暴露在丛林火灾火焰区条件下的轻钢框架外墙系统的数值建模

IF 2.9 3区 工程技术 Q2 ENGINEERING, CIVIL
Sahani Hendawitharana, Anthony Ariyanayagam, Mahen Mahendran
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引用次数: 0

摘要

与丛林火灾相关的建筑损失给丛林火灾频发的国家造成了不利的经济影响。建筑材料和部件在减少这些影响方面发挥着至关重要的作用。然而,由于实验研究成本高昂且缺乏数值研究,丛林火灾易发地区建筑外部组件的传热行为尚未得到充分研究。通常情况下,大规模传热模型是利用计算流体动力学(CFD)工具开发的,而用于建筑部件传热的 CFD 模型的可用性提高了对系统和系统系统行为的理解。因此,本文采用数值建模方法来研究轻型钢框架(LSF)外墙系统的丛林火灾/野火阻力。为 LSF 墙体系统开发了全尺寸和小尺寸传热模型。使用不同石膏板厚度和覆层材料的六种内外 LSF 墙体系统的实验结果来验证所开发的模型。随后,研究扩展到调查七种外墙系统在两种不同丛林火焰区条件下的耐丛林火灾能力。研究结果表明了火灾曲线、LSF 墙体组件和配置对墙体传热的显著影响。研究结果表明:1)钢包层和蒸压加气混凝土(AAC)板在墙体系统外侧使用时具有良好的性能;2)薄壁钢螺栓在丛林火灾中具有足够的承重能力。这项研究表明,大多数经过调查的 LSF 外墙都可以通过经济有效的改造(如在遭遇丛林火灾后更换防火侧(FS)钢包层)重新使用。总之,这项研究加深了人们对丛林火灾火焰区条件下轻钢框架外墙行为的理解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical modeling of external light gauge steel framed wall systems exposed to bushfire flame zone conditions

Bushfire-related building losses cause adverse economic impacts to countries prone to bushfires. Building materials and components play a vital role in reducing these impacts. However, due to high costs of experimental studies and lack of numerical studies, the heat transfer behavior of building’s external components in bushfire-prone areas has not been adequately investigated. Often large-scale heat transfer models are developed using Computational Fluid Dynamics (CFD) tools, and the availability of CFD models for heat transfer in building components improves the understanding of the behavior of systems and systems of systems. Therefore, this paper uses a numerical modeling approach to investigate the bushfire/wildfire resistance of external Light gauge Steel Framed (LSF) wall systems. Both full-scale and small-scale heat transfer models were developed for the LSF wall systems. Experimental results of six internal and external LSF wall systems with varying plasterboard thickness and cladding material were used to validate the developed models. The study was then extended to investigate the bushfire resistance of seven external wall systems under two different bushfire flame zone conditions. The results illustrate the significant effects of fire curves, LSF wall components and configuration on the heat transfer across the walls. They have shown 1) the favorable performance of steel cladding and Autoclaved Aerated Concrete (AAC) panels when used on the external side of wall systems and 2) the adequacy of thin-walled steel studs’ load-bearing capacity during bushfire exposures. This study has shown that most of the investigated external LSF walls could be reused with cost-effective retrofitting such as replacing the Fire Side (FS) steel cladding after bushfire exposures. Overall, this study has advanced the understanding of the behavior of external light steel framed walls under bushfire flame zone conditions.

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来源期刊
CiteScore
5.20
自引率
3.30%
发文量
734
期刊介绍: Frontiers of Structural and Civil Engineering is an international journal that publishes original research papers, review articles and case studies related to civil and structural engineering. Topics include but are not limited to the latest developments in building and bridge structures, geotechnical engineering, hydraulic engineering, coastal engineering, and transport engineering. Case studies that demonstrate the successful applications of cutting-edge research technologies are welcome. The journal also promotes and publishes interdisciplinary research and applications connecting civil engineering and other disciplines, such as bio-, info-, nano- and social sciences and technology. Manuscripts submitted for publication will be subject to a stringent peer review.
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