Elevated temperature thermal properties of carbon steels used in cold-formed light gauge steel frame systems

Steau, Edward; Mahendran, Mahen; Poologanathan, Keerthan

doi:10.1016/j.jobe.2019.101074

Cited by 22 publications

(11 citation statements)

References 10 publications

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“…The thermal properties of materials have been studied widely in recent years [30][31][32][33]. Different materials react to the application of heat differently, but their response can be measured according to the functional characteristics of temperature or heat [34].…”

Section: Introductionmentioning

confidence: 99%

Influence of Polypropylene, Glass and Steel Fiber on the Thermal Properties of Concrete

et al. 2021

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The variety of approaches to tackle climate change reflects the size of this global problem. No technology will act as a panacea to cure the greenhouse gas emissions problem, but new building materials with byproducts or even wastes have the potential to play a major role in reducing the environmental impacts of the building sector. In this study, three potential solutions of concrete with dispersed reinforcement in the form of recycled fibers (polypropylene, glass and steel) were examined. The aim is to present a detailed analysis of the thermal properties of new building materials in an experimental approach. Concrete mixtures were prepared according to a new, laboratory-calculated recipe containing granite aggregate, a polycarboxylate-based deflocculant, Portland cement (52.5 MPa) and fibers. This experimental work involved three different contents of each fiber (0.5%, 0.75% and 1.0 wt.%), and all tests were carried after the complete curing cycle of concrete (28 days).

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Section: Introductionmentioning

confidence: 99%

Influence of Polypropylene, Glass and Steel Fiber on the Thermal Properties of Concrete

et al. 2021

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“…In terms of steel material, Steau et al [35] presented the thermal properties of carbon steels, which are generally used in cold-formed LSF (light-gauge steel) frame systems. In addition, Gunalan and Mahendran [36] predicted the fire-resistance levels (FRL) of cold-formed steel wall panels to LSF standard fire.…”

Section: Fire Performance Of Construction Materialsmentioning

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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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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“…According to the Steel Structure Design Standard, the top and lower of cold-formed light-gauge steel studs are pasted with sheathing boards to prevent the lateral deformation of the light-gauge steel studs, so the overall bending or buckling of the wall is not considered. In the elastic stage, the bending normal stress equation of the top and lower flange of light-gauge steel studs with simple supports at both ends of LSF wall panels under distribution load can be obtained, as shown in Equation (33).…”

Section: Calculation Of Elastic Bending Normal Stress Of Longitudinal...mentioning

confidence: 99%

“…The structural sealant can also be manufactured quickly in industrial production because it is easy to use. It is worth noticing that although cold-formed steel has good elevated temperature performance [27][28][29] and fire resistance [30][31][32][33], structural sealant exhibits poor fire resistance [34,35], which may cause poor fire resistance of the LSF wall if the structural sealant is used for connecting the sheathing board with the light-gauge steel stud. The phenolic fireproof board is a composite material made of phenolic resin, flame retardant, curing agent, and other substances; it has excellent fireproof performance, thermal insulation performance, and high strength.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Prefabricated Cold-Formed Steel Stud Wall Panels Sheathed with Fireproof Phenolic Boards under Out-of-Plane Loading

et al. 2022

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In this paper, new prefabricated cold-formed light-gauge steel stud wall panels sheathed with fireproof phenolic boards, which are fabricated by connecting the steel studs and the boards by using structural silicone sealant, was proposed. The proposed prefabricated wall has a good fireproof performance and can be manufactured rapidly in a factory. Full-scale tests on the mechanical properties of the prefabricated wall system, consisting of the prefabricated wall and the connection between the wall and the surrounding steel structure under out-of-plane loading, were performed. A total of six specimens were tested considering the effects of the arrangement of the cold-formed light-gauge steel studs, the shape and thickness of the steel connector for jointing the prefabricated wall panel and the surrounding steel structure, and the number of self-tapping screws connecting the surrounding structure. The results show that the out-of-plane stiffness of the prefabricated wall system in the elastic stress state under out-of-plane loading can be increased by increasing the number of self-tapping screws, increasing the thickness of the steel connector, or adopting the symmetrical arrangement of the light-gauge steel studs. The out-of-plane stiffness of the prefabricated wall system and the stiffness contribution of a single special-shaped steel connector can both be increased by increasing the number of special-shaped steel connectors. Furthermore, the special-shaped steel connector is more beneficial to a greater out-of-plane stiffness than the L-shaped steel connector. In addition, the theoretical calculation methods for deflection of the proposed prefabricated wall and flexural stress of the CFS C-channel stud considering the fireproof phenolic board sheathing effect under elastic state were proposed. The predicted results using the proposed method are compared with test results and the predicted results by using other methods. It was found that the predicted results by using the proposed method agreed better with the test results compared with the predicted results using the transformed-section method or the reduced stiffness method, which demonstrates the acceptability and accuracy of the proposed mothed for calculating deflection of the proposed prefabricated wall and flexural stress of the CFS C-channel stud.

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Elevated temperature thermal properties of carbon steels used in cold-formed light gauge steel frame systems

Cited by 22 publications

References 10 publications

Influence of Polypropylene, Glass and Steel Fiber on the Thermal Properties of Concrete

Influence of Polypropylene, Glass and Steel Fiber on the Thermal Properties of Concrete

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

Mechanical Properties of Prefabricated Cold-Formed Steel Stud Wall Panels Sheathed with Fireproof Phenolic Boards under Out-of-Plane Loading

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