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首页> 外文期刊>Fire Safety Journal >Thermal modelling of LSF floor-ceiling systems with varying configurations
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Thermal modelling of LSF floor-ceiling systems with varying configurations

机译：不同配置的LSF落地式系统的热建模

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Light gauge steel frame (LSF) floor-ceiling systems are increasingly used in buildings without a full understanding of their thermal and fire resistance performance. Hence a numerical study was undertaken on the thermal performance of LSF floor-ceiling systems with varying configurations under standard fire conditions. The configurations included Lipped Channel and rivet fastened Rectangular Hollow Flange Channel section joists, gypsum plasterboard lining, steel sheathing, structural plywood and rockwool fibre insulation. The measured elevated temperature thermal property data of the above floor system components were included in the 3D thermal finite element models and the results were compared with fire test results. A good comparison showed that the developed finite element models can be used to simulate the thermal behaviour of LSF floor-ceiling systems with varying configurations. A parametric study was then undertaken to extend the thermal performance data in terms of time-temperature profiles for LSF floor-ceiling systems. Finite element analyses showed that the new LSF floor-ceiling system with the addition of thin steel sheathing performed significantly better than conventional systems. The use of thin steel sheathing on both sides of plasterboard showed further improvements. The use of cavity insulation was shown to be detrimental and thus improved floor-ceiling configurations were proposed.
机译：轻型钢框架（LSF）落地系统越来越多地用于建筑物，无需全面了解其热和耐火性能。因此，在标准火灾条件下具有不同配置的LSF落地系统的热性能进行了数值研究。该配置包括锁定通道和铆钉紧固矩形空心法兰通道部分托梁，石膏石膏板衬里，钢护套，结构胶合板和摇滚冻纤维绝缘。上述地板系统部件的测量升高的温度热特性数据包括在3D热有限元模型中，并将结果与​​火试验结果进行比较。良好的比较表明，开发的有限元模型可用于模拟具有不同配置的LSF落地系统的热行为。然后进行参数研究以在LSF落地系统的时间温度型材方面扩展热性能数据。有限元分析表明，新的LSF落地式系统，具有添加薄钢护套的比较优于传统系统。在石膏板两侧使用薄钢护套显示出进一步的改进。腔绝缘材料的使用被证明是有害的，因此提出了改善的地铺上天花板配置。

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