文档介绍：华中科技大学
硕士学位论文
大空间钢结构性能化抗火设计与评估
姓名:张慧怡
申请学位级别:硕士
专业:结构工程
指导教师:熊世树
20080606
华中科技大学硕士学位论文
摘要
在现代建筑中,大空间钢结构建筑得到广泛应用,但是钢结构耐火性能差,火灾
时结构很容易遭受破坏以致倒塌。目前“处方式”建筑防火设计规范采用构件耐火极
限的抗火设计方法不能完全反映建筑物的火灾特性、空间特性和结构特性的影响,也
不能满足建筑结构可靠性和最优成本的要求,对于大空间建筑物尤其如此。而性能化
的抗火设计方法正是解决上述问题的最佳途径之一,目前国内外的一些重大工程项目
上已运用性能化抗火设计方法,取得了较好的效果。因此,研究大空间钢结构性能化
抗火设计具有重要理论意义和工程价值。
本文以武汉光谷体育馆为工程背景,根据性能化抗火设计思路对其进行了抗火性
能分析和安全评估。首先根据结构抗火性能要求设定抗火目标,对场馆内可能的火灾
场景进行全面分析,得到可能最不利的火灾场景。然后运用火灾模拟软件 FDS 计算各
火灾场景下实际升温曲线,以此作为 ANSYS 热分析的热边界条件,计算得到构件截面
平均升温曲线。并将热分析结果作为温度荷载施加于结构,采用 ANSYS 软件对结构的
力学和变形性能进行分析,最后根据结构的受火性能是否满足抗火性能目标来评估结
构的抗火安全性及是否需要采取其他的防火保护措施。

关键词:大空间结构火灾场景火灾模拟抗火分析性能化设计
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华中科技大学硕士学位论文
Abstract
Large-space steel structures have been widely used in the modern buildings. But the
structure will be destroyed and even collapse when a fire happens, because of its weakness
of fire-resistance ability. Right now, the “prescription” design method based on fire
resistance of ponents has been introduced in the Building Fire Protection's Code.
This method doesn’t totally reflect the influence of the fire features, space characteristics
and structural properties in the building, either can’t meet the requirement of the structural
reliability and the cost optimized, especially for large-space buildings. And the
performance-based method for structural fire safety is one of the best ways to solve the
problems. Currently this method has been used in some important projects and it works
well in China and other regions of the world. So it’s meaningful for theoretic and worthful
for projects to research the performance-based method for large-space steel structures.
In this thesis, the gymnasium of Guanggu, Wu Han is the project background. The
fire-resistance property and the safety of the gymnasium is analyzed with the performance
based method. Firstly, the target of fire-resistance is set up based on the fire-resistance
property of the structure, following that the po