Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Application of the finite element method for two-dimensional thermal analysis of steel-concrete composite structures in fire
Submission Author:
Natan Sian das Neves , ES , Brazil
Co-Authors:
Natan Sian das Neves
Presenter: Natan Sian das Neves
doi://10.26678/ABCM.ENCIT2020.CIT20-0173
Abstract
In the area of structures in fire, the structural elements under the action of high thermal gradients, the thermophysical properties of the materials degrade, and, consequently, the strength of the element is reduced. In this context, the temperature field in the cross-section becomes important for analysis and design verifications. This article applied a computational tool developed in MATLAB environment,called NASEN, to perform two-dimensional thermal analysis of the nonlinear nature of structural elements under fire condition. The basic theory of the program is based on Galerkin finite element procedures, making it possible to simulate varied geometries with different physical properties as a function of temperature. Also, different fire curves, such as ISO 834, parametric or experimental, can be inserted into the program. The test cases are based on composite steel-concrete structures. To evaluate the performance of the program, numerical solutions, and experimental data available in the literature are used. In summary, the results show a good correlation with the reference solutions, directing a good calibration of the program developed to solve the proposed problems.
Keywords
Finite Element Method, Fire, Thermal Analysis, Composite steel-concrete
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