人字形钢梁折点转动性能的有限元分析  

FEA OF ROTATING PERFORMANCE FOR BREAK POINT OF MANSARD STEEL BEAM

作　　者：黄军超 崔文一[1] 张治新[1] 

机构地区：[1]延边大学工学院结构工程学科,吉林延吉133002

出　　处：《钢结构》2015年第6期42-45,共4页Steel Construction

摘　　要：为了解人字形钢梁折点的转动性能以及折点转动对人字形钢梁挠度的影响,利用有限元分析软件ANSYS对4种不同坡度的人字形钢梁进行非线性模拟分析。结果表明:折点区域的转动方向与折梁的坡度有关。在荷载作用下,坡度为1/5、1/6、1/8的人字形钢梁,拱效应产生的反向弯曲明显;折点夹角缩小,对人字形钢梁跨中挠度的增长有抑制作用,对结构有利。坡度1/10的人字形钢梁,折点夹角增大,促进了挠度增长。在设计时,应合理选择钢梁坡度。In order to understand rotating performance for break point of mansard steel beam and the effect of the rotation of break point on mansard steel beam, in this paper, nonlinear simulation analysis of four mansard steel beams with different slope were carried out by using ANSYS. The results showed that the direction of rotation at break point area was related to the slope of the mansard steel beam. The angle at break point of mansard steel beam （1/5,1/6,1/8） gradually reduced as the load increased because the reverse bending was obvious due to arching effect, meanwhile, growth of mid-span deflection of mansard steel beam could be restrained, and it was good for the structure. On the contrary, the angle at break point of mansard steel beam with 1/10 slope increased as the growth of mid-span deflection increased. In design,the slope of mansard steel beam should be selected reasonably.

关 键 词：人字形钢梁 折点 转动性能 

分 类 号：TU391[建筑科学—结构工程]