comportement des poteaux composites en profils creux en acier remplis de béton behavior of composite columns in hollow steel section filled with concrete
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ID: 245905
2012
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Abstract
Le but de cet article, est la determination des rigidites flexionnelles EIx et EIy d’fune section mixte acier beton et plus precisement d’fun poteau en tube d’facier de section rectangulaire, remplie de beton, sollicitee a la flexion bi-axiale (N, Mx et My). L’festimation des rigidites sera faite a partir d’fune approche theorique par une analyse du poteau en elements finis (element barre a 4 degres de liberte), basee sur les conditions d’fequilibres a mi-portee en utilisant la relation moment-courbure (M–Φ) de l’felement deforme par application de l’fequation suivante: EI=M/Φ. Le comportement des materiaux est celui comme adopte par les reglements Eurocode 2 et 3, respectivement pour le beton et l’facier. Afin de valider l’fapproche theorique utilisee dans cette etude, deux comparaisons ont ete faites : une premiere permettant de comparer les resultats des rigidites determinees par les relations moments courbures et celles calculees par l’fEurocode 4 et une deuxieme comparaison entre les charges de ruines de deux poteaux de grandeurs natures avec ceux testes au laboratoire [2]. Au vu des resultats obtenus, nous pouvons conclure que l’approche théorique utilisée dans cette étude ainsi que les modèles de comportement des matériaux sont adéquats pour ce genre de problèmes.
The purpose of this paper is the determination of flexural stiffness EIx and EIy of a concrete filled rectangular cross section of a composite steel column, under biaxial bending (N, Mx and My). The rigidities will be estimated from a theoretical approach using a finite element analysis (element bar with 4 degrees of freedom), based on the equilibrium conditions at mid-span using the moment-curvature relationships (M–Φ) of the deformed element by applying the following equation: EI=M/Φ. The material behavior is the one adopted by Eurocode 2 and 3, respectively, for concrete and steel. To validate the theoretical approach used, two comparisons were made: one comparing the rigidities given by the moment-curvature relations versus those calculated by the Eurocode 4, and a second comparison between failure loads of two columns scale one with those tested in the laboratory [2]. Based on the results obtained, we may conclude that the theoretical approach used in this study and the models of behavior of materials are suitable for such problems.
The purpose of this paper is the determination of flexural stiffness EIx and EIy of a concrete filled rectangular cross section of a composite steel column, under biaxial bending (N, Mx and My). The rigidities will be estimated from a theoretical approach using a finite element analysis (element bar with 4 degrees of freedom), based on the equilibrium conditions at mid-span using the moment-curvature relationships (M–Φ) of the deformed element by applying the following equation: EI=M/Φ. The material behavior is the one adopted by Eurocode 2 and 3, respectively, for concrete and steel. To validate the theoretical approach used, two comparisons were made: one comparing the rigidities given by the moment-curvature relations versus those calculated by the Eurocode 4, and a second comparison between failure loads of two columns scale one with those tested in the laboratory [2]. Based on the results obtained, we may conclude that the theoretical approach used in this study and the models of behavior of materials are suitable for such problems.
| Reference Key |
n.2012mateccomportement
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|---|---|
| Authors | ;Othmani N.;Fellah F.;Seridi A. |
| Journal | acta botânica brasílica |
| Year | 2012 |
| DOI |
10.1051/matecconf/20120202007
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