Abstract
This article presents linked computational approach for fire simulation and its effects on structure using adiabatic surface temperature. The simulation solves a weakly-linked problem, consisting of computational fluid dynamics (CFD), heat transport and mechanical model. The temperature field from the CFD creates Cauchy and radiative boundary conditions for the thermal model. The temperature field from an element is passed further to the mechanical model, which induces thermal strain and modifies material parameters. This article also brings a validation of the linked simulation, based on experiment with a concrete block exposed to fire in a furnace. The material model uses standard material properties given in Eurocode 2 - EN 1992-1-2.
Highlights
Structural fire assessment creates essential part in design and maintenance of steel, concrete or timber structures
The issue of computational fluid dynamics (CFD) is solved with the Fire Dynamics Simulator software (FDS) [2], developed at NIST
We present a validation based on a concrete block (0.35 m×0.15×0.2 m) exposed to fire in a horizontal
Summary
Structural fire assessment creates essential part in design and maintenance of steel, concrete or timber structures. We created a standardized API for governing the computation and exporting the data, which brought some changes in the structure of the code. This computation provides the temperature fields for the following thermal analysis. Interfacing FDS and OOFEM is realized using MuPIF [5] Python library, which provides useful tools such as exporting data to VTU format, parallel computations and advanced handling with data fields and meshes. Both the FDS Fortran and OOFEM C++ codes were compiled as shared libraries and imported into the Python code.
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