局部变形的双角钢拉杆抗拉承载力研究

Research on Tensile Capacity of Tensile Members of Double Angle with Local Deformation

角钢拉杆是钢结构中的常见结构构件,在实际工程中由于机械碰撞、意外事故等原因容易产生局部变形,对承载力产生不利影响。国内已有对局部变形的单角钢拉杆承载力的研究,但还缺乏对有局部凹凸变形的双角钢杆件受拉承载力的研究。通过展开局部变形角钢拉杆受拉试验并对其进行有限元模型验证,对三种不同规格的等边双角钢拉杆进行有限元模拟分析,得到了不同局部变形条件下的双角钢拉杆的抗拉承载力折减系数,可用于不同局部变形双角钢构件的抗拉承载力验算。

The tensile member of angle steel is a kind of common component for steel structures. It often occurs local deformation in practical project because of mechanical collision or accidents. There are a lot of domestic research on the bearing capacity of tensile member of single angle. However, when it comes to the double equal-angle steel component with local concave-convex deformation, there is still a lack of research of its bearing capacity in related specifications. With the verified method of finite element simulation using ABAQUS software, a simulation study on three types of tensile members of double equal-angle was conducted. As a result, the reduction coefficient of tensile capacity with different local deformations was deduced, which could be used to check the tensile capacity of tensile members of double angle with different surface defects.