摘要
以500kV承德—平安城双回输电线路工程和±660kV宁东—山东直流输电线路工程为例,对耐张塔45°风荷载进行了计算,并与其他角度的风荷载进行了比较。分析了各种塔型在计入45°风荷载作用后,相对90°风荷载工况下铁塔塔腿内力的增加量以及对塔体质量的影响,提出了在超高压线路耐张塔设计中把45°风荷载作为非必要工况来进行考虑的建议。
Taking Chengde-Pingancheng 500 kV double-circuit line project and Ningdong-Shandong ±660kV DC power transmission line project as examples,in this paper,the 45° wind load on tension towers is calculated and the wind loads in different angles are compared.The internal force increase of tower legs and the influence on tower weight under 45° wind conditions are also analyzed,based on the comparison with 90° wind conditions.It was suggested that 45° wind should be considered as unnecessary condition for the design of tension tower of EHV transmission lines.
出处
《电力建设》
2012年第12期23-26,共4页
Electric Power Construction
基金
国家能源应用技术研究及工程示范科研项目(国能科技[2012]141号)
