摘要
特高压灵绍线长江大跨越输电线路铁塔具有高、大、重等特点,采用了落地双平臂抱杆对其进行施工。运用有限元方法对工程所用的双平臂抱杆及双平臂抱杆与铁塔的耦合结构进行了力学性能分析,分别得出多种工况下这两种结构的抱杆整体最大位移、最大应力和腰环拉线最大拉力。结果表明:当风向为45°方向时,抱杆处于最不利状态;与单抱杆结构相比,耦合结构中抱杆的最大位移增大,腰环拉线拉力减小。
The Yangtze River long-span ultra high voltage transmission line tower of Lingshao has the characteristics of high-rise,large-scale and large-mass. The tower was constructed by grounded double flat-arm holding pole. The mechanical property of the double flat-arm holding pole,as well as the coupling structure of double flat-arm holding pole and trasmission line tower,were analyzed by the finite element method. The overall maximum displacement and stress of the pole,the maximum tension of the girdle cable under a variety of conditions were obtained respectively. The results indicated that 45° wind direction might lead to the most unfavorable state for the pole. Compared with the single pole structure,the maximum displacement of the pole in coupling structure increased,while the maximum tension of the girdle cable decreased.
出处
《钢结构》
北大核心
2016年第3期59-61,共3页
Steel Construction
基金
国家电网公司交流建设分公司科技项目(SGZB0000JLJS1400072)
关键词
双平臂抱杆
铁塔
耦合结构
有限元
力学性能
double flat-arm holding pole
steel tower
coupling structure
finite element
mechanical property
