Documents disponibles écrits par cet auteur

Failure assessment of lightly reinforced floor slabs. I, Experimental investigation / K. A. Cashell in Journal of structural engineering, Vol. 137 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 9 (Septembre 2011) . - pp. 977-988 Titre : Failure assessment of lightly reinforced floor slabs. I, Experimental investigation Type de document : texte imprimé Auteurs : K. A. Cashell, Auteur ; Elghazouli, A. Y., Auteur ; B. A. Izzuddin, Auteur Année de publication : 2011 Article en page(s) : pp. 977-988 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Composite  steel/concrete  Composite  slabs  Lightly  reinforced  members  Failure  conditions  Ductility  Reinforcement  fracture Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper is concerned with the ultimate behavior of lightly reinforced concrete floor slabs under extreme loading conditions. Particular emphasis is given to examining the failure conditions of idealized composite slabs which become lightly reinforced in a fire situation as a result of the early loss of the steel deck. An experimental study is described which focuses on the response of two-way spanning floor slabs with various materials and geometric configurations. The tests enable direct assessment of the influence of a number of key parameters such as the reinforcement type, properties, and ratio on the ultimate response. The results also permit the development of simplified expressions that capture the influence of salient factors such as bond characteristics and reinforcement properties for predicting the ductility of lightly reinforced floor slabs. The companion paper complements the experimental observations with detailed numerical assessments of the ultimate response and proposes analytical models that predict failure of slab members by either reinforcement fracture or compressive crushing of concrete. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i9/p977_s1?bypassSSO=1 [article] Failure assessment of lightly reinforced floor slabs. I, Experimental investigation [texte imprimé] / K. A. Cashell, Auteur ; Elghazouli, A. Y., Auteur ; B. A. Izzuddin, Auteur . - 2011 . - pp. 977-988. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 9 (Septembre 2011) . - pp. 977-988 Mots-clés : Composite  steel/concrete  Composite  slabs  Lightly  reinforced  members  Failure  conditions  Ductility  Reinforcement  fracture Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper is concerned with the ultimate behavior of lightly reinforced concrete floor slabs under extreme loading conditions. Particular emphasis is given to examining the failure conditions of idealized composite slabs which become lightly reinforced in a fire situation as a result of the early loss of the steel deck. An experimental study is described which focuses on the response of two-way spanning floor slabs with various materials and geometric configurations. The tests enable direct assessment of the influence of a number of key parameters such as the reinforcement type, properties, and ratio on the ultimate response. The results also permit the development of simplified expressions that capture the influence of salient factors such as bond characteristics and reinforcement properties for predicting the ductility of lightly reinforced floor slabs. The companion paper complements the experimental observations with detailed numerical assessments of the ultimate response and proposes analytical models that predict failure of slab members by either reinforcement fracture or compressive crushing of concrete. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i9/p977_s1?bypassSSO=1

Failure assessment of lightly reinforced floor slabs. II, Analytical studies / K. A. Cashell in Journal of structural engineering, Vol. 137 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 9 (Septembre 2011) . - pp. 989-1001 Titre : Failure assessment of lightly reinforced floor slabs. II, Analytical studies Type de document : texte imprimé Auteurs : K. A. Cashell, Auteur ; Elghazouli, A. Y., Auteur ; B. A. Izzuddin, Auteur Année de publication : 2011 Article en page(s) : pp. 989-1001 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Composite  steel/concrete  Composite  slabs  Lightly  reinforced  members  Failure  conditions  Ductility  Reinforcement  fracture  Nonlinear  analysis Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper describes numerical and analytical assessments of the ultimate response of floor slabs. Simplified analytical models and finite-element simulations are described and validated against the experimental results presented in the companion paper. The simplified analytical model accounts for membrane action and the underlying mechanisms related to failure of floor slabs by either reinforcement rupture or compressive crushing of the concrete. In this respect, the significant influence of material properties, including bond strength, is considered in the model and described in detail. A detailed nonlinear finite-element model is also employed to provide further verification of the simplified approach and to facilitate further understanding of the overall response. The results and observations of this study offer an insight into the key factors that govern the ultimate behavior. Finally, the models are applied under elevated temperature conditions to demonstrate their general applicability and reliability. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i9/p989_s1?bypassSSO=1 [article] Failure assessment of lightly reinforced floor slabs. II, Analytical studies [texte imprimé] / K. A. Cashell, Auteur ; Elghazouli, A. Y., Auteur ; B. A. Izzuddin, Auteur . - 2011 . - pp. 989-1001. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 9 (Septembre 2011) . - pp. 989-1001 Mots-clés : Composite  steel/concrete  Composite  slabs  Lightly  reinforced  members  Failure  conditions  Ductility  Reinforcement  fracture  Nonlinear  analysis Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper describes numerical and analytical assessments of the ultimate response of floor slabs. Simplified analytical models and finite-element simulations are described and validated against the experimental results presented in the companion paper. The simplified analytical model accounts for membrane action and the underlying mechanisms related to failure of floor slabs by either reinforcement rupture or compressive crushing of the concrete. In this respect, the significant influence of material properties, including bond strength, is considered in the model and described in detail. A detailed nonlinear finite-element model is also employed to provide further verification of the simplified approach and to facilitate further understanding of the overall response. The results and observations of this study offer an insight into the key factors that govern the ultimate behavior. Finally, the models are applied under elevated temperature conditions to demonstrate their general applicability and reliability. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i9/p989_s1?bypassSSO=1

Rigid-plastic models for the seismic design and assessment of steel framed structures / Málaga-Chuquitaype, C. in Earthquake engineering structural dynamics, Vol. 38 N° 14 (Novembre 2009) 

Public ISBD [article]  in Earthquake engineering structural dynamics > Vol. 38 N° 14 (Novembre 2009) . - pp. 1609-1630 Titre : Rigid-plastic models for the seismic design and assessment of steel framed structures Type de document : texte imprimé Auteurs : Málaga-Chuquitaype, C., Auteur ; Elghazouli, A. Y., Auteur ; Bento, R., Auteur Article en page(s) : pp. 1609-1630 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Rigid-plastic  analysis;  Moment-resisting  frames;  Concentrically-braced  frames;  Seismic  design Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This paper demonstrates the applicability of response history analysis based on rigid-plastic models for the seismic assessment and design of steel buildings. The rigid-plastic force-deformation relationship as applied in steel moment-resisting frames (MRF) is re-examined and new rigid-plastic models are developed for concentrically-braced frames and dual structural systems consisting of MRF coupled with braced systems. This paper demonstrates that such rigid-plastic models are able to predict global seismic demands with reasonable accuracy. It is also shown that, the direct relationship that exists between peak displacement and the plastic capacity of rigid-plastic oscillators can be used to define the level of seismic demand for a given performance target. ISSN : 0098-8847 En ligne : www.interscience.wiley.com/journal/eqe [article] Rigid-plastic models for the seismic design and assessment of steel framed structures [texte imprimé] / Málaga-Chuquitaype, C., Auteur ; Elghazouli, A. Y., Auteur ; Bento, R., Auteur . - pp. 1609-1630. Génie Civil Langues : Anglais (eng) in Earthquake engineering structural dynamics > Vol. 38 N° 14 (Novembre 2009) . - pp. 1609-1630 Mots-clés : Rigid-plastic  analysis;  Moment-resisting  frames;  Concentrically-braced  frames;  Seismic  design Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This paper demonstrates the applicability of response history analysis based on rigid-plastic models for the seismic assessment and design of steel buildings. The rigid-plastic force-deformation relationship as applied in steel moment-resisting frames (MRF) is re-examined and new rigid-plastic models are developed for concentrically-braced frames and dual structural systems consisting of MRF coupled with braced systems. This paper demonstrates that such rigid-plastic models are able to predict global seismic demands with reasonable accuracy. It is also shown that, the direct relationship that exists between peak displacement and the plastic capacity of rigid-plastic oscillators can be used to define the level of seismic demand for a given performance target. ISSN : 0098-8847 En ligne : www.interscience.wiley.com/journal/eqe