摘要
输电线路中,十字组合角钢塔主材的传统单角钢拼接方式存在内外角钢受力不均匀,导致实际承载力与理论设计值偏差较大等缺陷,为此提出采用双角钢拼接方式来改善十字组合角钢塔的受力性能。就十字组合角钢主材的2种拼接方式进行受力分析,通过有限元仿真分析,比较2种不同拼接方式主材构件位移的协调性、受力的均匀性、主材最大应力控制截面的应力状态。经计算分析指出双角钢拼接方式位移协调性好,受力性能优于单角钢拼接方式,非等高接腿表现尤为明显,其最大应力控制截面上2种拼接方式主材的最大应力分别相差4.7%和13.7%。
The stress inside and outside the traditional cross-section combined angle steel of power transmission lines are uneven, which results in the deviation between the actual carrying capacity and theoretical design value. The double-angle steel splicing is proposed to improve the mechanical behavior of cross-section combined angle steel. Stress analysis on two splicing forms of cross-section combined angle steel was carried out with finite element simulation, so as to compare two different forms＇ the coordination of component displacement, stress evenness, and stress status of the maximum stress control section. The results show that the displacement compatibility and the bearing capacity in double-angle steel splicing form are better than those in the single-angle steel splicing form, especially for towers with different height legs, in which the maximum stress of the main material of two splicing forms on the control section is 4.7% and 13.7%, respectively.
出处
《电力建设》
2013年第5期71-75,共5页
Electric Power Construction
基金
国家电网公司科技项目(GC71-11-005)
关键词
十字组合角钢
单角钢拼接
双角钢拼接
协调性
受力均匀性
控制截面
cross-section combined angle steel
single-angle steel splicing
double-angle steel splicing
coordination
stressevenness
control section
