A framework for probabilistic fire loss estimation in concrete building structures

Ni, Shuna; Gernay, Thomas

doi:10.1016/j.strusafe.2020.102029

Cited by 18 publications

(17 citation statements)

References 36 publications

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“…The cost-benefit analysis requires the estimation of fire loss. A framework [7] has been proposed to estimate the direct fire loss in concrete structures. The framework considers different possible fire scenarios within the building, corresponding to different possible ignition locations.…”

Section: Fire Loss Estimationmentioning

confidence: 99%

“…Therefore, two EDPs are selected to assess the damage in the members. The first EDP is the heat penetration depth of the 300°C isotherm in the section, to address the material damage due to heat penetration [7]. Different repair actions are required as a function of the heat penetration.…”

Section: Description Of Edps Dss Fragility Functions and Loss Functionsmentioning

confidence: 99%

“…The damage states of the column, corresponding to different levels of repair efforts, are mapped to different EDP thresholds. The damage related to the heat penetration of the 300 ℃ isotherm has four states, which has been described in details in [7]. The damage related to the residual out-of-plane deformation has only two states, i.e., MRODR exceeding the threshold value (replacement) or not (no action).…”

Section: Description Of Edps Dss Fragility Functions and Loss Functionsmentioning

confidence: 99%

“…The lognormal distribution of the lower threshold of each damage state, as a probabilistic function of the EPD, is the fragility function that represents the probability that a component reaches or exceeds a specified damage state [7].…”

Section: Description Of Edps Dss Fragility Functions and Loss Functionsmentioning

confidence: 99%

“…However, most current studies related to the design optimization calculate the lifetime costs, particularly the repair cost, only based on a binary damage criterion, failure or no failure [4][5][6], which may not be suitable for some scenarios where a finer degree of granularity in defining fire damage is required, e.g., for reinforced concrete (RC) structures that usually do not collapse under fire but require significant repair efforts for continued use. To overcome this limitation, this paper incorporates a recently developed fire loss estimation method [7] into a lifetime cost optimization. The loss estimation method addresses gradual levels of damage states and the corresponding repair efforts, in addition to a binary failure/no failure criterion, thus providing a more refined estimate of the repair costs.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Lifetime economically optimum position of steel reinforcement in a concrete column exposed to natural fire

Ni¹,

Coile²,

Khorasani³

et al. 2020

Proceedings of the 11th International Conference on Structures in Fire (SiF2020)

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This paper incorporates a probabilistic fire loss assessment method for reinforced concrete structures into a cost-benefit analysis to optimize a structural fire design. Economic losses in case of failure and survival of the structure are both quantified with, in the latter case, an estimate of the damage and repairs costs. As a case study, a cost-benefit optimization of the position of rebars in a concrete column is investigated. The column response in fire is evaluated using finite element simulations in SAFIR. Variations in cover thickness result in variations in failure probabilities and, for cases where no failure occurs, variations in repair costs due to heat penetration and residual out-of-plane deformation of the column. The optimum cover thickness is the one that offers the best trade-off between the various repair costs across the range of likely fire intensity levels. This optimum is sensitive to repair decisions such as the tolerance on the acceptable residual out-of-plane deformation after a fire. For the studied cases, the optimum cover thickness is smaller in slender columns than in stocky columns due to greater out-of-plane deformations in the former.

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Section: Fire Loss Estimationmentioning

confidence: 99%

Section: Description Of Edps Dss Fragility Functions and Loss Functionsmentioning

confidence: 99%

Section: Description Of Edps Dss Fragility Functions and Loss Functionsmentioning

confidence: 99%

Section: Description Of Edps Dss Fragility Functions and Loss Functionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Lifetime economically optimum position of steel reinforcement in a concrete column exposed to natural fire

Ni¹,

Coile²,

Khorasani³

et al. 2020

Proceedings of the 11th International Conference on Structures in Fire (SiF2020)

Self Cite

View full text Add to dashboard Cite

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Probabilistic Performance-based Fire Design of Structures: A Hazard-Centred and Consequence-Oriented Perspective

Franchini,

Galasso,

Torero

2024

Fire Technol

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Risk-based design and assessment methods are gaining popularity in performance-based structural fire engineering. These methods usually start by defining a set of hazard scenarios to use as analysis inputs. This approach, proven highly effective for other hazard types such as earthquakes, may not be optimal for fire safety design. Indeed, the strong coupling between the fire phenomenon and structural features enables an ad-hoc design variable selection (and/or optimisation) to reduce fire intensity, making fire scenarios additional design outputs. In addition, such a coupling effect implies that fire scenarios maximising consequences are structure specific. Building on these considerations, this paper discusses the limitations that arise at different analysis steps (i.e., fire-scenario and intensity treatment, identifying fire intensity measures, probabilistic fire hazard analysis, developing fire fragility models, and risk calculation) when using conventional risk-based approaches for design purposes. Furthermore, it compares such approaches with a fire safety design methodology (the Consequence-oriented Fire intensity Optimisation, CFO, approach) that addresses the identified limitations. The potential benefits of integrating the two approaches are also discussed. Finally, the fire design of a simplified steel-girder bridge is introduced as an illustrative example, comparing the consequence metrics and design updating strategies resulting from the two approaches.

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State of the Art Methodologies for the Estimation of Fire Costs in Buildings to Support Cost–Benefit Analysis

Unobe,

Lucherini,

et al. 2024

Fire Technol

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A framework for probabilistic fire loss estimation in concrete building structures

Cited by 18 publications

References 36 publications

Lifetime economically optimum position of steel reinforcement in a concrete column exposed to natural fire

Lifetime economically optimum position of steel reinforcement in a concrete column exposed to natural fire

Probabilistic Performance-based Fire Design of Structures: A Hazard-Centred and Consequence-Oriented Perspective

State of the Art Methodologies for the Estimation of Fire Costs in Buildings to Support Cost–Benefit Analysis

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