Derivation of practical reliability-based post-fire assessment tools for structural elements

A practical reliability-based post-fire assessment method has been presented in earlier work which evaluates the maximum allowable characteristic value of the imposed load effect on concrete elements after being subjected to fire. The method is known as the ReAssess method and can be extended to cover the post-fire assessment of other material types, structural members and limit states. This extension however requires knowledge of the methodology underlying the derivation of the basic equations. In this paper a detailed overview of this methodology is presented for the first time, incorporating all the steps from the definition of the limit state problem up to the verification of the reliability obtained when applying the method. The presented methodology allows for the development of practical reliability-based post-fire assessment tools to a broad range of structural members. An example derivation is given illustrating the application of the presented concepts to the post-fire bending limit state for a simply supported concrete slab.

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