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Modelling thermal performance of gypsum plasterboard-lined light timber frame walls using SAFIR and TASEF

机译:使用SAFIR和TASEF对石膏石膏板衬砌的轻木框架墙的热性能进行建模

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摘要

Gypsum plasterboard is commonly used as a lining material on lightweight timber or steel framing. Gypsum contains moisture, both free and chemically bound in its crystal structure. The dehydration of the gypsum and decomposition of calcium carbonate absorb heat giving gypsum plasterboard fire resistant qualities. This paper discusses the suitability of the finite element heat transfer program SAFIR for modelling plasterboard-lined light timber frame assemblies and its limitations. The default material properties in SAFIR for gypsum plasterboard do not give good results and 'smoothing' of enthalpy curves has insignificant effects on the results but substantially reduces processing time. Modelling with SAFIR gives similar results to prior modelling using the program TASEF with slight differences. Both programs give better overall results for slower developing fires and furnace tests than more rapidly growing fires. Reasonable, slightly conservative results for thermal analysis of heat transfer through the walls and into timber studs can be achieved using the parameters suggested in this paper. More sophisticated and detailed models incorporating mass transfer, effect of fasteners, gaps between lining sheets and ablation are required to achieve better comparisons.
机译:石膏石膏板通常用作轻质木材或钢框架的衬里材料。石膏中的水分既游离又化学结合在其晶体结构中。石膏的脱水和碳酸钙的分解吸收热量,从而赋予石膏石膏板耐火性。本文讨论了有限元传热程序SAFIR对石膏板衬砌的轻木框架组件建模的适用性及其局限性。 SAFIR中石膏石膏板的默认材料属性无法提供良好的结果,并且焓曲线的“平滑”对结果的影响不明显,但可以大大缩短处理时间。使用SAFIR进行建模可获得与使用TASEF程序进行的先前建模相似的结果,但有细微差别。与较快增长的火灾相比,对于慢速发展的火灾和炉子测试,这两个程序都能提供更好的总体结果。使用本文建议的参数,可以对通过墙壁和木材壁的热传递进行热分析,得出合理的,稍微保守的结果。为了获得更好的比较,需要结合质量传递,紧固件效果,衬板之间的间隙和烧蚀的更复杂,更详细的模型。

著录项

  • 来源
    《Fire and materials》 |2010年第8期|p.385-406|共22页
  • 作者

    G. Thomas;

  • 作者单位

    School of Architecture, Victoria, University of Wellington, P.O. Box 600, Wellington, New Zealand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    gypsum plasterboard; light timber; heat transfer; finite element; SAFIR; TASEF;

    机译:石膏石膏板;轻木传播热量;有限元;SAFIR;塔瑟夫;

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