Reliability studies on RC beams exposed to fire based on IS456:2000 design methods

Balaji, Aneesha; Aathira, M.S.; Pillai, T. M. Madhavan; Nagarajan, Praveen

doi:10.12989/sem.2016.59.5.853

Cited by 7 publications

(7 citation statements)

References 8 publications

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“…4.1 Failure mode Aneesha Balaji et al (2016) point out the importance of reinforcement yield strength for the shear limit state, and highlight the importance of considering the possibility of shear failure.…”

Section: Discussionmentioning

confidence: 99%

“…With respect to the probabilistic description of the stochastic variables, a great variability in the types of (1) distribution, (2) mean values and (3) correlation coefficients is noticeable. An example is the values related to the correlation coefficient of concrete strength used by Aneesha Balaji et al (2016) and Van Coile et al (2011), with 41% of difference. This highlights that the probabilistic models for RC concrete beams exposed to fire are not fully consolidated in the literature and require further investigation.…”

Section: Stochastic Variables and Uncertainties In The Modelsmentioning

confidence: 99%

“…On one hand, it is clear that over the years, studies tend to consider both parameters (fire resistance and severity) in a probabilistic way, bringing a more realistic assessment. About this, only the research developed by Hosser et al (1995Hosser et al ( , 2008, Eamon and Jensen (2013) and Aneesha Balaji et al (2016) treated both of them in a probabilistic way. It is important to mention that the study conducted by Aneesha Balaji et al is closely related to the one conducted by Eamon and Jensen, with regard to the methodologies and statistical values of the variables involved.…”

Section: Fire Severity and Resistancementioning

confidence: 99%

“…The effect of various parameters such as effective cover, yield strength of steel, grade of concrete, distribution of reinforcement bars and aggregate type on reliability indices are studied. Effective cover of concrete and yield strength of steel are found to have a significant effect on reliability of beams (Aneesha Balaji et al. , 2016).…”

Section: State-of-the-art Reviewmentioning

confidence: 99%

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State-of-the-art review of the reliability evaluation of concrete beams exposed to fire

Coelho

Diniz²,

Rodrigues³

et al. 2022

JSFE

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PurposeThis paper aims to investigate the state of the art for the reliability evaluation of reinforced concrete beams in a fire situation. Special emphasis is placed on addressing which parameters were considered probabilistically or deterministically, the prescribed probabilistic models for the assumed stochastic variables, the treatment of the heat transfer mechanism, the quantification of the structural fire performance and the assumed target reliability levels.Design/methodology/approachResearch papers were identified through a search on the Web of Science, Google Scholar and detailed searches within the journals Journal of Structural Fire Engineering, Fire Technology and Fire Safety Journal, supplemented with references known by the authors.FindingsConsidering the state-of-the-art review, gaps in the literature are identified related to (1) the probabilistic evaluation of shear capacity for standard fires and parametric fires, and bending capacity for parametric fires, (2) the absence of reference fragility curves for immediate design application/code calibration and (3) the specification of target safety levels for reliability-based design.Originality/valueThe lack of research papers gathering studies on the reliability of reinforced concrete beams in fire situation makes it difficult to further develop research in the area. The value of this work lies precisely in the collection of the basic information, making it possible to identify gaps to be addressed in future research and the suggestion of a research framework.

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Section: Discussionmentioning

confidence: 99%

Section: Stochastic Variables and Uncertainties In The Modelsmentioning

confidence: 99%

Section: Fire Severity and Resistancementioning

confidence: 99%

Section: State-of-the-art Reviewmentioning

confidence: 99%

See 2 more Smart Citations

State-of-the-art review of the reliability evaluation of concrete beams exposed to fire

Coelho

Diniz²,

Rodrigues³

et al. 2022

JSFE

View full text Add to dashboard Cite

show abstract

“…The probabilistic frameworks are useful as the process involved from development of fire to required mitigation techniques involve a complex approach that includes structural fire resistance, fire mitigation system and protective measures for human life and property. Such complexities allow probabilistic frameworks to identify the importance of uncertainties and variabilities to evaluate the performance of structural systems exposed to catastrophic fire, which is almost inaccessible under the lesser rational deterministic methods (Balaji et al, 2016). Moreover, the fire models in the design guidelines are unable to provide the required confidence level for achieving desired structural performance exposed to fire (ElMohandes and Vecchio, 2016), which necessitated adopting the probabilistic approaches to investigate the fire performance for structural fire safety.…”

Section: Introductionmentioning

confidence: 99%

Member and structural fragility of reinforced concrete structure under fire

Chaudhary

Roy

Matsagar

2020

JSFE

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Purpose Despite recognizing the significance of risk-based frameworks in fire safety engineering, the usual approach in structural fire design is largely member/component level, wherein effect of uncertainties influencing the fire resistance of structures are not explicitly considered. In this context, a probabilistic framework is presented to investigate the vulnerability of a reinforced concrete (RC) members and structure under fire loading scenario. Design/methodology/approach The RC structures exposed to fire are modeled in a finite element (FE) platform incorporating material and geometric nonlinearity, in which the transient thermo-mechanical analysis is carried out by suitably incorporating the temperature variation of thermal and mechanical properties of both concrete and steel rebar. The stochasticity in the system is considered in structural resistance, thermal and fire model parameters, and the subsequent fragility curves are developed considering threshold limit state of deflection. Findings The fire resistance of RC structure is reported to be significantly lower in comparison to the RC members, thereby illustrating the current prescriptive design approaches based on studies of structural member behavior to be crucial from a safety and reliability point of view. Practical implications The framework developed for the vulnerability assessment of RC structures under fire hazard through FE analysis can be effectively used to estimate the structural fire resistance for other similar structure to enhance safety and reliability of structures under such extreme threats. Originality/value The paper proposes a novel methodology for vulnerability assessment of three-dimensional RC structures under fire hazard through FE analysis and provides comparison of the structural fragility with fragility developed for structural members. Moreover, the research emphasizes to assume 3D behavior of the structure rather than the approximate 2D behavior.

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Fire effect of steel bridge structure with consideration of leaked combustion fuel on asphalt bridge deck

Li,

Wang,

Wang

et al. 2024

Case Studies in Thermal Engineering

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Reliability studies on RC beams exposed to fire based on IS456:2000 design methods

Cited by 7 publications

References 8 publications

State-of-the-art review of the reliability evaluation of concrete beams exposed to fire

State-of-the-art review of the reliability evaluation of concrete beams exposed to fire

Member and structural fragility of reinforced concrete structure under fire

Fire effect of steel bridge structure with consideration of leaked combustion fuel on asphalt bridge deck

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