Print Email Facebook Twitter Numerical Analysis of Stability of Steel Columns With Thermal Gradients Title Numerical Analysis of Stability of Steel Columns With Thermal Gradients Author Delgado, O. Contributor Bijlaard, F.S.K. (mentor) Abspoel, R. (mentor) Hendriks, M.A.N. (mentor) Houben, L.J.M. (mentor) Maljaars, J. (mentor) Faculty Civil Engineering and Geosciences Department Structural Engineering Programme Steel and timber structures Date 2015-01-08 Abstract This thesis studies the buckling behavior of I-shaped steel columns under the effect of thermal gradients. The mechanical properties of steel decay signicantly with increasing temperature. Therefore, in case of a re, the buckling resistance of steel columns is considerably reduced due to the decrease in the modulus of elasticity and yield strength. Furthermore, in a realistic re scenario, temperature gradients develop throughout the cross-section and throughout the column's length. However, the design guidelines in Eurocode 1993-1-2, as well as in other leading construction codes, specify that in the case of a non-uniform temperature distribution the column's buckling resistance must be determined by considering a uniform temperature distribution considering the maximum temperature in the cross-section. The objective of this thesis is to assess the reliability of the provisions given by the Eurocode for elevated temperature design in the presence of temperature gradients. A series of finite element models were created for five different cross-sections and analyzed at room temperature, uniform elevated temperature and non-uniform temperature along the cross-section. From the uniform elevated temperature analysis, a buckling curve for elevated temperature was derived. The finite element analysis results for the models under the effect of temperature gradients showed better agreement with this FEM-derived buckling curve than with the Eurocode provisions, which were shown to be over-conservative for the case of a temperature gradient along the column's weak axis. The FEM results were also compared to the results obtained with the American and Australian building codesÂ…. Subject finite element analysiscolumn bucklingsteel structuresfire safety To reference this document use: http://resolver.tudelft.nl/uuid:3c8bdf8c-97cc-4e90-8c6a-f2b8cb0029c1 Part of collection Student theses Document type master thesis Rights (c) 2015 Delgado, O. Files PDF Final_Report.pdf 7.33 MB Close viewer /islandora/object/uuid:3c8bdf8c-97cc-4e90-8c6a-f2b8cb0029c1/datastream/OBJ/view