Evaluation of fire resistance of structural elements considering nonlinearity of deformation processes during fire
Journal Title: Вісник Тернопільського національного технічного університету - Year 2016, Vol 81, Issue 1
Abstract
A mathematical model for quantitative description of thermomechanical processes in structural elements under fire was proposed, with taking into account an elastic-plastic deformation and temperature dependence of material properties. The model is grounded on the equations of heat transfer theory and nonlinear thermo mechanics and is focused on the numerical methods of research. A method for numerical simulation of deformation processes in element structures subjected to intensive thermal- power loads was built on the bases of finite element method. The temperature dependent deformation curves, physical and mechanical characteristics are approximated by interpolation splines reconstructed by the experimental points of well known dependencies capturing the mechanical behavior of materials in wide temperature range. As an example, the computer simulations of thermo mechanical behavior of a steel structure subjected to fire conditions was carried out. Its fire resistance has been estimated.
Authors and Affiliations
Bogdan Drobenko, Aleksander Buryk
Keywords
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