空心钢管混凝土及中空注水构件的防火性能研究

余敏; 查晓雄

doi:10.13204/j.gyjz201106007

空心钢管混凝土及中空注水构件的防火性能研究

doi: 10.13204/j.gyjz201106007

余敏,
查晓雄

1.
哈尔滨工业大学深圳研究生院,广东深圳518055

详细信息

作者简介:
第一作者：余敏, 男, 1982年出生, 博士研究生。E-mail：yumin@hitsz.edu.cn

中图分类号: TU398.9
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- 文章访问数: 91
- HTML全文浏览量: 6
- PDF下载量: 144
- 被引次数: 0
出版历程
- 收稿日期: 2011-02-10
- 刊出日期: 2011-06-20

RESEARCH ON THE FIRE RESISTANCE BEHAVIOUR OF HOLLOW CONCRETE FILLED STEEL TUBE COLUMNS AND WITH WATER

1.
Shenzhen Graduate School,Harbin Institute of Technology,Shenzhen 518055,China

摘要

摘要: 通过有限元方法对具有相同外钢管尺寸的不同空心率的钢管混凝土，在不同的火灾荷载下的耐火性能进行分析，并对中空注水影响空心钢管混凝土的耐火性能进行研究。结果表明：火灾荷载比较大时，钢管混凝土构件的耐火时间随着空心率的增加先增加后减小；火灾荷载比较小时，构件的耐火时间随着空心率的增加基本呈线性减小。在火灾荷载比较大时，中空注水对耐火时间的影响很小；在火灾荷载比较小时，注水能明显地改善构件的耐火时间。在此基础上，给出不同火灾荷载比下空心钢管混凝土保护层厚度的简化计算方法和建议。
- 空心钢管混凝土 /
- 中空注水 /
- 防火性能 /
- 火灾荷载比 /
- 保护层厚度
Abstract: Non-linear finite element method is used to simulate the behaviors of H-CFST columns with different hollow ratio under different fire load ratio, which have the same steel tube size.Results show that when the term fire load ratio is relatively larger, fire resistance time of CFST firstly increases then decreases as hollow ratio increases.While fire load ratio is relatively smaller, fire resistance time of columns linear decreases as hollow ratio increases.When the hollow filled with water, the fire resistance time is almost the same under lager fire load ratio, but it can be obviously improved under small fire load ratio.Based on this conclusion and according to Chinese code, furthermore, a method of calculating the thickness of fireproof paint of H-CFST columns is given.
- hollow concrete-filled steel tube /
- hollow with water /
- fire resistance /
- fire load ratio /
- thickness of fireproof paint

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