Fire performance of cold, warm and hybrid LSF wall panels using numerical studies

Perera, Dilini; Poologanathan, Keerthan; Gillie, Martin; Gatheeshgar, Perampalam; Sherlock, P.; Nanayakkara, Sma; Konthesingha, K. M. C.

doi:10.1016/j.tws.2020.107109

Cited by 21 publications

(45 citation statements)

References 29 publications

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“…Ariyanayagam and Mahendran [41] also investigated the impact of cavity insulation on the fire resistance of LSF walls and found that the use of cavity insulation enhanced the FRL of non-load-bearing walls, although it considerably reduced that of load-bearing walls. In addition, experimental analyses of non-load-bearing LSF walls in standard fire conditions [42][43][44] and a large variety of fire performance data for LSF walls, obtained using finite element analysis (FEA) [45][46][47][48][49], are available for steel structures.…”

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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“…OSB panel (10 mm) of the Model 01 was replaced with the 15 mm plasterboard in Model 02 to determine the effect of plasterboard and OSB in the thermal performance of LSF. OSB panels are considered to be crucial in load-bearing and stability walls because they provide additional resistance to horizontal lateral loads; hence it is important to examine the effect of OSB replacing the plasterboard in LSF wall systems [35]. Model 03 and Model 04 configurations are similar to Model 01 and Model 02, respectively; however, 20 mm of VIP was introduced to the wall panel just after the steel stud on the external side to investigate the effect of the VIP panel on the thermal performance of the LSF wall system.…”

Section: Parametric Studymentioning

confidence: 99%

Thermal Performance of LSF Wall Systems with Vacuum Insulation Panels

et al. 2021

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Lightweight Steel Frames (LSF) in building construction are becoming more popular due to their fast, clean, and flexible constructability. Typical LSF wall panels are made of cold-formed and thin-walled steel lipped channel studs with plasterboard linings. Due to the high thermal conductivity of steel, these LSF components must be well engineered and covered against unintended thermal bridges. Therefore, it is essential to investigate the heat transfer of the LSF wall of different configurations and reduce heat loss through walls by lowering the thermal transmittance, which would ultimately minimise the energy consumption in buildings. The effect of novel thermal insulation material, Vacuum Insulation Panels (VIP), their position on the LSF wall configuration, and Oriented Strand Board (OSB) and plasterboard’s effect on the thermal transmittance of LSF walls were investigated through numerical analysis. A total of 56 wall configurations and 112 finite element models were analysed and compared with the minimum U-value requirements of UK building regulations. Numerical model results exhibited that using plasterboards instead of OSB has no considerable effect on the U-value of the LSF walls. However, 77% (4 times) of U-value reduction was exhibited by introducing the 20 mm VIP. Moreover, the position of the VIP to the U-value of LSF was negligible. Based on the results, optimum LSF wall configurations were proposed by highlighting the construction methods. Additionally, this study, through literature, seeks to identify other areas in which additional research can be conducted to achieve the desired thermal efficiency of buildings using LSF wall systems.

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“…Light-Gauge Steel Frame (LSF) wall systems are popular in building construction due to their lightweight, easy erection and overall structural, energy and fire performance (Perera et al. , 2020; Gunalan et al.…”

Section: Introductionmentioning

confidence: 99%

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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Fire performance of cold, warm and hybrid LSF wall panels using numerical studies

Cited by 21 publications

References 29 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

Thermal Performance of LSF Wall Systems with Vacuum Insulation Panels

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

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