Risk Assessment of Steel Structures under Fire

Abstract eng:
Fire following earthquake is the one of the most concerning earthquake-related hazard in urban areas. In fact, in some cases it has been of catastrophic proportions. Actually, it is possible that particular building characteristics and density, meteorological conditions and other factors can combine to create a situation in which fire following earthquake is the predominant agent of damage. In addition, in case of fire following earthquake, the structural fire performances may be strongly impaired due to the presence of possible earthquake-induced damage, with consequent reduction of the fire resistance. In this context, this paper shows a preliminary brief overview of the most relevant research on the risk of fire following earthquake. Therefore, a methodology, conceived in the framework of the performance-based approach, for the assessment of the fire resistance of structures damaged by earthquake in relation to different structural damage levels is illustrated. As an example, it is applied to steel structures, with the aid of coupled temperature-displacement numerical analyses.

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