摘要
大规格角钢肢宽与肢厚均较大,截面面积比常规输电铁塔角钢大得多,可大幅提高单构件承截力。分析认为单肢大规格角钢替代双拼组合角钢是可行的;以±800 kV特高压直流锦屏—苏南输电线路中JC1转角塔为分析对象,在相同的荷载条件下,主材分别采用Q420大规格角钢、双拼组合角钢进行设计、加工与真型试验,对主材采用Q420双拼组合角钢与Q420大规格角钢塔进行了经济性分析。结果表明:主材采用Q420大规格角钢的JC1塔比主材采用Q420双拼组合角钢JC1塔承载力要高,塔重减轻约5%,每基铁塔综合造价节省约7.4%。
Considering width and thickness of large width angle steel,the section area of large width angle steel is larger than that of normal angle steel.Application of large width angle steel can increase bearing capacity of the member.Therefore it is feasible that large width angle steel replaces double combined angle steels.Taking the JC1 tower for ±800 kV DC transmission line from Jinping to south Jiangsu Province,under the same design conditions,large width angle steel and double combined angle steels are used respectively in the main members of the JC1 tower.The full-scale test of the JC1 tower applying large width angle steel and double combined angle steels are introduced,and the economical efficiency is analyzed correspondingly.The results indicate that the bearing capacity of the JC1 tower increases when large width angle steel is used in the main members.The weight and the sum cost of the JC1 tower is also respectively reduced by about 5% and 7.4%.
出处
《电力建设》
2010年第6期65-69,共5页
Electric Power Construction
基金
国家电网公司科技项目(JC71-09-014)
关键词
大规格角钢
双拼组合角钢
真型试验
特高压杆塔
主材
经济性分析
large width angle steel
double combined angle steel
full-scale test
UHV tower
main members
economic analysis
