高强度Q460钢梁抗火性能研究(Ⅱ)——理论验证  

Fire Resistance Analysis of High Strength Q460 Steel Beams-Part Ⅱ:Theory Validation

作　　者：王卫永[1] 周一超[1] 于宝林[2] 彭川[3] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]密歇根州立大学土木与环境工程系,美国密歇根48824 [3]重庆理工大学资产管理公司,重庆400050

出　　处：《土木建筑与环境工程》2014年第3期72-79,共8页Journal of Civil,Architectural & Environment Engineering

基　　金：重庆市博士后特别资助(渝xm201103007);中国博士后科学基金(20110490811;2012T50765)

摘　　要：系列文章的第1篇已经对高强度Q460钢梁高温下的抗火性能进行了理论分析,给出了高强度Q460钢梁的温度分布和极限承载力、临界温度和稳定系数的计算方法。该文采用有限元分析对高强度Q460钢梁的温度分布和极限承载力进行了计算,并将计算结果与理论分析和试验结果进行了对比,验证了理论分析的正确性。对高强度Q460钢梁和普通Q235钢梁的抗火性能进行了对比,得到两者在抗火性能方面的区别。提出了高强度Q460钢梁抗火设计的简化方法,并通过一个算例演示了简化设计方法的使用。In the previous companion paper, the fire resistance of high strength steel beams made from Q460 was theoretically studied. The methods to obtain temperature distribution, critical moment, critical temperature and stability coefficient were presented. The temperature distribution and load bearing capacity was analyzed by finite element method, and the validation was evaluated by comparison of results between theoretical computation and finite element analysis as well as experimental results. The comparison was made between Q460 steel beam and mild Q235 steel beam and the difference on fire resistance was obtained. A simplified approach for fire resistance of high strength Q460 steel beams was proposed and an example was given to show the application and reference of the approach.

关 键 词：有限元 高强钢 抗火性能 钢梁 

分 类 号：TU392[建筑科学—结构工程]