Towards a reliability-based post-fire assessment method for concrete slabs incorporating information from inspection

After a concrete structure has been exposed to fire, a combination of destructive and non‐destructive testing, expert judgment and calculations is used to decide whether the structure should be demolished or repaired, or can continue to be used without repairs or rehabilitation. However, there are m...

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Bibliographic Details
Published in:Structural concrete : journal of the FIB 2014-09, Vol.15 (3), p.395-407
Main Authors: Van Coile, Ruben, Caspeele, Robby, Taerwe, Luc
Format: Article
Language:English
Subjects:
analysis and design methods
Applied sciences
Assessments
building maintenance/refurbishment
Building structure
Building technical equipments
Buildings
Buildings. Public works
concrete slab
Concrete structure
Concrete structures
Concretes
Construction (buildings and works)
Exact sciences and technology
Exposure
fire
Fire behavior of materials and structures
Fire protection
Fires
Mathematical analysis
post-fire assessment
residual strength
Safety
safety level
Slabs
Stresses. Safety
Structural analysis. Stresses
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Summary:After a concrete structure has been exposed to fire, a combination of destructive and non‐destructive testing, expert judgment and calculations is used to decide whether the structure should be demolished or repaired, or can continue to be used without repairs or rehabilitation. However, there are many uncertainties associated with both the fire duration and the effect of elevated temperatures on the residual mechanical properties of the materials. Consequently, the maximum service load after fire exposure should be assessed based on reliability considerations in order to provide an adequate level of safety. As this type of calculation is too complex and time‐consuming for practical use, a reliability‐based assessment tool has been developed for concrete structures and applied to slabs to determine the maximum service load after fire. When using the proposed method, a safety level is targeted which is comparable with the safety level associated with the Eurocode format for the design of new structures. It is concluded that the proposed assessment method is both user‐friendly and directly applicable in practice.
ISSN:1464-4177
1751-7648
DOI:10.1002/suco.201300084