiencing large deformations and buckling is challenging, in particular, if three-dimensional space effects are considered. This paper introduces a new formulation of a three-dimensional beam-column element and the associated analysis of the global frame system using a corotational approach formulated in the state space. The corotational approach may allow uncoupling of the local large deformations and inelastic buckling of the element from the large deformation of the global system. Shaking table testing performed by the authors on a steel frame model structure provides benchmark information for comparison with the proposed analytical formulation. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i2/p207_s1?isAuthorized=no [article] Dynamic analysis of three-dimensional frames with material and geometric nonlinearities [texte imprimé] / M. Schachter, Auteur ; Reinhorn, A. M., Auteur . - 2011 . - pp. 207-219. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 2 (Fevrier 2011) . - pp. 207-219 Mots-clés : Dynamic  analysis  Material  nonlinearities  Geometric  nonlinearities  Corotational  approach  State  space  approach Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The dynamic analysis of inelastic structures with geometric nonlinearities experiencing large deformations and buckling is challenging, in particular, if three-dimensional space effects are considered. This paper introduces a new formulation of a three-dimensional beam-column element and the associated analysis of the global frame system using a corotational approach formulated in the state space. The corotational approach may allow uncoupling of the local large deformations and inelastic buckling of the element from the large deformation of the global system. Shaking table testing performed by the authors on a steel frame model structure provides benchmark information for comparison with the proposed analytical formulation. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i2/p207_s1?isAuthorized=no

Fragility analysis and seismic record selection / G. P. Cimellaro in Journal of structural engineering, Vol. 137 N° 3 (Mars 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 3 (Mars 2011) . - pp. 379-390 Titre : Fragility analysis and seismic record selection Type de document : texte imprimé Auteurs : G. P. Cimellaro, Auteur ; Reinhorn, A. M., Auteur ; A. D’Ambrisi, Auteur Année de publication : 2011 Article en page(s) : pp. 379-390 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Damage  Fragility  functions  Intensity  measure  Nonlinear  analysis  Record  selection  Uniform  hazard  spectrum  Spectrum  matching  Stationary  simulation  Synthetic  earthquakes  Acceleration  scaling  Accelerograms  matching  Inelastic  demand Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper explores the influence of spectrum-matched and amplitude-scaled ground motions on the development of fragility functions for structures. The quantification of the influence of these two types of ensembles on ground motions in predicting demands of structural and nonstructural systems is addressed. Moreover, the paper investigates the sensitivity of number of accelerograms in the ensembles, which produces consistent results in the nonlinear analyses. A multidegree-of-freedom (MDOF) inelastic shear-type building is used in the evaluations. The median and the dispersion of different types of damage measures are evaluated at each story and the effect of different levels of nonlinearity is investigated. Fragility functions are developed for structural and nonstructural components using the maximum likelihood method from the response generated with the selected ground motions. The sufficient number of ground motions necessary in the estimation of the response parameters and on the evaluation of the fragility functions is presented herein. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i3/p379_s1?isAuthorized=no [article] Fragility analysis and seismic record selection [texte imprimé] / G. P. Cimellaro, Auteur ; Reinhorn, A. M., Auteur ; A. D’Ambrisi, Auteur . - 2011 . - pp. 379-390. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 3 (Mars 2011) . - pp. 379-390 Mots-clés : Damage  Fragility  functions  Intensity  measure  Nonlinear  analysis  Record  selection  Uniform  hazard  spectrum  Spectrum  matching  Stationary  simulation  Synthetic  earthquakes  Acceleration  scaling  Accelerograms  matching  Inelastic  demand Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper explores the influence of spectrum-matched and amplitude-scaled ground motions on the development of fragility functions for structures. The quantification of the influence of these two types of ensembles on ground motions in predicting demands of structural and nonstructural systems is addressed. Moreover, the paper investigates the sensitivity of number of accelerograms in the ensembles, which produces consistent results in the nonlinear analyses. A multidegree-of-freedom (MDOF) inelastic shear-type building is used in the evaluations. The median and the dispersion of different types of damage measures are evaluated at each story and the effect of different levels of nonlinearity is investigated. Fragility functions are developed for structural and nonstructural components using the maximum likelihood method from the response generated with the selected ground motions. The sufficient number of ground motions necessary in the estimation of the response parameters and on the evaluation of the fragility functions is presented herein. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i3/p379_s1?isAuthorized=no

Progressive collapse analysis through strength degradation and fracture in the mixed lagrangian formulation / Lavan, O. in Earthquake engineering structural dynamics, Vol. 38 N° 13 (Octobre 2009) 

Public ISBD [article]  in Earthquake engineering structural dynamics > Vol. 38 N° 13 (Octobre 2009) . - pp. 1483-1504 Titre : Progressive collapse analysis through strength degradation and fracture in the mixed lagrangian formulation Type de document : texte imprimé Auteurs : Lavan, O., Auteur ; Sivaselvan, M. V., Auteur ; Reinhorn, A. M., Auteur ; Dargush, G. F. Article en page(s) : pp. 1483-1504 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Nonlinear  structural  dynamics;  fracture;  Deterioration;  Mixed  Lagrangian  Formulation;  Mixed  variational  method Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The dynamic analysis of progressive collapse faces a great number of obstacles that often lead to the collapse of the analysis prior to the actual analysis of collapse. Hence, the Mixed Lagrangian Formulation that has been shown to be very robust was adopted as a framework to accommodate such analysis. By modifying the loading function and the numerical scheme, the capabilities of this framework were extended to account for strength degradation and fracture, while some insight to its behavior is introduced as well. The examples presented show a very robust and stable behavior of the numerical scheme in terms of the time step size required, even in cases where a sudden fracture takes place. ISSN : 0098-8847 En ligne : www.interscience.wiley.com/journal/eqe [article] Progressive collapse analysis through strength degradation and fracture in the mixed lagrangian formulation [texte imprimé] / Lavan, O., Auteur ; Sivaselvan, M. V., Auteur ; Reinhorn, A. M., Auteur ; Dargush, G. F. . - pp. 1483-1504. Génie Civil Langues : Anglais (eng) in Earthquake engineering structural dynamics > Vol. 38 N° 13 (Octobre 2009) . - pp. 1483-1504 Mots-clés : Nonlinear  structural  dynamics;  fracture;  Deterioration;  Mixed  Lagrangian  Formulation;  Mixed  variational  method Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The dynamic analysis of progressive collapse faces a great number of obstacles that often lead to the collapse of the analysis prior to the actual analysis of collapse. Hence, the Mixed Lagrangian Formulation that has been shown to be very robust was adopted as a framework to accommodate such analysis. By modifying the loading function and the numerical scheme, the capabilities of this framework were extended to account for strength degradation and fracture, while some insight to its behavior is introduced as well. The examples presented show a very robust and stable behavior of the numerical scheme in terms of the time step size required, even in cases where a sudden fracture takes place. ISSN : 0098-8847 En ligne : www.interscience.wiley.com/journal/eqe