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浙江大学学报(工学版)
浙江大学学报(工学版)
土木与交通工程     
耐火钢-混凝土组合梁抗火性能试验
蒋翔, 童根树, 张磊
浙江大学 建筑工程学院,浙江 杭州,310058
Experiments on fire-resistance performance of fire-resistant steel-concrete composite beams
JIANG Xiang, TONG Gen shu, ZHANG Lei
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
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摘要：

进行2个防火涂料厚度不同的耐火钢-混凝土组合梁试件，以及1个同等条件下的普通钢-混凝土组合梁试件作为对照组的抗火试验.测量炉温、组合梁沿截面高度不同测点的温度、组合梁跨中竖向挠度.试验结果表明：可取跨中挠度达到梁跨的1/30作为简支耐火钢-混凝土组合梁达到耐火极限状态的界限.防火涂料厚度为15 mm的耐火钢-混凝土组合梁耐火极限时间为93 min，比相同条件下的普通钢-混凝土组合梁耐火极限时间64 min提高了45.3%；当防火涂料厚度为25 mm时，耐火钢-混凝土组合梁的耐火极限时间为132 min，超过中国规范（GB50016：2014）中梁一级防火的要求.在一定的火灾和荷载等条件下，采用相同强度等级耐火钢的钢-混凝土组合梁具有更好的抗火性能，可减小建筑物的防火涂层厚度.
Abstract:

Fire resistance tests were carried out on 2 fire-resistant steel-concrete composite beams (FRSCCB)with different thicknesses of fire fireproof coating, and 1 conventional structural steel-concrete composite beam(CSSCCB) under the same conditions as a control group. The furnace temperature, the temperature distribution along the composite beam sections and the mid-span deflection were measured. The test results show that the simply supported FRSCCB reaches its fire limit state when the mid-span deflection reaches 1/30 of the span. The fire-resistance time of the first set FRSCCB with 15 mm fireproof coating is 93 min and exceeds the fire-resistance time of CSSCCB which is 64 min more than 45.3%.The fire-resistance time of the FRSCCB with 25 mm fireproof coating is 132 min, which surpasses the Grade 1 beam fire-resistance requirement according to Chinese code GB50016: 2014. In conclusion, the fireresistant steel can be used to improve the fire resistance performance of steel-concrete composite beams and to decrease the thickness of fire proof coating.
出版日期: 2016-08-01
:     
基金资助:

国家科技支撑计划资助项目（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: 蒋翔（1989—），男，博士生，从事钢结构稳定性和抗火等研究. ORCID： 0000-0002-9164-3452. E-mail: civilj@zju.edu.cn
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蒋翔, 童根树, 张磊. 耐火钢-混凝土组合梁抗火性能试验[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.08.006.

JIANG Xiang, TONG Gen shu, ZHANG Lei. Experiments on fire-resistance performance of fire-resistant steel-concrete composite beams. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.08.006.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.08.006    或    http://www.zjujournals.com/eng/CN/Y2016/V50/I8/1463

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