A Graphical Method for Fire Design of Reinforced Concrete Beams

Albuquerque, G.; Silva, Valdir P.; Rodrigues, João Paulo C.

doi:10.1007/s10694-021-01167-1

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…Apart from the issue of end restraint, RC beams in fire have also been studied with the goal of accounting for loss in performance (moment, shear, etc) resistance at elevated temperatures. Albuquerque et al [24] introduced a graphical method for fire design of RC beams using the Temperature Calculation and Design (TCD) software. The developed graphs present design solutions for more than 2300 T-beams that have proven to be more economical than traditional prescriptive (tabular) methods.…”

Section: Literature Reviewmentioning

confidence: 99%

Enhancing fire resistance of reinforced concrete beams through sacrificial reinforcement

Hostetter

Naser

Hawileh

et al. 2022

Archit. Struct. Constr.

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Due to the superior properties of concrete, structural members made of concrete often satisfy fire requirements specified in codes and standards without special installations or the use of external insulation. A closer examination into fire codal provisions shows that they are primarily founded for new constructions or that which does not suffer from aging or in-service trauma; such as cracking, reinforcement corrosion, creep, etc., all of which can adversely affect the structural response of concrete structures, especially under fire conditions. In order to enhance the fire resistance of concrete structures, this paper presents insights into simple and cost-effective solutions by utilizing sacrificial layer(s) of reinforcement. These solutions capitalize on the natural synergy between reinforcement and concrete and have the potential to mitigate fire-induced cracking and the development of fire-induced large deformation, thereby extending the fire resistance of reinforced concrete beams. The validity and applicability of the proposed concepts are highlighted through a highly complex three-dimensional thermomechanical nonlinear-based finite element model. This model was utilized in a series of parametric studies to examine critical parameters influencing the fire response of concrete beams reinforced with steel and fiber-reinforced polymer reinforcement. These parameters include sacrificial reinforcement scheme, size, and material type. It was concluded that the use of sacrificial reinforcement could be beneficial for mitigation purposes or as a repair solution for postfire events.

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Section: Literature Reviewmentioning

confidence: 99%

Enhancing fire resistance of reinforced concrete beams through sacrificial reinforcement

Hostetter

Naser

Hawileh

et al. 2022

Archit. Struct. Constr.

View full text Add to dashboard Cite

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Development and testing of a thermal self-straining preloading test setup for reinforced concrete beams and slabs to perform thermomechanical action

Vishal,

Satyanarayanan,

Prakash

et al. 2024

IJSI

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PurposeAt this moment, there is substantial anxiety surrounding the fire safety of huge reinforced concrete (RC) constructions. The limitations enforced by test facilities, technology, and high costs have significantly limited both full-scale and scaled-down structural fire experiments. The behavior of an individual structural component can have an impact on the entire structural system when it is connected to it. This paper addresses the development and testing of a self-straining preloading setup that is used to perform thermomechanical action in RC beams and slabs.Design/methodology/approachThermomechanical action is a combination of both structural loads and a high-temperature effect. Buildings undergo thermomechanical action when it is exposed to fire. RC beams and slabs are one of the predominant structural members. The conventional method of testing the beams and slabs under high temperatures will be performed by heating the specimens separately under the desired temperature, and then mechanical loading will be performed. This gives the residual strength of the beams and slabs under high temperatures. This method does not show the real-time behavior of the element under fire. In real-time, a fire occurs simultaneously when the structure is subjected to desired loads and this condition is called thermomechanical action. To satisfy this condition, a unique self-training test setup was prepared. The setup is based on the concept of a prestressing condition where the load is applied through the bolts.FindingsTo validate the test setup, two RC beams and slabs were used. The test setup was tested in service load range and a temperature of 300 °C. One of the beams and slabs was tested conventionally with four-point bending and point loading on the slab, and another beam and slab were tested using the preloading setup. The results indicate the successful operation of the developed self-strain preloading setup under thermomechanical action.Research limitations/implicationsGaining insight into the unpredictable reaction of structural systems to fire is crucial for designing resilient structures that can withstand disasters. However, comprehending the instantaneous behavior might be a daunting undertaking as it necessitates extensive testing resources. Therefore, a thorough quantitative and qualitative numerical analysis could effectively evaluate the significance of this research.Originality/valueThe study was performed to validate the thermomechanical load setup for beams and slabs on a single-bay single-storey RC frame with and without slab under various fire possible scenarios. The thermomechanical load setup for RC members is found to be scarce.

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A Graphical Method for Fire Design of Reinforced Concrete Beams

Cited by 2 publications

References 29 publications

Enhancing fire resistance of reinforced concrete beams through sacrificial reinforcement

Enhancing fire resistance of reinforced concrete beams through sacrificial reinforcement

Development and testing of a thermal self-straining preloading test setup for reinforced concrete beams and slabs to perform thermomechanical action

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