| 三面受火下带保护层钢筋混凝土梁温度场非线性分析 |
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| 引用本文： | 余志武,李超群,丁发兴.三面受火下带保护层钢筋混凝土梁温度场非线性分析[J].铁道科学与工程学报,2006,3(4):1-7. |
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| 作者姓名： | 余志武 李超群 丁发兴 |
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| 作者单位： | 中南大学,土木建筑学院,湖南,长沙,410075 |
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| 基金项目： | 国家自然科学基金;湖南省自然科学基金 |
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| 摘 要： | 在合理考虑混凝土热工参数的基础上,根据三面受火下带保护层钢筋混凝土梁离散体积单元的热平衡原理建立有限差分平衡方程,采用有限差分法导出了任一体积单元的温度计算公式,编制了截面温度场非线性有限差分程序,通过算例分析,验证了程序的正确性,对带保护层钢筋混凝土梁的温度场分析表明,采用保护层能有效的提高钢筋混凝土梁的耐火极限。这为进一步深入研究火灾下带保护层钢筋混凝土梁的力学性能和耐火极限创造了条件。
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| 关 键 词： | 钢筋混凝土梁 保护层 温度场 有限差分 非线性 |
| 文章编号： | 1672-7029(2006)04-0001-07 |
| 修稿时间： | 2006年5月25日 |
Temperature field nonlinear analysis of reinforced concrete beam with safeguard under three side exposing to fire |
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| YU Zhi-wu,LI Chao-qun,DING Fa-xing.Temperature field nonlinear analysis of reinforced concrete beam with safeguard under three side exposing to fire[J].Journal of Railway Science and Engineering,2006,3(4):1-7. |
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| Authors: | YU Zhi-wu LI Chao-qun DING Fa-xing |
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| Abstract: | Considering the thermal properties of concrete,the finite difference equation was built and formula for the temperature field of each element was deduced by using elemental heat energy balance of reinforced concrete beam with safeguard under three side exposing to fire.The program was developed for the nonlinear finite difference analysis of the temperature field within reinforced concrete beam with three side exposing to fire,an example of calculation was conducted and the program was validated by the experimental results from references,the analysis of reinforced concrete with safeguard indicates that it will enhance the limit of reinforced concrete against fire with safeguard.It is possible for further researches on the behaviors and fire resistance of reinforced concrete beam with safeguard. |
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| Keywords: | reinforced concrete beam safeguard temperature field finite-difference nonlinear analysis |
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