Numerical models validation of cracked square hollow section (SHS) Y- and K-joints / Seng-Tjhen Lie in Journal of structural engineering, Vol. 137 N° 10 (Octobre 2011)  

Public ISBD [article]  inJournal of structural engineering > Vol. 137 N° 10 (Octobre 2011) . - pp. 1132-11405 Titre : Numerical models validation of cracked square hollow section (SHS) Y- and K-joints Type de document : texte imprimé Auteurs : Seng-Tjhen Lie, Auteur ; Zheng-Mao Yang, Auteur Année de publication : 2012 Article en page(s) : pp. 1132-11405 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Axial load Crack mouth opening displacement Square hollow section Plastic collapse YY- and KK-joints Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : To validate the accuracy of finite-element models of cracked square hollow section (SHS) Y- and K-joints, two full-scale precracked specimens were tested under static incremental loads up to failure. The load-displacement curves were plotted during the tests, and a set of linear variable displacement transducers (LVDTs) were used to record the crack mouth opening displacements (CMOD) at the deepest points, whereas the crack extension was captured using the standard Alternating Current Potential Drop (ACPD) technique. The experimental results are compared with the corresponding numerical results obtained using the nonlinear finite-element method. Both sets of results show good agreement with maximum percentage differences of 7.15 and 7.96% for the plastic collapse loads and crack mouth opening displacements, respectively. Hence, the numerical model adopted previously for the cracked SHS T-joints is robust and can also be used to estimate the plastic collapse load Pc and crack driving force Jep of any uniplanar tubular cracked Y- and K-joints. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i10/p1132_s1?isAuthorized=no [article] Numerical models validation of cracked square hollow section (SHS) Y- and K-joints [texte imprimé] / Seng-Tjhen Lie, Auteur ; Zheng-Mao Yang, Auteur . - 2012 . - pp. 1132-11405. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 10 (Octobre 2011) . - pp. 1132-11405 Mots-clés : Axial load Crack mouth opening displacement Square hollow section Plastic collapse YY- and KK-joints Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : To validate the accuracy of finite-element models of cracked square hollow section (SHS) Y- and K-joints, two full-scale precracked specimens were tested under static incremental loads up to failure. The load-displacement curves were plotted during the tests, and a set of linear variable displacement transducers (LVDTs) were used to record the crack mouth opening displacements (CMOD) at the deepest points, whereas the crack extension was captured using the standard Alternating Current Potential Drop (ACPD) technique. The experimental results are compared with the corresponding numerical results obtained using the nonlinear finite-element method. Both sets of results show good agreement with maximum percentage differences of 7.15 and 7.96% for the plastic collapse loads and crack mouth opening displacements, respectively. Hence, the numerical model adopted previously for the cracked SHS T-joints is robust and can also be used to estimate the plastic collapse load Pc and crack driving force Jep of any uniplanar tubular cracked Y- and K-joints. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i10/p1132_s1?isAuthorized=no

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