This article explores in depth the various aspects of fire resistance of steel and composite (steel-concrete) structures. He points out that the performance of steel degrades under the effect of heat and that several factors, such as the duration of exposure to fire and the loads applied, influence this performance. Solutions to improve fire resistance are also discussed, including the use of insulating barriers and intumescent paints. The article discusses standards and calculation methods, notably Eurocodes 3 and 4 and the ISO-834 standard, and proposes modern methods such as numerical simulations to assess fire resistance.
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