翼缘尺寸及残余应力分布对焊接工形梁稳定性的影响  

The Influence of Flange Size and Residual Stress Distribution on the Stability of Welder Girder

作　　者：李平 闫铁成 王源 杜婷 LI Ping;YAN Tian-cheng;WANG Yuan;DU Ting(College of Civil Engineering,Longdong University,Qingyang 745000,Gansu;Forestry Bureau of Qingyang City,Qingyang 745000,Gansu)

机构地区：[1]陇东学院土木工程学院,甘肃庆阳745000 [2]庆阳市林业局,甘肃庆阳745000

出　　处：《陇东学院学报》2018年第5期68-71,共4页Journal of Longdong University

摘　　要：钢梁的弯扭失稳涉及诸多因素的影响,较轴心受压构件的弯曲失稳要复杂得多。焊接截面的钢梁整体失稳始于受压翼缘,为分析受压翼缘尺寸及残余应力分布对钢梁弹性弯扭屈曲的影响,以截面积相等翼缘面积不同的三种焊接工字型梁为研究对象,得知:翼缘尺寸对钢梁的稳定临界弯矩影响显著,残余应力使受压翼缘部分截面在发生整体失稳前提前进入屈服。The overall stability calculation of buckling of steel girders is much more complicated than the bending buckling of the axial compression member because of many factors. The overall buckling of welding section steel beam begins in compressive flange. In order to analyze the influence of compression flange size and residual stress on elastic-plastic torsional buckling of compressed member, three different sections of the cross-section which are equal to each other are studied. It is concluded that it is of significant effect of flange size on critical bending moment and causes the compression flange to enter into submission before the overall instability by residual stress.

关 键 词：受压翼缘 残余应力 临界弯矩 

分 类 号：TU323[建筑科学—结构工程]