表面设置防火涂料的RC柱抗火性能分析研究及应用  

Analysis and Application of the Fire Resistance Performance of the RC Beam with Fire Retardant Coating Surface

作　　者：欧蔓丽[1] 曹伟军[1] 蒋隆敏[1] 曹晖[1] 

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007

出　　处：《科技通报》2012年第10期76-80,共5页Bulletin of Science and Technology

基　　金：湖南省教育厅高等学校科学研究项目(08C290);湖南省教育厅高等学校科学研究项目(10C0625);中包总公司科研计划学科建设项目(2008-XK03);湖南省自然科学基金项目(10JJ3080);湖南省科技厅一般项目(2009GK3007)

摘　　要：通过试验反算给出了某非膨胀型的厚度20 mm的防火涂料对应不同温度区间的平均导温系数。随后,利用通用的结构抗火分析软件SAFIR计算和分析了表面设置防火涂料的高强混凝土柱的抗火极限性能,考查了截面尺寸、轴压比、荷载偏心率及配筋率等因素的影响,在此基础上提出了相应的高强混凝土柱耐火极限实用计算公式。研究结果表明:该涂料的平均导温系数随温度升高有所降低;表面设置厚度20 mm的该涂料可明显提高高强混凝土柱的耐火极限,提高幅度达40%～350%。最后对钢筋混凝土柱的抗火性能做了综合分析和总结。This article through the test of the coating are calculated the average temperature range corresponding to different temperature conductivity;Then,use structure analysis software to hang fire SAFIR set the coating surface of high strength concrete columns of fire resistance limit are calculated,inspected the section size,the axial compression ratio,the load eccentricity and reinforcement ratio and the influence of the factors,and based on this,puts forward the corresponding high strength concrete columns refractory limit practical formulas.The results of the study show that： the coating of the average temperature conductivity increases with temperature reduced;the surface of 20 mm thickness setting can obviously increase the coating of high strength concrete column of refractory limit,the increase was 40% ～ 350%.The last of the reinforced concrete beam of fire resistance performance of the comprehensive analysis and summary.

关 键 词：防火涂料 RC柱 导温系数 抗火性能 

分 类 号：TU528.31[建筑科学—建筑技术科学]