The paper describes the development of a two-dimensional (2D) nonlinear beam finite element that includes advanced path-following capabilities for detecting bifurcation instability of steel elements subjected to fire loading. A co-rotational formulation was used for describing the beam kinematic. The degradation of the steel mechanical properties at high temperature according to the Eurocode 1993-1-2 was considered by integrating the material constitutive law based on a predetermined temperature field in the cross section. Advanced path-following methods were implemented to analyse the elastic-plastic post-buckling behaviour of compressed steel elements at high temperature without the need of introducing geometrical imperfections. To highlight the practical implications, a parametric analysis showed that the element could reproduce the EN1993-1-2 buckling curve. The obtained outcomes were validated against experimental and numerical data obtained with commercial software ABAQUS and SAFIR.

A 2D beam element for the analysis of flexural buckling of steel structures at elevated temperatures / Tondini, N.; Morbioli, A.; Battini, J. M.. - (2018), pp. 199-208. ((Intervento presentato al convegno International Conference of Applications of Structural Fire Engineering, ASFE 2017 tenutosi a Manchester, UK nel 7-8 settembre 2017 [10.1201/9781315107202-23].

A 2D beam element for the analysis of flexural buckling of steel structures at elevated temperatures

Tondini, N.;Morbioli, A.;
2018

Abstract

The paper describes the development of a two-dimensional (2D) nonlinear beam finite element that includes advanced path-following capabilities for detecting bifurcation instability of steel elements subjected to fire loading. A co-rotational formulation was used for describing the beam kinematic. The degradation of the steel mechanical properties at high temperature according to the Eurocode 1993-1-2 was considered by integrating the material constitutive law based on a predetermined temperature field in the cross section. Advanced path-following methods were implemented to analyse the elastic-plastic post-buckling behaviour of compressed steel elements at high temperature without the need of introducing geometrical imperfections. To highlight the practical implications, a parametric analysis showed that the element could reproduce the EN1993-1-2 buckling curve. The obtained outcomes were validated against experimental and numerical data obtained with commercial software ABAQUS and SAFIR.
Applications of Fire Engineering - Proceedings of the International Conference of Applications of Structural Fire Engineering, ASFE 2017
AA.VV.
London, UK
CRC Press/Balkema
9781351606394
Tondini, N.; Morbioli, A.; Battini, J. M.
A 2D beam element for the analysis of flexural buckling of steel structures at elevated temperatures / Tondini, N.; Morbioli, A.; Battini, J. M.. - (2018), pp. 199-208. ((Intervento presentato al convegno International Conference of Applications of Structural Fire Engineering, ASFE 2017 tenutosi a Manchester, UK nel 7-8 settembre 2017 [10.1201/9781315107202-23].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/226436
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