| 温升速率对某防火保护简支钢梁耐火时间的影响 |
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| 引用本文： | 李娟,姚斌,胡军.温升速率对某防火保护简支钢梁耐火时间的影响[J].火灾科学,2010,19(1):38-44. |
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| 作者姓名： | 李娟 姚斌 胡军 |
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| 作者单位： | 中国科学技术大学,火灾科学国家重点实验室,安徽,合肥,230026 |
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| 基金项目： | 国家自然科学基金项目资助(资助号50676089) |
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| 摘 要： | 在钢结构抗火研究中通常基于标准温升曲线分析钢构件的火灾响应特性,采用更接近实际火灾场景的BFD自然温升曲线,运用有限元分析软件ANSYS研究了不同火灾温升速率对某防火保护简支钢梁耐火时间的影响,并与经验公式法进行比较。结果表明:有限元分析结果与经验公式法的计算结果基本一致;不同温升速率会导致钢梁温度场变化的差异性,进而影响钢梁的耐火时间;在快速温升时,荷载大小对钢梁耐火时间的影响较大;当荷载较大时,钢梁耐火温度降低,快速温升下钢梁耐火时间较短。
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| 关 键 词： | 火灾温升速率 钢梁耐火时间 防火涂料 有限元分析 |
| 收稿时间： | 2009/11/24 0:00:00 |
| 修稿时间： | 1/4/2010 12:00:00 AM |
Effect of Temperature Rise Rate on Fire Resistance Period of a Simple Supported Beam with Fire Coating |
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| LI Juan,YAO Bin and HU Jun.Effect of Temperature Rise Rate on Fire Resistance Period of a Simple Supported Beam with Fire Coating[J].Fire Safety Science,2010,19(1):38-44. |
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| Authors: | LI Juan YAO Bin and HU Jun |
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| Institution: | State Key Laboratory of Fire Science;USTC;Hefei Anhui;230026;China |
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| Abstract: | The fire response characteristics of steel structure is usually studied based on the standard temperature rise curve.The BFD natural temperature rise curve which is closer to the real fire scenario is used in this paper.The effect of various temperature rise rate on fire resistance of a simply supported steel beam with fire coating was studied via the finite element analysis software ANSYS,and compared with the empirical formula method.The results indicate that finite element analysis are nearly the same wi... |
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| Keywords: | Temperature rise rate Fire resistance period of steel beam Fire coating Finite element analysis |
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