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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
A two-dimensional axisymmetric pyrolysis thermal response model is proposed for solving the temperature field distribution of steel-wood composite structures. In the finite element numerical simulation of the model, various factors affecting the thermal response, such as the temperature dependence of thermophysical properties Treatment of latent heat of vaporization and non-linearity of boundary conditions (heat radiation); pyrolysis of wood, endothermic carbonization and continuous change of flame temperature with time are effectively treated. The test results show that the given calculation method can provide theoretical basis for the calculation of fire performance and the optimal design of the corresponding structure