Pollack Periodica · 2021 · 11 citations · 11 references
EngineeringCivil EngineeringMaterials ScienceFinite Element AnalysisFinite Element MethodsStructural EngineeringBending Of BeamsBuckling AnalysisBuckling Of ColumnsPlate TheorySteel StructuresStructural Finite Element AnalysisBeam Finite Element AnalysisBucklingImperfection SensitivityLoad CapacityLoad Capacity AnalysisMaterial Behaviour At Elevated TemperaturesUltimate Load AnalysisUltimate Load Capacity
Abstract This paper presents an investigation on the influence of structural imperfections on the ultimate load capacity of steel welded beam-columns with class 4 cross-section under elevated temperatures. This is done by considering different amplitudes for the global and local (plate) imperfections, and different residual stresses distributions available in the literature. To this purpose, a geometrically and materially non-linear finite element model using Abaqus software has been used to determine the buckling resistance of a steel welded beam-column at elevated temperatures, using the material properties of EN1993-1-2. The imperfection sensitivity of beam-columns is reported: the influences of the amplitudes of the geometric imperfection and the patterns of the residual stress on the load capacity are compared.
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