| 火灾模型对钢交错桁架结构性能化抗火设计的适用性分析 |
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| 引用本文： | 陈长坤,张冬,刘广林.火灾模型对钢交错桁架结构性能化抗火设计的适用性分析[J].灾害学,2010,25(1):93-97. |
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| 作者姓名： | 陈长坤 张冬 刘广林 |
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| 作者单位： | 中南大学,防灾科学与安全技术研究所,湖南,长沙,410075 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 对目前性能化防火设计中常用的4种火灾作用模型进行了分析和总结,并运用这4种模型对钢结构交错桁架在火灾时的热环境进行了模拟,分析不同火灾作用模型下该体系的结构响应,研究不同火灾作用模型对交错桁架结构性能化抗火设计的适用性。研究表明:火源功率、火灾载及火灾持续时间等因素对钢结构交错桁架的抗火分析具有重要影响。国际标准升温曲线和参数化室内升温曲线不考虑火源功率、建筑通风口等因素,缺乏针对性,分析结果偏于保守;区域模型所得温度偏低,不宜用于交错桁架结构的性能化抗火设计;场模型考虑了火源功率及环境温度分布的不均匀性,和实际火灾较接近,计算结果相对较为准确,可用于结构的性能化防火设计。
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| 关 键 词： | 火灾模型 交错桁架 结构抗火 钢结构 |
Applicability Analysis of Fire Models in Performance-based Fire Protection Design for Steel Staggered-Truss System |
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| Chen Changkun,Zhang Dong,Liu Guanglin.Applicability Analysis of Fire Models in Performance-based Fire Protection Design for Steel Staggered-Truss System[J].Journal of Catastrophology,2010,25(1):93-97. |
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| Authors: | Chen Changkun Zhang Dong Liu Guanglin |
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| Institution: | Chen Changkun,Zhang Dong , Liu Guanglin(Disaster Prevention Science , Safety Technology Institute,Central South University,Changsha 410075,China) |
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| Abstract: | Four kinds of fire models,which are commonly used in performance-based fire protection design are analyzed and summarized.The fire environment of steel staggered-truss is simulated using these four models.The effect of different fire models on fire-resistance analysis of steel staggered-truss is explored.And the applicability of fire models to the performance-based fire protection design on steel staggered-truss structure is discussed further.The result indicates that the rate of heat release,fire load and ... |
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| Keywords: | fire model staggered truss fire resistance of structure steel structure |
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