火灾作用下轻型钢构件(结构)热-力耦合类相似理论研究  

Research on quasi-similarity theory of thermo-mechanical coupling of light steel members(structures)under fire

作　　者：张耕源 陈骁 邱仓虎 焦冰 王广勇 张唯 时艳艳 曹博 ZHANG Gengyuan;CHEN Xiao;QIU Canghu;JIAO Bing;WANG Guangyong;ZHANG Wei;SHI Yanyan;CAO Bo(China Academy of Building Research,Beijing 100013,China;Hangzhou Convention and Exhibition of New Century City Development and Construction Co.,Ltd.,Hangzhou 311200,China;School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013 [2]杭州市会展新城开发建设有限公司,杭州311200 [3]安徽理工大学土木建筑学院,淮南232001

出　　处：《建筑结构》2023年第12期7-14,29,共9页Building Structure

基　　金：中国建筑科学研究院自筹基金科研项目(20190111330730002);国家重点研发计划(2017YFC0803300)。

摘　　要：基于结构静力试验相似理论与温度场类相似理论,对轻型钢构件(结构)的热-力耦合类相似理论进行了研究。并通过钢柱、钢梁和钢框架的原型结构耐火极限与缩尺模型的耐火时间对比分析,对该理论进行了验证。结果表明:结合结构静力试验相似理论与温度场类相似理论,可使缩尺模型的耐火时间与ISO834标准升温曲线作用下原型结构的耐火极限相同,即火灾作用下轻型钢构件(结构)热-力耦合类相似理论成立。当模型自重对荷载的影响不可忽略时,可通过人工附加配重的方法来弥补缩尺模型材料容重的不足。Based on the similarity theory of structural static test and quasi-similarity theory of temperature field,the study was conducted on the quasi-similarity theory of thermo-mechanical coupling of light steel members(structures).The theory was validated by comparing and analyzing the fire resistance limits of prototype structures and the fire resistance time of scaled models of steel columns,steel beams,and steel frames.The results show that by combining the similarity theory of structural static test and quasi-similarity theory of temperature field,the fire resistance time of the scaled model can be made identical to the fire resistance limit of the prototype structure under the ISO834 standard temperature rise curve,thus proving the validity of the quasi-similarity theory of thermo-mechanical coupling of light steel members(structures)under fire.When the influence of the model's own weight on the load cannot be ignored,it is possible to compensate for the insufficient material density of the scaled model by artificially adding additional weights.

关 键 词：轻型钢构件(结构) 热-力耦合类相似理论 非膨胀型防火涂料 数值模拟 耐火极限 

分 类 号：TU398.5[建筑科学—结构工程]