Multiple-tuned mass dampers for multimodal control of pedestrian bridges / Y. Daniel in Journal of structural engineering, Vol. 138 N° 9 (Septembre 2012)  

Public ISBD [article]  inJournal of structural engineering > Vol. 138 N° 9 (Septembre 2012) . - pp.1173–1178. Titre : Multiple-tuned mass dampers for multimodal control of pedestrian bridges Type de document : texte imprimé Auteurs : Y. Daniel, Auteur ; O. Lavan, Auteur ; R. Levy, Auteur Année de publication : 2012 Article en page(s) : pp.1173–1178. Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Vibration control Tuned mass dampers Dynamic vibration absorbers Pedestrian bridge Fully stressed design Multiple mode Résumé : This paper deals with the allocation and sizing of multiple-tuned mass dampers (MTMDs) in an attempt to retrofit footbridges with multiple critical modes resulting from the excitation of pedestrian traffic. The simple and practical methodology proposed herein includes the use of an iterative analysis/redesign type procedure that converges to a given allowable level of accelerations. An example that uses this methodology to retrofit an existing footbridge is presented. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000527 [article] Multiple-tuned mass dampers for multimodal control of pedestrian bridges [texte imprimé] / Y. Daniel, Auteur ; O. Lavan, Auteur ; R. Levy, Auteur . - 2012 . - pp.1173–1178. Génie civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 9 (Septembre 2012) . - pp.1173–1178. Mots-clés : Vibration control Tuned mass dampers Dynamic vibration absorbers Pedestrian bridge Fully stressed design Multiple mode Résumé : This paper deals with the allocation and sizing of multiple-tuned mass dampers (MTMDs) in an attempt to retrofit footbridges with multiple critical modes resulting from the excitation of pedestrian traffic. The simple and practical methodology proposed herein includes the use of an iterative analysis/redesign type procedure that converges to a given allowable level of accelerations. An example that uses this methodology to retrofit an existing footbridge is presented. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000527

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

Public ISBD [article]  inEarthquake 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 : O. Lavan, Auteur ; Sivaselvan, M. V., Auteur ; A. M. Reinhorn, 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  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] / O. Lavan, Auteur ; Sivaselvan, M. V., Auteur ; A. M. Reinhorn, 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  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

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