Behaviour of Reinforced Concrete Walls Under Fire: A Review

Almeshal, Ibrahim; Bakar, B.H. Abu; Tayeh, Bassam A.

doi:10.1007/s10694-022-01240-3

Cited by 18 publications

(7 citation statements)

References 81 publications

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“…Research efforts on the evaluation of the response of RC structures under fire loading are gaining attention in recent years (Almeshal and Bakar (2022); Buttignol and Bittencourt (2021); Jiang et al (2021); Ni and Gernay (2021a); Pires et al (2020); Udi et al (2022)), including employing a probabilistic approach (De Souza et al, 2019; Eamon and Jensen, 2013a, 2013b, Gernay et al, 2019b, Ni and Gernay, 2021b, Roy and Matsagar, 2022, Shi et al, 2013, Thienpont et al, 2021, Van Coile et al, 2013a, 2016). Some studies consider the variation of thermal parameters (e.g.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic investigation of reinforced concrete structures under fire loading accounting for material and geometric uncertainties

Sosso

Berke

2023

Advances in Structural Engineering

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The sensitivity of the structural response to variations of material and cross sectional geometrical parameters is investigated for reinforced concrete structures under fire loading. A relatively low cost 2D corotational layered beam finite element is employed in a reduced latin hypercube sampling framework for this purpose. The structural response is assessed in terms of vertical deflection versus time, failure time and cross sectional stress/strain distribution using standard fire curves. The numerical models represent experimentally tested cases in the literature and operate with experimentally derived parameter sets, when possible. A minimum set of three RVs, the bottom concrete cover thickness, steel and concrete yield stregths, out of the initial full set of 12 are identified that drastically reduces the number of RVs and thus the stochastic computation’s cost, while keeping a reasonable envelop for the results. The relationship between structural behavior, material degradation and data extracted from the cross sectional behavior is also successfully established and used to explain why the random set can be reduced to three parameters.

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Section: Introductionmentioning

confidence: 99%

Probabilistic investigation of reinforced concrete structures under fire loading accounting for material and geometric uncertainties

Sosso

Berke

2023

Advances in Structural Engineering

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“…However, the surviving structures may have irreparable damage (Ahmed et al, 2022; Jiang et al, 2018; Song et al, 2020). Therefore, the post-fire performance of concrete structures needs to be investigated to determine whether the structures can continue to be used after a fire (Almeshal et al, 2022; Ni and Birely, 2018; Liu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on post-fire behaviour of a novel assembled wall-slab joint

Shen

et al. 2023

Advances in Structural Engineering

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In this study, the post-fire behaviour of a novel assembled wall-slab joint with high-performance concrete (HPC) post-casted in the core area was experimentally investigated. Fire and post-fire monotonic static loading tests were performed on three full-scale specimens, including two assembled joints and one cast-in-place joint for comparison. The temperature distribution inside the joints exposed to fire, failure displacement and failure mode of the joints after a fire, and residual bearing capacity of the joints are discussed. The results show that the assembled wall-slab joints are more integral than the cast-in-place joints after a fire. In addition, HPC can effectively reduce the temperature in the core area of an assembled joint exposed to fire and improve its post-fire stiffness. The failure modes of the two types of joints were also different. The residual bearing capacity of the assembled wall-slab joint after 1.5 h of heating was approximately 22.3% lower than after 1 h of heating. In addition, the residual bearing capacity of the assembled wall-slab joint was approximately 28% larger than that of the cast-in-place wall-slab joint at the same heating time of 1.5 h. In general, the assembled wall-slab joint showed better performance than the cast-in-place joint both during and after a fire.

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“…The heat resistance of traditional concrete is significantly influenced by the type of aggregate and binder used in its mix design. This is because of the heat and duration of the fire, the extent of the structural component, and the moisture content of traditional concrete [4,[8][9][10]. Color changes, cracks, and spalling are the first signs of heat-damaged concrete [11].…”

Section: Introductionmentioning

confidence: 99%

The role of chemistry and fineness of metakaolin on the fresh properties and heat resistance of blended fly ash-based geopolymer

et al. 2023

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Sensible thermal energy storage using concrete as a storage medium is a promising technology that helps minimize energy in power plant. The purpose of this study is to evaluate the potential benefits of metakaolin (MK) as a partial substitute for fly ash-based geopolymer for heat resistance. As a partial substitute (5 and 20 wt.%) for fly ash (FA), nine metakaolins containing different alumina contents were selected. In order to assess their potential for storing high-temperature thermal energy, physical and microstructural analyses were performed before and after heat exposure up to 500 °C. Low packing density limits the workability of some metakaolins and increases water demand in pastes. The mechanical properties of geopolymer weaken as the temperature is raised (< 500 °C). The high alumina content of some metakaolins, however, helps to mitigate strength loss during high temperatures. A higher dosage of metakaolin has also shown to prevent this deterioration of strength. A reduction in strength under heating is caused by both dehydration and dehydroxylation. The higher fineness and alumina content of MK have demonstrated significant potential to enhance the heat resistance of FA-based geopolymers. As a result, the geopolymer paste developed is suitable for being used in heat-resistant applications.Article Highlights Fly ash was the main precursor of as prepared alkali-activated binders. Adding metakaolin enhances the resistance of hardened materials under thermal load. The higher the alumina content inside metakaolin is, the higher the performance is.

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Behaviour of Reinforced Concrete Walls Under Fire: A Review

Cited by 18 publications

References 81 publications

Probabilistic investigation of reinforced concrete structures under fire loading accounting for material and geometric uncertainties

Probabilistic investigation of reinforced concrete structures under fire loading accounting for material and geometric uncertainties

Experimental study on post-fire behaviour of a novel assembled wall-slab joint

The role of chemistry and fineness of metakaolin on the fresh properties and heat resistance of blended fly ash-based geopolymer

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