Predicting the fire performance of LSF walls made of web stiffened channel sections

Dias, Yomal; Poologanathan, Keerthan; Mahendran, Mahen

doi:10.1016/j.engstruct.2018.04.072

Cited by 28 publications

(7 citation statements)

References 17 publications

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“…As this study investigates the fire behaviour of 3DPC non-load bearing walls with and without cavity insulation under various fire circumstances, thermal properties of the Rockwool material is also described under this section. Figure 7 illustrates the thermal conductivity variation of Rockwool insulation material which is derived from the study by Dias et al (2018). The constant density and specific heat values of Rockwool at elevated temperatures are 100 kg/m 3 and 840 J/kg.°C, respectively (Keerthan and Mahendran, 2012).…”

Section: Development Of Finite Element Modelmentioning

confidence: 99%

Fire resistance of 3D printed concrete composite wall panels exposed to various fire scenarios

Suntharalingam

Upasiri

Gatheeshgar

et al. 2021

JSFE

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Purpose Fire safety of a building is becoming a prominent consideration due to the recent fire accidents and the consequences in terms of loss of life and property damage. ISO 834 standard fire test regulation and simulation cannot be applied to assess the fire performance of 3D printed concrete (3DPC) walls as the real fire time-temperature curves could be more severe, compared to standard fire curve, in terms of the maximum temperature and the time to reach that maximum temperature. Therefore, this paper aims to describe an investigation on the fire performance of 3DPC composite wall panels subjected to different fire scenarios. Design/methodology/approach The fire performance of 3DPC wall was traced through developing an appropriate heat transfer numerical model. The validity of the developed numerical model was confirmed by comparing the time-temperature profiles with available fire test results of 3DPC walls. A detailed parametric study of 140 numerical models were, subsequently, conducted covering different 3DPC wall configurations (i.e. solid, cavity and rockwool infilled cavity), five varying densities and consideration of four fire curves (i.e. standard, hydrocarbon fire, rapid and prolong). Findings 3DPC walls and Rockwool infilled cavity walls showed superior fire performance. Furthermore, the study indicates that the thermal responses of 3DPC walls exposed to rapid-fire is crucial compared to other fire scenarios. Research limitations/implications To investigate the thermal behaviour, ABAQUS allows performing uncoupled and coupled thermal analysis. Coupled analysis is typically used to investigate combined mechanical-thermal behaviour. Since, considered 3DPC wall configurations are non-load bearing, uncouple heat transfer analysis was performed. Time-temperature variations can be obtained to study the thermal response of 3DPC walls. Originality/value At present, there is limited study to analyse the behaviour of 3DPC composite wall panels in real fire scenarios. Hence, this paper presents an investigation on the fire performance of 3DPC composite wall panels subjected to different fire scenarios. This research is the first attempt to extensively study the fire performance of non-load bearing 3DPC walls.

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Section: Development Of Finite Element Modelmentioning

confidence: 99%

Fire resistance of 3D printed concrete composite wall panels exposed to various fire scenarios

Suntharalingam

Upasiri

Gatheeshgar

et al. 2021

JSFE

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“…Figure 7-Figure 9 contains the elevated temperature Specific Heat, Thermal Conductivity and Density variation over temperature for Gypsum boards. Furthermore, the thermal properties of Rockwool are given in Dias's work [14]. Specific Heat of Rockwool is given as 840 J/ (kg.…”

Section: Elevated Temperature Thermal Propertiesmentioning

confidence: 99%

“…Specific Heat of Rockwool is given as 840 J/ (kg. 0 C), where the density of Rockwool is 100 kg / m 3 [14]. The thermal conductivity of rockwool has a variation over temperature which is shown in Figure 10.…”

Section: Elevated Temperature Thermal Propertiesmentioning

confidence: 99%

“…Therefore, convection and conduction mode heat transfer inside the cavity could be reasonably neglected Thin-Walled Structures with respect to the heat transfer caused by cavity radiation. The same concept has been practiced in previous research studies [14,18,32] which have been able to accurately simulate the experimental structural fire tests on LSF wall panels.…”

Section: Numerical Modelsmentioning

confidence: 99%

“…Moreover, the fire performance of LSF wall panels has been studied with innovative steel studs by Dias et al. [14,15], who showed that a new web stiffened channel section performs better when considering ambient and fire conditions. Also, Rusthi et al [16] experimented with two types of MgO boards in the LSF wall panel, where all three tested wall panels had been failed in the integrity criterion.…”

Section: Thin-walled Structures 1 Introductionmentioning

confidence: 99%

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

Perera

Poologanathan

Gillie

et al. 2020

Thin-Walled Structures

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Robust and pre-fabrication construction techniques are the cutting edge practice in the building industry. Cold-frame, warm-frame and hybrid-frame are three common Light-gauge Steel Frame (LSF) wall constructions applied for better energy performance. Still, the applications of the aforementioned wall configurations are restricted due to limited fire safety studies. This paper presents the fire performance investigations and results of cold-frame, warm-frame, and hybrid frame LSF walls together with three novel configurations maintaining the same material quantities. Successfully validated 3D heat transfer finite element models were extended to six wall configurations. Time variant temperature profiles from Finite Element Analyses were evaluated against the established Load Ratio (LR)-Hot-Flange (HF) temperature curve to determine the structural fire resistance. Modified warm-frame construction showed the best performance where the Fire Resistance Level (FRL) is approximately twice that of conventional LSF wall configurations. Hence, the novel LSF wall configurations obtained by shifting the insulation material toward the fireside of the wall make efficient fire-resistant wall solutions and the new designs are proposed to be incorporated in modular constructions for enhanced fire performance.

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10.12: Numerical modelling of steel sheathed LSF walls under fire conditions

2017

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Fire performance of light gauge steel framed (LSF) walls sheathed with gypsum plasterboards has been investigated using experimental and numerical studies by many researchers in the past. Provision of cavity or external insulation, improving the thermal-mechanical properties of plasterboard, and changing the stud geometry are several options previously employed to enhance the Fire Resistance Level (FRL) of such wall systems. Past studies of steel sheathed cold-formed steel (CFS) framed walls have shown that the use of steel sheathing improves the shear strength of LSF walls. However, such studies have not investigated the possible improvements to the fire performance of LSF walls due to the use of steel sheathing in addition to plasterboards. This numerical study investigates the thermal performance of three common LSF wall configurations sheathed with steel sheets on both sides under fire conditions. Three steel sheathing configurations (internal and/or external sheathing) were considered for each LSF wall. Thermal Finite Element (FE) models were developed and used to simulate the heat progression across the walls, following validation using previous experimental studies. The walls were exposed to ISO 834-1 standard fire curve on one side. Results were then compared with those from LSF walls sheathed only with plasterboards. Internal steel sheathing was found to be capable of reducing the ambient side temperatures compared to plasterboard only walls due to the lower emissivity of steel, whereas external steel sheathing increased them further. Although the stud hot flange (HF) temperatures are generally increased with the addition of steel sheets, provision of back-blocking was able to eliminate this deficiency. A novel arrangement is proposed for back-blocking which is found to significantly delay the stud temperature rise and improve the FRL. The use of corrugated steel sheet profiles is found to reduce both the stud and ambient side plasterboard temperatures. The results from this study give useful information to develop load bearing and non-load bearing LSF walls with superior fire performance. This paper presents the details of this numerical study and the results.

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Predicting the fire performance of LSF walls made of web stiffened channel sections

Cited by 28 publications

References 17 publications

Fire resistance of 3D printed concrete composite wall panels exposed to various fire scenarios

Fire resistance of 3D printed concrete composite wall panels exposed to various fire scenarios

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

10.12: Numerical modelling of steel sheathed LSF walls under fire conditions

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