Q460角钢两端偏心受压构件稳定设计方法研究

基于Q460高强角钢两端偏心受压试验，给出了高强角钢截面残余应力分布和初始几何缺陷，并结合多种设计方法对试验结果进行了分析计算、讨论和比较，对高强角钢两端偏心受压构件整体稳定承载力进行了研究。结果表明，现行杆塔结构设计采用《美国输电铁塔设计导则》（ASCEIO-1997）、《架空送电线路杆塔结构设计技术规定》（DI/T5154-2002）和我国《钢结构设计规范》（GB50017-2003）进行设计是偏保守的。基于平行轴为准按轴心受压构件计算有效长细比，并选用a类截面柱子曲线，而提出实用设计公式，建议公式计算结果和试验结果吻合较好，该方法可供工程设计时参考。

Study on Stability Design Method of Q460 Single Angel Steel Members under Eccentric Compression at Both Ends ＊

Based on the experimental research about the overall buckling behavior of Q460 single angle steel members under eccentric compression at both ends, the residual stress distributions for high strength steel angle and Initial geometric imperfections are presented, along with calculation,analysis and comparison of the experimental results. The results show that the current structural design standards ASCEI0 - 1997, DL/T 5154-2002 and GB 50017-2003 used in the calculation of high strength steel overall stability is conservative. Based on parallel axis bending to calculate the effective slenderness ratio according to axial compression members method, and select the buckling curve b, then propose practical design formulas. Comparison between the proposed formulas and experimental results demonstrate that they are in good agreement. This method is able to a reference for engineering design.