Documents disponibles écrits par cet auteur

Effect of spandrel beam to double tee connection characteristic on flexure-controlled precast diaphragms / G. Wan in Journal of structural engineering, Vol. 138 N° 2 (Fevrier 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 2 (Fevrier 2012) . - pp. 247-257 Titre : Effect of spandrel beam to double tee connection characteristic on flexure-controlled precast diaphragms Type de document : texte imprimé Auteurs : G. Wan, Auteur ; R. B. Fleischman, Auteur ; D. Zhang, Auteur Année de publication : 2012 Article en page(s) : pp. 247-257 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Floor  diaphragms  Precast  concrete  Spandrel  beams  Seismic  design Résumé : Precast spandrel beams are often used on the perimeter of precast buildings to support the precast floor units. These elements are typically not considered part of the lateral force resisting system. However, the presence of the spandrel beams in the floor system may modify the strength, stiffness, and deformation capacity of the precast floor diaphragm. The nature of this response is highly dependent on the characteristics of the details connecting the spandrel to the precast floor system. These details are often welded connections used primarily for erection stability and designed without diaphragm action in mind. With emerging design methodologies for precast diaphragms requiring better-defined performance, the impact of the spandrel beams must be accounted for. Accordingly, analytical research is presented here that examines the effect of spandrel-beam-connecting details on the global characteristics and local demands of a flexure-controlled precast floor diaphragm. Design recommendations are provided. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v138/i2/p247_s1?isAuthorized=no [article] Effect of spandrel beam to double tee connection characteristic on flexure-controlled precast diaphragms [texte imprimé] / G. Wan, Auteur ; R. B. Fleischman, Auteur ; D. Zhang, Auteur . - 2012 . - pp. 247-257. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 2 (Fevrier 2012) . - pp. 247-257 Mots-clés : Floor  diaphragms  Precast  concrete  Spandrel  beams  Seismic  design Résumé : Precast spandrel beams are often used on the perimeter of precast buildings to support the precast floor units. These elements are typically not considered part of the lateral force resisting system. However, the presence of the spandrel beams in the floor system may modify the strength, stiffness, and deformation capacity of the precast floor diaphragm. The nature of this response is highly dependent on the characteristics of the details connecting the spandrel to the precast floor system. These details are often welded connections used primarily for erection stability and designed without diaphragm action in mind. With emerging design methodologies for precast diaphragms requiring better-defined performance, the impact of the spandrel beams must be accounted for. Accordingly, analytical research is presented here that examines the effect of spandrel-beam-connecting details on the global characteristics and local demands of a flexure-controlled precast floor diaphragm. Design recommendations are provided. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v138/i2/p247_s1?isAuthorized=no

Experimental evaluation of pretopped precast diaphragm critical flexure joint under seismic demands / D. Zhang in Journal of structural engineering, Vol. 137 N° 10 (Octobre 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 10 (Octobre 2011) . - pp. 1063-1074 Titre : Experimental evaluation of pretopped precast diaphragm critical flexure joint under seismic demands Type de document : texte imprimé Auteurs : D. Zhang, Auteur ; R. B. Fleischman, Auteur ; C. J. Naito, Auteur Année de publication : 2012 Article en page(s) : pp. 1063-1074 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Diaphragms  Concrete  Precast  Seismic  design  Tests Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Precast concrete diaphragm seismic response is examined in experimental research integrating model-based simulation with physical testing. The experimental substructure is the diaphragm critical flexural region of a prototype precast parking structure. This region is expected to undergo significant inelastic flexural deformation, while potentially nonductile regions remain elastic on the basis of capacity design rules from an emerging design methodology. The physical test is conducted at half-scale. The test specimen is detailed using diaphragm reinforcement intended to meet deformability requirements. Predetermined displacement histories are applied to the test specimen on the basis of nonlinear transient dynamic analyses of the prototype structure. The loading history is applied by a test fixture capable of simultaneously providing shear, axial, and moment to the joint. Moment strength, stiffness, rotational deformation capacity, and progressive damage are examined under a sequence of increasing intensity earthquakes. Design recommendations are provided. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i10/p1063_s1?isAuthorized=no [article] Experimental evaluation of pretopped precast diaphragm critical flexure joint under seismic demands [texte imprimé] / D. Zhang, Auteur ; R. B. Fleischman, Auteur ; C. J. Naito, Auteur . - 2012 . - pp. 1063-1074. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 10 (Octobre 2011) . - pp. 1063-1074 Mots-clés : Diaphragms  Concrete  Precast  Seismic  design  Tests Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Precast concrete diaphragm seismic response is examined in experimental research integrating model-based simulation with physical testing. The experimental substructure is the diaphragm critical flexural region of a prototype precast parking structure. This region is expected to undergo significant inelastic flexural deformation, while potentially nonductile regions remain elastic on the basis of capacity design rules from an emerging design methodology. The physical test is conducted at half-scale. The test specimen is detailed using diaphragm reinforcement intended to meet deformability requirements. Predetermined displacement histories are applied to the test specimen on the basis of nonlinear transient dynamic analyses of the prototype structure. The loading history is applied by a test fixture capable of simultaneously providing shear, axial, and moment to the joint. Moment strength, stiffness, rotational deformation capacity, and progressive damage are examined under a sequence of increasing intensity earthquakes. Design recommendations are provided. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i10/p1063_s1?isAuthorized=no