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

Coile, Ruben Van; Caspeele, Robby; Taerwe, Luc

doi:10.1002/suco.201300084

Cited by 13 publications

(16 citation statements)

References 32 publications

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“…A practical methodology for the reliability-based post-fire assessment of concrete elements has been presented in (Van Coile, 2015), improving the initial concepts and ideas introduced in (Van Coile et al, 2014). As discussed in Section 2, this reliability-based assessment methodology is denoted here as the ReAssess-method.…”

Section: Methodsmentioning

confidence: 99%

“…In (Van Coile et al, 2014), a Beta distribution is proposed to characterize kfy,res, based on test results mentioned in fib Bulletin 46 (fib, 2008). The proposed Beta distribution is symmetrical around its mean value µkfy,res and is bounded on both sides of the mean by 2 times the standard deviation σkfy,res.…”

Section: Derivation Of Analytical Formulasmentioning

confidence: 99%

“…Having determined an analytical formula for R, the mean value µR and coefficient of variation VR of the resistance effect R must be assessed for application of the ReAssess-method as described in the flowchart of Figure 11. As in (Van Coile et al, 2014) both parameters can be assessed by a first-order Taylor approximation see (20)- (22) where µ is the vector with the mean values for all the parameters Xi (e.g. mean value µh for the slab thickness h).…”

Section: Derivation Of Analytical Formulasmentioning

confidence: 99%

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Assessment of damage and residual load bearing capacity of a concrete slab after fire: Applied reliability-based methodology

Molkens¹,

Coile

Gernay

2017

Engineering Structures

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For most fires occurring in buildings with a concrete structural frame, the structural elements do not collapse during fire exposure, and further use of the building after fire may be possible. Fire can nevertheless result in a permanent loss of strength and thus a post-fire evaluation of the residual load bearing capacity has to be made to inform decisions on continued use and the need for structural repairs. This evaluation is however particularly difficult due to the many uncertainties associated with both the fire exposure and the characteristics of the structural elements. These uncertainties cannot be neglected when determining the residual capacity since adequate safety is a major societal concern as indicated by the predominance of safety in current design standards and guidance documents. In this paper a comprehensive methodology is presented for the assessment of the residual capacity of concrete structures after exposure to fire. The methodology is introduced through application to a real-life case study of an apartment fire with a focus on the end-span of the affected continuous concrete slab. It results in a reliability-based evaluation of the maximum allowable characteristic value for the imposed load on the slab. The presented methodology is useful to make informed decision about continued use of structures after a fire event.

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Section: Methodsmentioning

confidence: 99%

Section: Derivation Of Analytical Formulasmentioning

confidence: 99%

Section: Derivation Of Analytical Formulasmentioning

confidence: 99%

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Assessment of damage and residual load bearing capacity of a concrete slab after fire: Applied reliability-based methodology

Molkens¹,

Coile

Gernay

2017

Engineering Structures

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“…A practical method to determine this damage ratio for concrete slabs after fire exposure has been proposed in (Van Coile et al, 2014). Using this post-fire assessment method and the slab characteristics of Table 1 as input data for the calculations, q k,max / q k,d has been determined for different concrete covers and ISO 834 fire durations in Table 2.…”

Section: Application: Optimum Concrete Cover For Concrete Slabmentioning

confidence: 99%

Cost-Optimization of Concrete Slabs Exposed to Natural Fires, Taking into Account Post-Fire Behavior

Coile

Caspeele

Taerwe

2014

Vulnerability, Uncertainty, and Risk

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Structural fire safety is a topic of general concern, but the utility of investments in structural fire safety is often questioned based on the fact that the probability of fire exposure during the lifetime of a structure is generally small. Considering the current trend towards performance based design, optimum design solutions have to be determined in which upfront investments are balanced with gains in fire safety during the lifetime of the structure. In this paper a basic framework is presented, taking into account the probability of fire ignition and successful fire suppression, the probability of structural failure during fire and the costs of rehabilitation after fire exposure. The presented methodology is applied to determine the optimum concrete cover for a concrete slab as a function of the fire load density in case of natural fires.

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“…Sidibé et al investigated the reliability of concrete columns exposed to the ISO 834 standard fire curve [7], while Wang et al [8] and Eamon and Jensen [9,10] used an analytical formulation to assess the reliability of concrete beams. Recently, Guo et al [11] presented a framework for assessing the reliability of structural elements, taking into account an uncertain fire load, and Van Coile et al proposed an easy-to-use reliability-based framework for assessing the residual load bearing capacity after fire exposure [12]. Despite the increasing interest in this research topic, a clear evaluation of the reliability of the design format of EN 1992-1-2 with respect to the load bearing capacity has not yet been developed.…”

Section: Introductionmentioning

confidence: 99%

Reliability-based evaluation of the inherent safety presumptions in common fire safety design

Coile

Caspeele

Taerwe

2014

Engineering Structures

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

Cited by 13 publications

References 32 publications

Assessment of damage and residual load bearing capacity of a concrete slab after fire: Applied reliability-based methodology

Assessment of damage and residual load bearing capacity of a concrete slab after fire: Applied reliability-based methodology

Cost-Optimization of Concrete Slabs Exposed to Natural Fires, Taking into Account Post-Fire Behavior

Reliability-based evaluation of the inherent safety presumptions in common fire safety design

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