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Eccentric axial load testing for concrete-encased steel columns using 800 MPa steel and 100 MPa concrete / Chang-Soo Kim in Journal of structural engineering, Vol. 138 N° 8 (Août 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 8 (Août 2012) . - pp.1019–1031 Titre : Eccentric axial load testing for concrete-encased steel columns using 800 MPa steel and 100 MPa concrete Type de document : texte imprimé Auteurs : Chang-Soo Kim, Auteur ; Hong-Gun Park, Auteur ; Kyung-Soo Chung, Auteur Année de publication : 2012 Article en page(s) : pp.1019–1031 Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Concrete-encased  steel  Composite  column  High-strength  steel  High-strength  concrete  Eccentric  loading Résumé : Seven concrete-encased steel columns using high-strength steel (nominal yield strength fys=913 and 806 MPa) and high-strength concrete (cylinder compressive strength f′c=94 and 113 MPa) were tested to investigate the eccentric axial load-carrying capacity and the deformation capacity. The test parameters were full or partial concrete-encasement, the eccentricity of the axial load, and the effect of lateral reinforcement. Because the yield strain (≈0.004) of the high-strength steel is greater than the ultimate compressive strain (≈0.003) of the concrete subjected to short-term loads, the current study focused on the effect of early concrete crushing on the behavior of the composite columns. The test results showed that in the case of inadequate lateral confinement, the load-carrying capacity was limited by the early crushing of concrete. However, because of the high-strength steel section, all test specimens showed ductile flexural behavior after the delamination of the concrete. The test results were compared with the predictions by nonlinear numerical analysis and current design codes. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000533 [article] Eccentric axial load testing for concrete-encased steel columns using 800 MPa steel and 100 MPa concrete [texte imprimé] / Chang-Soo Kim, Auteur ; Hong-Gun Park, Auteur ; Kyung-Soo Chung, Auteur . - 2012 . - pp.1019–1031. Génie civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 8 (Août 2012) . - pp.1019–1031 Mots-clés : Concrete-encased  steel  Composite  column  High-strength  steel  High-strength  concrete  Eccentric  loading Résumé : Seven concrete-encased steel columns using high-strength steel (nominal yield strength fys=913 and 806 MPa) and high-strength concrete (cylinder compressive strength f′c=94 and 113 MPa) were tested to investigate the eccentric axial load-carrying capacity and the deformation capacity. The test parameters were full or partial concrete-encasement, the eccentricity of the axial load, and the effect of lateral reinforcement. Because the yield strain (≈0.004) of the high-strength steel is greater than the ultimate compressive strain (≈0.003) of the concrete subjected to short-term loads, the current study focused on the effect of early concrete crushing on the behavior of the composite columns. The test results showed that in the case of inadequate lateral confinement, the load-carrying capacity was limited by the early crushing of concrete. However, because of the high-strength steel section, all test specimens showed ductile flexural behavior after the delamination of the concrete. The test results were compared with the predictions by nonlinear numerical analysis and current design codes. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000533