| 钢-木组合结构在火灾中的热响应数值模拟 |
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| 引用本文： | 李明海,任建勋,罗群生,宋耀祖,过增元.钢-木组合结构在火灾中的热响应数值模拟[J].清华大学学报(自然科学版),2001,41(2):68-71. |
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| 作者姓名： | 李明海 任建勋 罗群生 宋耀祖 过增元 |
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| 作者单位： | 1. 清华大学 工程力学系,
2. 成都市521信箱50分箱, |
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| 摘 要： | 提出了一种可用于求解钢 -木组合结构温度场分布的二维轴对称火烧热响应模型 ,在该模型的有限元数值模拟中 ,对影响热响应的各种因素 :材料热物性的温度相关性 ,水蒸汽汽化潜热的处理 ,边界条件的非线性 (热辐射 ) ;木材热解、炭化吸热以及火焰温度随时间的不断变化等均进行了有效处理。试验测试结果表明 ,所给出的计算方法可为相应结构的防火性能计算及其优化设计提供理论依据
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| 关 键 词： | 火烧试验 数值模拟 热响应模型 求解方法 |
| 文章编号： | 1000-0054(2001)02-0068-04 |
| 修稿时间： | 1999年12月16 |
Numerical simulation of the thermal response of steel wood composite structure on fire |
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| LI Minghai ,Ren Jianxun ,LUO Qunsheng ,SONG Yaozu ,GUO Zengyuan.Numerical simulation of the thermal response of steel wood composite structure on fire[J].Journal of Tsinghua University(Science and Technology),2001,41(2):68-71. |
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| Authors: | LI Minghai Ren Jianxun LUO Qunsheng SONG Yaozu GUO Zengyuan |
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| Institution: | LI Minghai 1,Ren Jianxun 1,LUO Qunsheng 2,SONG Yaozu 1,GUO Zengyuan 1 |
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| Abstract: | A two dimensional axisymmetric thermal response model for the determination of the temperature distribution in steel wood composite structure exposed to fire is presented using reasonable simplifications. The model, based on the finite element method, includes temperature dependent material properties, moisture evaporation, nonlinear boundary conditions (thermal radiation), an energy sink due to pyrolysis and charring of the wood, and variable fire exposure conditions. Agreement between measured and calculated results is good, which shows that the calculational method provides an efficient tool for predicting composite structure thermal performance for preliminary design decisions. |
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| Keywords: | fire test numerical simulation thermal response model solution methods |
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