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Inelastic thermal analysis of preloaded steel trusses undergoing heating and cooling stages / T. J. Lin in Journal of engineering mechanics, Vol. 138 N° 5 (Mai 2012) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 138 N° 5 (Mai 2012) . - pp.468-477 Titre : Inelastic thermal analysis of preloaded steel trusses undergoing heating and cooling stages Type de document : texte imprimé Auteurs : T. J. Lin, Auteur ; C. W. Huang, Auteur ; Y. B. Yang, Auteur Année de publication : 2012 Article en page(s) : pp.468-477 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Cooling  Heating  Inelastic  thermal  analysis  Steel  truss  Updated  lagrangian  formulation Résumé : The inelastic nonlinear behaviors of preloaded steel trusses undergoing heating and cooling cycles, a problem not well treated previously, are studied in this paper. A bilinear elastoplastic model with a kinematic strain-hardening rule is adopted for steel at varying temperatures. The material softening effects at elevated temperatures are taken into account via the Eurocode 3 reduction factors. The plastic strain resulting from strain reversal upon unloading at a given temperature is considered in updating the stress-strain curve for the next temperature increment. Two simple trusses are adopted to illustrate the physical phenomena involved. All the equations are presented in incremental form, consistent with the updated Lagrangian formulation. The results for the trusses are believed to be new and can be adopted as the benchmarks for validating other numerical approaches used in treating problems involving the heating and cooling stages. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000343 [article] Inelastic thermal analysis of preloaded steel trusses undergoing heating and cooling stages [texte imprimé] / T. J. Lin, Auteur ; C. W. Huang, Auteur ; Y. B. Yang, Auteur . - 2012 . - pp.468-477. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 138 N° 5 (Mai 2012) . - pp.468-477 Mots-clés : Cooling  Heating  Inelastic  thermal  analysis  Steel  truss  Updated  lagrangian  formulation Résumé : The inelastic nonlinear behaviors of preloaded steel trusses undergoing heating and cooling cycles, a problem not well treated previously, are studied in this paper. A bilinear elastoplastic model with a kinematic strain-hardening rule is adopted for steel at varying temperatures. The material softening effects at elevated temperatures are taken into account via the Eurocode 3 reduction factors. The plastic strain resulting from strain reversal upon unloading at a given temperature is considered in updating the stress-strain curve for the next temperature increment. Two simple trusses are adopted to illustrate the physical phenomena involved. All the equations are presented in incremental form, consistent with the updated Lagrangian formulation. The results for the trusses are believed to be new and can be adopted as the benchmarks for validating other numerical approaches used in treating problems involving the heating and cooling stages. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000343