火场-结构联合分析简化模型及其应用研究

陈适才; 徐珊; 张磊; 闫维明

doi:10.21656/1000-0887.370351

火场-结构联合分析简化模型及其应用研究

doi: 10.21656/1000-0887.370351

陈适才^1,2,
徐珊¹,
张磊¹,
闫维明^1,2

¹北京工业大学城市与工程安全减灾教育部重点实验室, 北京 100124;²北京工业大学工程抗震与结构诊治北京市重点实验室, 北京 100124

基金项目: 国家自然科学基金(51678016;51278516)

详细信息

作者简介:
陈适才（1979—）,男,副教授,博士(通讯作者. E-mail: csc@bjut.edu.cn).

中图分类号: TU2
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- 文章访问数: 1099
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- 被引次数: 0
出版历程
- 收稿日期: 2016-11-15
- 修回日期: 2016-11-23
- 刊出日期: 2017-08-15

A Simplified Model for Coupled Fire-Structure Analysis and Its Application

¹Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology, Beijing 100124, P.R.China;²Key Laboratory of Earthquake Engineering and Structural Retrofit of Beijing, Beijing University of Technology, Beijing 100124, P.R.China

Funds: The National Natural Science Foundation of China(51678016;51278516)

摘要

摘要: 为在建筑结构火灾反应分析中考虑实际火场特性，并简化火场分析模型与结构有限元分析模型之间的复杂对应关系，提出并建立了火场温度及对流辐射边界的热传导分析时空模型(STM)和基于时空模型的火场-结构联合分析方法。该方法根据火场模型计算出室内火场温度分布场以及对流辐射边界场离散数据，通过双向正交多项式进行拟合来得到不同时刻的构件边界连续时空模型，再通过时空模型进行热传导分析和热力耦合分析，从而实现火场-结构联合分析方法。在验证其合理性的基础上，通过ABAQUS子程序UTEMP和DFLUX实现其分析过程，并进行了北京某档案馆工程的应用分析，结果表明该方法可以较好地联合火场模拟与结构分析用于结构火灾安全评价。
- 结构抗火 /
- 火场特性 /
- 时空模型 /
- 简化方法
Abstract: To consider the actual fire characteristics in the fire response analysis of building structures and simplify the complex relationship between the fire analysis model and the structural finite element analysis model, a spatio-temporal model of fire temperature and heat flux boundary for heat conduction analysis was developed. The model adopted the 2-way orthogonal polynomial approach to fit the discrete data from fire simulation and obtained the continuous spatial polynomial equations, which was proved to be accurate for capturing the distribution of temperature and heat flux required in heat conduction analysis and thermo-mechanical coupling analysis. Finally, the model was applied through user subroutines UTEMP and DFLUX in ABAQUS to the fire resistance analysis of a new archive building in Beijing. The results show that this method can be used to combine fire simulation and structural analysis for safety evaluation of structures under fire.
- fire resistance /
- fire characteristic /
- spatio-temporal model /
- simplified method

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参考文献(15)

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