弹性约束下H型钢柱火灾行为的数值模拟  

Numerical Simulation of Restrained H-Shaped Steel Column at Fire Temperatures

作　　者：周焕廷[1] 常正非 李国强[3] 王林 杨志勇[1] 

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]深圳冶建院建筑技术有限公司,深圳518054 [3]同济大学土木工程学院,上海200092 [4]湖北公力工程咨询服务有限公司,襄樊441004

出　　处：《武汉理工大学学报》2010年第9期229-232,322,共5页Journal of Wuhan University of Technology

基　　金：国家杰出青年基金(50225825)

摘　　要：利用有限元方法对钢柱在火灾作用下的力学行为进行了数值分析。采用与试验一致的升温曲线,对四面受火钢柱的温度场进行分析。柱下端固定,上端采用弹性约束,承受轴向集中荷载作用。得到了钢柱在火灾作用下的侧向变形与温度关系曲线及轴向约束力与温度关系曲线。与试验结果对比显示,钢柱的耐火时间和约束力大小与试验结果一致,证明了文中的模拟计算方法正确、结果可靠。The numerical simulation of fire resistance of steel column has been dealt with.The ambient temperature-time curve is the same as the curve acquired by test.The temperature field distributed in the steel column has been analyzed.In the structural analysis,the bottom end of column is fixed;the top end is elastically restrained,and the column is loaded concentrated force axially.The steel column curves of the lateral displacement-temperature and axial binding force-temperature are obtained.The simulation results are close to the experimental values with deviation of no more than 7%.

关 键 词：数值模拟 钢柱 抗火性能 火灾试验 

分 类 号：TU391[建筑科学—结构工程] X932[环境科学与工程—安全科学]