Finite element analysis of lightweight composite sandwich panels exposed to fire

Upasiri, Irindu; Konthesigha, K.M.C.; Nanayakkara, Sma; Poologanathan, Keerthan; Gatheeshgar, Perampalam; Nuwanthika, Dilini

doi:10.1016/j.jobe.2021.102329

Cited by 5 publications

(16 citation statements)

References 19 publications

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“…The fire resistance and thermal performance of normal weight, light-weight concrete and steel have been analysed significantly, with well-established design guidelines devel-oped for elevated temperatures [27][28][29][30][31][32][33][34]. These studies include the following: a comparative study of the fire behaviour of light-weight and normal concrete composite structures [31]; large-scale experiments conducted to examine the behaviour of concrete elements under standard fire conditions [33]; a study of the effect of raised temperature on concrete bond strength [27]; a numerical analysis of the fire performance of Composite Sandwich Panels (CSP) under standard fire and hydrocarbon fire conditions [28]; an examination of the effect of hydrocarbon fire on high-strength geopolymer concrete wall panels [29]; and a thermal analysis of multi-layer walls [34].…”

Section: Fire Performance Of Construction Materialsmentioning

confidence: 99%

“…For walls containing a cavity, heat transfer through the cavity was modelled considering the heat transfer through radiation. Many studies have concluded that heat transfer in voids is governed by heat transfer through radiation [28,46,63]; therefore, the emissivity value of 0.7 was assigned to the cavity surfaces, and was modelled based on closed cavities in the geometry [62]. For walls filled with insulation material, tie constraints were assigned between the wall and the filling material to model the perfect connection between the two surfaces in the heat transfer process.…”

Section: Heat Transfer Fe Modelmentioning

confidence: 99%

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Finite Element Modelling to Predict the Fire Performance of Bio-Inspired 3D-Printed Concrete Wall Panels Exposed to Realistic Fire

et al. 2022

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Large-scale additive manufacturing (AM), also known as 3D concrete printing, is becoming well-recognized and, therefore, has gained intensive research attention. However, this technology requires appropriate specifications and standard guidelines. Furthermore, the performance of printable concrete in elevated temperature circumstances has not yet been explored extensively. Hence, the authors believe that there is a demand for a set of standardized findings obtained with the support of experiments and numerical modelling of the fire performance of 3D-printed concrete structural elements. In general, fire experiments and simulations focus on ISO 834 standard fire. However, this may not simulate the real fire behaviour of 3D-printed concrete walls. With the aim of bridging this knowledge disparity, this article presents an analysis of the fire performance of 3D-printed concrete walls with biomimetic hollow cross sections exposed to realistic individual fire circumstances. The fire performance of the non-load-bearing 3D-printed concrete wall was identified by developing a suitable numerical heat transfer model. The legitimacy of the developed numerical model was proved by comparing the time–temperature changes with existing results derived from fire experiments on 3D-printed concrete walls. A parametric study of 96 numerical models was consequently performed and included different 3D-printed concrete wall configurations under four fire curves (standard, prolonged, rapid, and hydrocarbon fire). Moreover, 3D-printed concrete walls and mineral wool cavity infilled wall panels showed enhanced fire performance. Moreover, the cellular structures demonstrated superior insulation fire ratings compared to the other configurations.

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Section: Fire Performance Of Construction Materialsmentioning

confidence: 99%

Section: Heat Transfer Fe Modelmentioning

confidence: 99%

Finite Element Modelling to Predict the Fire Performance of Bio-Inspired 3D-Printed Concrete Wall Panels Exposed to Realistic Fire

et al. 2022

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“…, 2020; Keerthan and Mahendran, 2012b; Upasiri et al. , 2021a, b, c). Fire load is defined as a fire flame's time-temperature variation (fire curve) in both experimental and numerical investigations.…”

Section: Introductionmentioning

confidence: 99%

“…FC uses a forming agent to introduce fine air bubbles in the concrete mix to make the structure cellular (Upasiri et al. , 2020, 2021a, b, c). According to the literature (Upasiri et al.…”

Section: Introductionmentioning

confidence: 99%

“…, 2020; European Committee for Standardisation, EN 1991-1-2; American Society for Testing and Materials, 2000; Babrauskas and Willamson, 1978). The hydrocarbon fire curve is another commonly used fire curve representing the fire induced in high fuel loads in fuel sheds and industrial facilities (Upasiri et al. , 2021b, c; European Committee for Standardisation, EN 1991-1-2).…”

Section: Introductionmentioning

confidence: 99%

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Finite element analysis of lightweight concrete-filled LSF walls exposed to realistic design fire

Upasiri

Konthesingha

Nanayakkara

et al. 2022

JSFE

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PurposeLight-Gauge Steel Frame (LSF) structures are popular in building construction due to their lightweight, easy erecting and constructability characteristics. However, due to steel lipped channel sections negative fire performance, cavity insulation materials are utilized in the LSF configuration to enhance its fire performance. The applicability of lightweight concrete filling as cavity insulation in LSF and its effect on the fire performance of LSF are investigated under realistic design fire exposure, and results are compared with standard fire exposure.Design/methodology/approachA Finite Element model (FEM) was developed to simulate the fire performance of Light Gauge Steel Frame (LSF) walls exposed to realistic design fires. The model was developed utilising Abaqus subroutine to incorporate temperature-dependent properties of the material based on the heating and cooling phases of the realistic design fire temperature. The developed model was validated with the available experimental results and incorporated into a parametric study to evaluate the fire performance of conventional LSF walls compared to LSF walls with lightweight concrete filling under standard and realistic fire exposures.FindingsNovel FEM was developed incorporating temperature and phase (heating and cooling) dependent material properties in simulating the fire performance of structures exposed to realistic design fires. The validated FEM was utilised in the parametric study, and results exhibited that the LSF walls with lightweight concrete have shown better fire performance under insulation and load-bearing criteria in Eurocode parametric fire exposure. Foamed Concrete (FC) of 1,000 kg/m3 density showed best fire performance among lightweight concrete filling, followed by FC of 650 kg/m3 and Autoclaved Aerated Concrete (AAC) 600 kg/m3.Research limitations/implicationsThe developed FEM is capable of investigating the insulation and load-bearing fire ratings of LSF walls. However, with the availability of the elevated temperature mechanical properties of the LSF wall, materials developed model could be further extended to simulate the complete fire behaviour.Practical implicationsLSF structures are popular in building construction due to their lightweight, easy erecting and constructability characteristics. However, due to steel-lipped channel sections negative fire performance, cavity insulation materials are utilised in the LSF configuration to enhance its fire performance. The lightweight concrete filling in LSF is a novel idea that could be practically implemented in the construction, which would enhance both fire performance and the mechanical performance of LSF walls.Originality/valueLimited studies have investigated the fire performance of structural elements exposed to realistic design fires. Numerical models developed in those studies have considered a similar approach as models developed to simulate standard fire exposure. However, due to the heating phase and the cooling phase of the realistic design fires, the numerical model should incorporate both temperature and phase (heating and cooling phase) dependent properties, which was incorporated in this study and validated with the experimental results. Further lightweight concrete filling in LSF is a novel technique in which fire performance was investigated in this study.

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Thermal and Structural Behavior of Precast Concrete Sandwich Panels

Jithin¹,

Joseph²

2022

Lecture Notes in Civil Engineering

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Finite element analysis of lightweight composite sandwich panels exposed to fire

Cited by 5 publications

References 19 publications

Finite Element Modelling to Predict the Fire Performance of Bio-Inspired 3D-Printed Concrete Wall Panels Exposed to Realistic Fire

Finite Element Modelling to Predict the Fire Performance of Bio-Inspired 3D-Printed Concrete Wall Panels Exposed to Realistic Fire

Finite element analysis of lightweight concrete-filled LSF walls exposed to realistic design fire

Thermal and Structural Behavior of Precast Concrete Sandwich Panels

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