剪切滞后对受拉角钢强度的影响

On influence of shear lag on strength of tension angle iron

为了研究剪切滞后对受拉角钢强度的影响,并对单面连接角钢强度计算公式进行修正.根据Whitmore应力扩散概念,初步确定了应力扩散角,建立了求解剪切滞后强度计算公式,并通过有限元分析软件,对受力模型与理论结果进行对比分析.结果表明:剪切滞后对受拉角钢强度有很大的影响,剪力滞后系数公式可以用于理论计算和工程设计.

In order to study influence of shear lag on strength of tension angle iron and correct strength computational formula of unilaterally connected angle iron,this paper establishes stress dispersion angle according to Whitmore concept of stress dispersion,creates strength computational formula of shear lag,and carries out contrastive analysis on model and theoretical results with finite element analysis software.The results show that shear lag has great influence on strength tension angle iron and shear lag coefficient formula can be used in theoretical calculation and engineering design.