Numerical modelling of internal voids in fire exposed structures

• Author(s): Fonseca, E.M.M. ; Oliveira, C.A.M de
• Date: 2001
• Persistent ID: http://hdl.handle.net/10198/2055
• Origin: Biblioteca Digital do IPB
• Subject(s): Internal void; Temperature; Finite elements; Eurocodes; Heat transfer; Fire with standard temperature-time curve ISO 834
• Document Type: Article
• Language: English

Description

The study of steel structures at elevated temperatures needs the characterisation of the thermal action and the material thermal properties variation with temperature as well as the thermal conduction problem solution in a domain with well know boundary conditions. Structures may have internal voids (figure 1) filled with air (hollow columns, profile sections thermally insulated, steel pipes,…). In the presence of internal voids, the internal air temperature will be determined with some simplified formulas deduced from heat transfer equations