摘要
结合大截面角钢的截面特性,通过理论分析计算出了大角钢及部分十字双角钢的临界计算长度,并分析了设计中对大角钢和十字双角钢的应力比控制情况;以糯扎渡送电广东±800kV直流线路中的J2713塔作为实例,通过建立大角钢和十字双角钢2种模型,经过优化计算,并对设计结果和经济效益进行分析比较,Q420大角钢值得大规模推广应用的结论。
Considering the width angle steel, the critical section characteristic of large effective length of large width angle steel and part of crisscross double built-up angle steel is calculated through theoretical analysis. The stress ratio control of large width angle steel and crisscross double built-up angle steel in the project design is analyzed. Taking the ]2713 tower in ＋800 kV DC transmission line from Nuozhadu to Guangdong Province as an example, this paper analyzes the design result and economic efficiency through establishing double models of large width angle steel and crisscross double built-up angle steel, and optimizing calculation, and concludes that the Q420 large width angle steel is worthy of large-scale application.
出处
《电网与清洁能源》
2011年第11期30-34,40,共6页
Power System and Clean Energy
关键词
大截面角钢
十字双角钢
特高压
临界计算长度
应力比
扭转屈曲
经济效益
large section angle steel
crisscross double built-up angle steel
UHV
critical effective length
stress ratio
torsion buckling
economic benefits
