摘要
为考察钢框架梁-柱连接的抗火性能,建立平面钢框架全焊接节点有限元模型,用ANSYS分析其在火载荷作用下的行为,得到的温度-转角曲线与试验数据基本吻合;通过数值模拟得到不同载荷比值下的4种空间钢框架全焊接节点的温度-转角曲线.结果表明:载荷比值不同,空间钢框架全焊接节点在火灾作用下的临界温度不同;在相同的载荷比值下,不同空间钢框架全焊接节点的临界温度也不相同.在空间钢框架全焊接节点的抗火设计中,应加强对H型柱翼缘与梁连接方向的边节点和角节点的防火保护.
To study the fire-resistance performance of beam-column connection of steel structure, a finite element model is built for the whole welded joints of planar steel frames, ANSYS is used to analyze its behavior under fire load, and the temperature-rotation curves are basically consistent with those of the experimental data; by numerical simulation, the temperature-rotation curves of four kinds of whole welded joints of spatial steel frames are obtained under different load ratioos. The results show that, the critical temperature of the whole spatial beam-column joints under fire load is different when the load ratio is different; when the load ratio is the same, the critical temperature of different kinds of welded spatial beam-column joints is different. During the fire-resistance design of whole welded joints of spatial steel frame, the exterior joints and corner joints in the direction of connection between H-type column flange and beam should be strengthened.
出处
《计算机辅助工程》
2014年第1期37-43,共7页
Computer Aided Engineering
基金
国家自然科学基金(11272189)
山东省自然科学基金(ZR2012EEM009)
关键词
空间钢框架
梁柱焊接节点
抗火
载荷比值
临界温度
有限元
spatial steel frame
beam-column welded joint
fire-resistance
load ratio
critical temperature
finite element
