分解刚度法简化分析架空输电线路铁塔对称结构杆件内力

Break up Rigidity, Simply Analyze the Inner Force of Transmission Line Iron Tower Symmetric Structural Parts

输电线路杆塔结构是一种空间桁架结构,其受荷情况复杂,结构型式多样化。采用简单的平面桁架分析法对其进行分析已显得较为粗略,计算结果不准确;而采用空间桁架分析法又过于烦琐。本文提出以分解刚度法分别列出铁塔各段等效抗弯刚度和等效抗剪刚度简化空间桁架分析法中的总刚度矩阵,进一步简化计算杆塔结构内力,通过大量计算数据证实该法计算结果准确,使计算过程更为精确而便捷,能够快速利用结果精确选择杆件型式及确定基础型式。虽然不考虑各杆段之间联系,但在设计初步计算中应用比较方便准确。

The Structure of transmission line tower is a kind of space truss with multiple types and complex loading, Use simple plane truss analysis method is rough with out precise calculation and the space truss analysis method is complex. This paper provided break up rigidity method and listed equivalent anti—bending rigidity and equivalent anti—shearing rigidity of every part of the tower to simplify the total rigidity matrix of the space truss analysis method, further simply calculate tower structure inner force and made calculation more precise through large quantity calculation data.