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浙江大学学报(工学版)
浙江大学学报(工学版)
土木工程     
耐火钢-钢管混凝土柱的防火保护层厚度
刘逸祥, 童根树, 张磊
浙江大学 建筑工程学院,浙江 杭州 310058
Fire protection thickness of concrete filled fire resistant steel tubular columns
LIU Yi xiang, TONG Gen shu, ZHANG Lei
Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China
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摘要：

为了得到火灾中耐火钢 钢管混凝土柱的防火性能,分析特定耐火极限下耐火钢 钢管混凝土柱所需的防火保护层厚度.采用厚涂型钢结构防火涂料、水泥砂浆作为耐火钢圆钢管混凝土柱防火保护层,蒸压加气混凝土板、水泥砂浆作为耐火钢方钢管混凝土柱防火保护层.变化混凝土强度、含钢率、荷载偏心率、钢管尺寸、耐火极限、长细比、钢材强度等参数,利用ANYSY有限元软件分析圆柱、方柱在火灾升温曲线下的温度场.采用数值计算方法求解圆柱、方柱满足特定耐火极限要求时所需的防火保护层厚度,提出3种保护层厚度的实用计算公式.由拟合公式得到的计算结果与理论计算结果的误差较小,可为有关工程的抗火设计提供参考.与普通钢管混凝土柱相比,耐火钢 钢管混凝土柱所需的防火保护层厚度明显较小,约为普通柱所需厚度的1/3～1/2,可节省建筑使用空间.
Abstract:

Fire protection thickness of CFT of FR steel was analyzed under certain fire resistances To obtain fireproof performance of concrete filled steel tube(CFT) of fire resistant(FR) steel in the fire. Fireproof retardant coating, cement mortar were used as fire protection for CFT of FR steel with circular cross section. And autoclaved aerated concrete slabs, cement mortar were used as fire protection for CFT of FR steel with square cross section. The temperature field of CFT was obtained by ANSYS under different concrete strengths, steel ratios, load eccentricity ratios, sizes, fire resistances, slenderness ratios, steel strengths. The fire protection thickness were solved with numerical technique. The simplified calculation formulas for predicting the thickness were deduced, which was found to be in good agreement with numerical results. The calculation formula can be referenced for the fire protection design of practical engineering. Parametric analyses show that fire protection thickness of CFT of fire resistant steel decrease significantly compared with CFT of ordinary steel. Therefore, the building space is saved.
出版日期: 2015-12-31
:  TU 541  
基金资助:

国家科技支撑资助项目（2012BAJ13B04）.
通讯作者: 童根树，男，教授，博导. ORCID:0000 0002 3985 8429.     E-mail: tonggs@zju.edu.cn
作者简介: 刘逸祥（1992—），男，博士生，从事钢结构稳定性和抗震研究. ORCID:0000 0002 3985 8413. E mail:11312003@zju.edu.cn
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刘逸祥, 童根树, 张磊. 耐火钢-钢管混凝土柱的防火保护层厚度[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008 973X.2015.12.019.

LIU Yi xiang, TONG Gen shu, ZHANG Lei. Fire protection thickness of concrete filled fire resistant steel tubular columns. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008 973X.2015.12.019.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008 973X.2015.12.019    或    http://www.zjujournals.com/eng/CN/Y2015/V49/I12/2387

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[1] 刘逸祥, 童根树, 张磊. 耐火钢圆钢管混凝土柱耐火极限和承载力[J]. 浙江大学学报(工学版), 2015, 49(2): 208-217.