| 火灾下钢筋混凝土结构三维温度场的数值模拟 |
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| 引用本文： | 陈育,龚春城,张小英.火灾下钢筋混凝土结构三维温度场的数值模拟[J].四川建筑科学研究,2010,36(4). |
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| 作者姓名： | 陈育 龚春城 张小英 |
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| 作者单位： | 华南理工大学电力学院,广东,广州,510640 |
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| 基金项目： | 广东省科技攻关资助项目 |
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| 摘 要： | 研究受火钢筋混凝土构件内部温度场随时间的变化对于分析高温下建筑结构强度、形变的变化规律以及建筑结构的抗火性能是至关重要的.基于三维非稳态导热微分方程,用控制容积法建立了火灾环境下钢筋混凝土三维非稳态温度场的离散格式.计算了火灾环境下一钢筋混凝土楼板的三维非稳态温度场,其结果与文献报道的试验数据基本一致.还计算了一个由楼板、梁、柱和砖墙构成的钢筋混凝土整体结构在火灾中5 h的温度场.计算表明,各受火面在三维方向上的温度分布不是均匀的,火灾下建筑整体结构的温度场计算是一个三维问题;受火表面温度受到内部钢筋的影响而呈现波浪形分布;楼板和柱子的钢筋耐火极限应该同时被考虑.
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| 关 键 词： | 火灾 钢筋混凝土 温度场 数值模拟 |
Numerical simulation of three-dimensional temperature fields in reinforced concrete structure under fire |
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| CHEN Yu,GONG Chuncheng,ZHANG Xiaoying.Numerical simulation of three-dimensional temperature fields in reinforced concrete structure under fire[J].Building Science Research of Sichuan,2010,36(4). |
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| Authors: | CHEN Yu GONG Chuncheng ZHANG Xiaoying |
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| Affiliation: | CHEN Yu,GONG Chuncheng,ZHANG Xiaoying(School of Electric Power,South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | Calculating the changes of the temperature field in the reinforced concrete members under fire precisely is very important for the analysis on the change law of the intensity,deformation and the fire resistance performance in high temperature building construction.Base on the three-dimensional heat conduction differential equation,the discrete formulation of three-dimensional unsteady temperature field under fire is established by the volume-control method.Comparison between the numerical results of the uns... |
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| Keywords: | fire reinforced concrete structure temperature field numerical simulation |
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