交替支撑塔架主角钢计算长度系数

利用能量法对两个肢平面方向交替支撑的塔架主角钢弯扭屈曲的临界荷载进行分析,获得主角钢无扭转约束作用和完全扭转约束作用下,按照平行轴弯曲屈曲计算的换算计算长度系数,同时分析支撑点处扭转约束的影响,并比较能量法与ANSYS有限元软件的精度。提出计算长度系数的近似公式。

EFFECTIVE LENGTH FACTOR OF ANGLES ALTERNATELY BRACED IN TWO LEGS

The Ritz method is used to analyze the flexural-torsional buckling of leg angles in transmission towers alternately braced in two leg angles,the equivalent effective length factors with full torsional restraints and without torsional restraints on the supports for equivalent flexural buckling are solved for.The effect of torsional restraints on the buckling is analyzed.The accuracy of the energy method is compared with ANSYS.A formula with excellent accuracy is proposed for the equivalent effective length f...