钢制盖板节点拉剪破坏有限元分析

FINITE ELEMENT ANALYSIS ON BLOCK SHEAR RAPTURE OF STEEL GUSSET JOINTS

为了明确钢制盖板节点弯矩作用下的力学性能及盖板拉剪破坏的受力特征,获得弯矩作用下的计算设计公式,利用ANSYS分析软件,对钢制网壳盖板节点进行了有限元建模分析。根据有限元数值结果,得到盖板节点复杂应力下的承载力折减系数。在此基础上对比国内外规范公式,提出了钢制盖板节点拉剪破坏情况下的极限承载力公式。

In order to clarify the mechanical properties of the steel gusset joints under the moment and the tensile and shear failure characteristics of block shear rapture, and obtain the formula of bearing capacity, numerical model is established to simulate this joint by means of program ANSYS software. The reduction coefficient of the bearing capacity under the complex stress at the steel gusset joints is obtained based on finite element numerical results. On this basis, comparisons between domestic and overseas standards are conducted to propose the formula for ultimate bearing capacity of steel gusset joint under tension and shear failure.