Prediction of Heating Conditions and Thermal Response of Structural Members Exposed to Localized Flies
Prediction of Heating Conditions and Thermal Response of Structural Members Exposed to Localized Flies
批准号:
11555154
负责人:
HASEMI Yuji
金额:
$8.83万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (B)
财政年份:
1999
资助国家:
日本
项目状态:
已结题
起止时间:
1999 至 2001
中文摘要
通过实验和数值研究,获得了以下结果:(1)火灾暴露的局部性对柱火灾安全性的有效性通过对局部火源作用下的钢柱进行模型试验,发现其最大温升可降低到邻近均匀火焰加热的柱的50%-90%。(2)对局部加热作用下梁和柱上的热流分布进行建模和制表。采用钢结构和多孔丙烷燃烧器进行的模型试验表明,对于不同的结构和结构/火灾配置,热流密度沿梁/柱的分布是唯一的依赖关系。实验关联式已经通过一系列全尺寸热通量测量得到了验证。将数值流体动力学应用于火源上方钢梁热流场的再现,通过对火焰辐射模型的改进,使再现误差在30%以内。(3)局部加热下金属结构温度响应的数值计算有限差分法已应用于局部火灾下钢柱的温度场预测。热传递系数等经验常数已针对参考试验进行了调整。这种密闭室使实验结果重现得很好。
英文摘要
Through experiments and numerical studies, following results have been obtained.(1)Demonstration of the effectiveness of the localizedness of fire exposure for the fire safety of columnsThrough model experiments on a steel column exposed to a localized fire source, it has been found that its maximum temperature rise be reduced to 50 - 90 % of the column adjacent to an even flame heating.(2)Modeling and tabulation of heat flux distribution along a beam and a column exposed to a localized heatingModel experiments using steel structures and porous propane burners have yielded sole dependence of heat flux distribution along a beam/ column for respective configurations and structure/fire configurations. The experimental correlations have been validated against a series of full-scale heat flux measurements. Numerical fluid dynamcs has been applied to the reproduction of the heat flux field of the steelbeam above a fire source, which has resulted in th e reproduction within the error of 30 % by the improvement of the modeling of flame radiation.(3)Numerical cabulation of temperature response of metal structure exposed to a localized heatingFinite difference method has been applied to the prediction of the temperature field of a steel column exposed to a localized fire. Empirical constants such as heat transfer coeffifent have been tuned against a reference test. The cabulation has resulted in a fine reproduction of the experimental results.
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上川大輔, 長谷見雄二, 若松高志, 鍵屋浩司: "局部火災加熱を受ける鉄骨角柱の加熱性状"日本建築学会構造系論文集. 第556号(掲載決定). (2002)
Daisuke Kamikawa、Yuji Hasemi、Takashi Wakamatsu、Koji Kagiya:“局部火加热的方钢柱的加热性能”日本建筑学会结构工程学报第 556 号(已决定出版)。
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Wakamatsu, Hasemi, et al: "Heating Mechanism of Building Components Exposed to Localized Fire"Proc 4^<th> Asia Oceania Symposium on Fire Science & Technology. (掲載決定). (2000)
Wakamatsu、Hasemi 等人:“暴露于局部火灾的建筑构件的加热机制”,第 4 届亚洲大洋洲火灾科学与技术研讨会(2000 年出版)。
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上川大輔, 長谷見雄二, 鍵屋浩司, 若松高志: "局部火災加熱される鉄骨角柱の温度応答予測-有限要素法による鉄骨柱部材の伝熱解析"日本建築学会関東支部研究報告集I. 397-400 (2001)
Daisuke Kamikawa、Yuji Hasemi、Koji Kagiya、Takashi Wakamatsu:《局部火加热下钢框架方柱的温度响应预测——利用有限元法对钢框架柱构件进行传热分析》日本建筑学会关东分会研究报告一。 397-400 (2001)
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Wakamatsu, Hasemi, et al: "Exprerimental Study on the Heating Mechanism of a Steel Column Exposed to a Localised Fire"Proc 4^<th> Asia Oceania Symposium on Fire Science & Technology. (掲載決定). (2000)
Wakamatsu、Hasemi 等人:“局部火灾钢柱加热机制的实验研究”第 4 届亚洲大洋洲火灾科学与技术研讨会(2000 年出版)。
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Wakamatsu, T., Hasemi, Y., Ptchelintsev, A.V.: "Heating Mechanism of Building Components Exposed to a Localized Fire-CFD Prediction of Heat Flux to a Steel Beam-"Fire Science and Technology. Vol.20, No.1. 1-12 (2000)
Wakamatsu, T.、Hasemi, Y.、Ptchelintsev, A.V.:“暴露于局部火灾的建筑构件的加热机制 - CFD 预测钢梁热通量 -”火灾科学与技术。
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