Fire resistance of a gas tank

Fire resistance of the double concrete walls of a gas tank (Lespinasse, France)
Study of the gas tank behaviour under fire sollicitation by 3D numerical modelling and thermal non linear time history analysis.
The study provided by NECS included :
– Validation of the structure design under fire sollicitation and check of its resistance and imperviousness functions,
– Temperature calculation in all points of the structure thanks to a thermal non linear time history analysis,
– Use of the calculated temperatures and input into a modelling for non linear mecanical analysis,
– Check of the calculation convergence at each moment taking into account the deterioration of the material properties under the rise of temperature.

Tank geometry Temperature variation through the wall Temperature variation charts vs time through the wall Distortion of the structure at different times

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