格构式塔架扭转刚度的高精度便捷算法

An efficient method for calculating of torsion stiffness of trellis tower mast

根据结构扭转时截面形状不变的假设,考虑腹杆和弦杆对扭转刚度的作用,建立了格构式塔架受扭时的数学模型。推导出矩形截面的格构式塔架扭转刚度和力矩分配系数的计算公式及常见9种塔架的柔度系数,并给出6种正方形对称塔架腹杆布置最佳倾角。实例计算表明,本文公式的计算结果与SAP84结果吻合。

On the hypothesis of section shape invariance after trellis tower mast twisted and considering both the effects of chords and webs on the torsion stiffness, build the mathematical model of trellis tower mast torsion, and derive the formulas of calculating torsion stiffness, torque distribution coefficients of trellis tower mast with rectangular section and the flexible coefficients of nine kinds of torsion tower mast commonly used in tower masts. And the option angles of web members arranged to increase the torsion stiffness of six kinds of symmetric tower mast with square section are given. The examples demonstrate that the calculating results of those formulas agree with the result of FEM Key word:trellis tower mast; torsion stiffness; torque distribution coefficient; flexible coefficient