Fire Behaviour of GFRP-Reinforced Concrete Slab Strips: Fire Resistance Tests and Numerical Simulation

Duarte, A.P.C.; Rosa, Inês C.; Arruda, M.R.T.; Firmo, João P.; Correia, João R.

doi:10.1007/978-3-030-88166-5_68

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…The robust fire resistance observed in GFRP-strengthened RC beams can be attributed to the substantial concrete cover of 70 mm [ 31 ]. This aligns with findings from various literature reviews and theoretical studies [ 177 , 178 , 179 , 180 , 181 ]. The critical comparison and rankings between steel and FRP, especially their practicality and durability characteristics, are summarized in Table 9 .…”

Section: Functional Propertiessupporting

confidence: 90%

A State-of-the-Art Review on Structural Strengthening Techniques with FRPs: Effectiveness, Shortcomings, and Future Research Directions

Hammad,

Bahrami,

Khokhar

et al. 2024

Materials

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In the pursuit of creating more sustainable and resilient structures, the exploration of construction materials and strengthening methodologies is imperative. Traditional methods of relying on steel for strengthening proved to be uneconomical and unsustainable, prompting the investigation of innovative composites. Fiber-reinforced polymers (FRPs), known for their lightweight and high-strength properties, gained prominence among structural engineers in the 1980s. This period saw the development of novel approaches, such as near-surface mounted and externally bonded reinforcement, for strengthening of concrete structures using FRPs. In recent decades, additional methods, including surface curvilinearization and external prestressing, have been discovered, demonstrating significant additional benefits. While these techniques have shown the enhanced performance, their full potential remains untapped. This article presents a comprehensive review of current approaches employed in the fortification of reinforced cement concrete structures using FRPs. It concludes by identifying key areas that warrant in-depth research to establish a sustainable methodology for structural strengthening, positioning FRPs as an effective replacement for conventional retrofitting materials. This review aims to contribute to the ongoing discourse on modern structural strengthening strategies, highlight the properties of FRPs, and propose avenues for future research in this dynamic field.

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Section: Functional Propertiessupporting

confidence: 90%

A State-of-the-Art Review on Structural Strengthening Techniques with FRPs: Effectiveness, Shortcomings, and Future Research Directions

Hammad,

Bahrami,

Khokhar

et al. 2024

Materials

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show abstract

“…This study is only comprised of a thermal analysis, in which the maximum allowed temperature in the GFRP is compared, meaning the results extrapolated for the mechanical analysis are only an approximation. Moreover, the efficiency of the interface between the GFRP and the concrete was not taken into account, and some recent studies [29,42] have suggested that the connection between GFRP and concrete is almost neglected above 150 • C. For this reason, the idea of using LC can promote a more robust solution in hybrid GFRP-concrete structures when subjected to the action of a nominal interior fire. In addition, these cover geometries are only valid for fire in the interior of the building; for external fires or wildfires, extra research may be needed.…”

Section: Limitations Of the Studymentioning

confidence: 99%

Thermal Insulation of Hybrid GFRP-Lightweight Concrete Structures

Arruda¹,

Cantor²,

Bicelli³

2023

CivilEng

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This paper presents a numerical study on the thermal effect of the insulation of lightweight concrete in hybrid GFRP-concrete structures. In these hybrid structures, the GFRP profiles are totally covered by normal and lightweight concrete and subjected to thermal loads. The problem with GFRP structures is their weak thermal resistance, even at moderately high temperatures. To promote some thermal insulation, it is recommended to cover the GFRP profile with concrete, but this increases its weight. Therefore, lightweight concrete may be a good solution due to its insulation capabilities. For this study, the thermal loads used in the numerical campaign are based on a nominal fire-curved ISO-834, and the temperature is measured at several points. Using these temperatures, it is possible to conclude that the effect of lightweight concrete may provide structural benefits when compared with classical standard structural concrete for covering GFRP profiles using different cover values (from 5.0 cm to 2.5 cm). For this work, commercial finite element software was used for the thermal nonlinear analysis. It was possible to conclude that with lightweight concrete, it is likely to have half of the cover and still maintain the same level of insulation as regular concrete.

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“…Gunjal and Kondraivendhan [25] used calcined clay-limestone cement to prepare concrete, compared it with concrete using ordinary portland cement of grade 53, and tested its physical and chemical properties, the attained results showed that, the compressive strength decreased after the temperature rose to 200°C and significant losses occurred after 400°C, then noticeable minute cracks started to appear on the surface of the cube specimens. Duarte et al [26] experimented on the fire behaviour of GFRP-reinforced concrete slab strips and performed numerical investigations. The researchers tested the fire resistance of four concrete slab strips reinforced with sand-coated GFRP bars in a four-point bending configuration, the specimens were subjected to a sustained service load and their bottom surface was exposed to the ISO 834 fire curve.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties and Fire Resistance of Cement Base Material for Road Pavement Based on Finite Element Analysis

Ma¹

2023

IJHT

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The physical and chemical properties of cement base material for road pavement will undergo changes in high temperature environment, so improving the high temperature resistance and fire resistance of cement base material is very important for reducing the loss of road projects caused by high temperature. In actual engineering projects, maintenance measures are often adopted to repair the damaged components so that the roads could be used continuously, however, research on the thermal properties and fire resistance of cement base components of road pavement is insufficient, therefore, in view of this blank, this paper aims to study the thermal properties and fire resistance of road cement base material based on finite element analysis. At first, this paper measured the temperature inside the road cement base during the process of environmental thermal fatigue, analyzed the law of the response of cement base to the temperature changes under the action of relative humidity in the micro environment, and figured out the delay time of such response and the changes of internal temperature gradient. Then, this paper selected proper thermal parameters of road cement material and the stress-strain relationship under compression or tension in high temperature environment, and used the software Python to perform finite element analysis on the fire resistance of road cement base specimens. At last, the corresponding experimental results were given and the validity of the constructed model was verified.

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Fire Behaviour of GFRP-Reinforced Concrete Slab Strips: Fire Resistance Tests and Numerical Simulation

Cited by 3 publications

References 11 publications

A State-of-the-Art Review on Structural Strengthening Techniques with FRPs: Effectiveness, Shortcomings, and Future Research Directions

A State-of-the-Art Review on Structural Strengthening Techniques with FRPs: Effectiveness, Shortcomings, and Future Research Directions

Thermal Insulation of Hybrid GFRP-Lightweight Concrete Structures

Thermal Properties and Fire Resistance of Cement Base Material for Road Pavement Based on Finite Element Analysis

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