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Experimental and analytical investigation of concrete filled steel tubular columns / Zhijing Ou in Journal of structural engineering, Vol. 137 N° 6 (Juin 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 6 (Juin 2011) . - pp. 635-645 Titre : Experimental and analytical investigation of concrete filled steel tubular columns Type de document : texte imprimé Auteurs : Zhijing Ou, Auteur ; Baochun Chen, Auteur ; Kai H. Hsieh, Auteur Année de publication : 2011 Article en page(s) : pp. 635-645 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Experimental  testing  Finite-element  analysis  Laboratory  testing  Concrete-filled  steel  tube  (CFST)  Laced  column  Ultimate  capacity Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : In this paper, an experimental and analytical investigation of concrete-filled steel tubular (CFST) laced columns is presented. These columns consist of four concrete-filled steel tubes that are laced together. A total of 27 experimental tests were conducted to quantify the column failure mechanism at ultimate loads. The experiments were designed to obtain the load-deflection curves. These curves were subsequently used to quantify the structural behavior for each element of the hybrid column. Experimental results indicate that the compression force in the longitudinal members dominated the failure mechanism in the CFST columns. In-plane bending occurred when member segments reached the compression failure load. The forces in the lacing members (diagonal and horizontal bracing) were found to be small and remained in the elastic range through failure. The experimental study was used to validate an analytical parametric study. The analytical study showed that increasing slenderness ratios and eccentricities reduced the ultimate load capacity. Additionally, finite-element analyses of CFST columns based on four in situ structures were performed to determine the ultimate load-carrying capacity and were subsequently compared to several building codes. On the basis of the analytical results, a new methodology for calculating the ultimate load-carrying capacity is proposed. This purposed methodology is compared with five different building codes to quantify the increased accuracy. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i6/p635_s1?isAuthorized=no [article] Experimental and analytical investigation of concrete filled steel tubular columns [texte imprimé] / Zhijing Ou, Auteur ; Baochun Chen, Auteur ; Kai H. Hsieh, Auteur . - 2011 . - pp. 635-645. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 6 (Juin 2011) . - pp. 635-645 Mots-clés : Experimental  testing  Finite-element  analysis  Laboratory  testing  Concrete-filled  steel  tube  (CFST)  Laced  column  Ultimate  capacity Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : In this paper, an experimental and analytical investigation of concrete-filled steel tubular (CFST) laced columns is presented. These columns consist of four concrete-filled steel tubes that are laced together. A total of 27 experimental tests were conducted to quantify the column failure mechanism at ultimate loads. The experiments were designed to obtain the load-deflection curves. These curves were subsequently used to quantify the structural behavior for each element of the hybrid column. Experimental results indicate that the compression force in the longitudinal members dominated the failure mechanism in the CFST columns. In-plane bending occurred when member segments reached the compression failure load. The forces in the lacing members (diagonal and horizontal bracing) were found to be small and remained in the elastic range through failure. The experimental study was used to validate an analytical parametric study. The analytical study showed that increasing slenderness ratios and eccentricities reduced the ultimate load capacity. Additionally, finite-element analyses of CFST columns based on four in situ structures were performed to determine the ultimate load-carrying capacity and were subsequently compared to several building codes. On the basis of the analytical results, a new methodology for calculating the ultimate load-carrying capacity is proposed. This purposed methodology is compared with five different building codes to quantify the increased accuracy. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i6/p635_s1?isAuthorized=no