摘要
特高压输电线路是生命线工程,但是现有的规范标准对特高压铁塔的抗震规定并不明确。为此对特高压建设中的典型杆塔酒杯型铁塔进行了模态分析和振型分解反应谱分析研究,使用了梁杆混合模型,考虑了地震作用效应与风荷载等其他荷载效应的组合,确定了地震作用下酒杯型铁塔的最不利杆件,通过在不同抗震设防烈度、不同的场地类型的条件下的振型分解反应谱分析,得到了地震荷载组合效应值与常规工况效应值的应力比,提出了特高压酒杯型输电杆塔抗震设防分级标准。研究表明,特高压酒杯型铁塔建立在8度以上地区时,需要进行抗震验算,对于不满足抗震要求的杆件,需要进行相应的加强。
The UHV transmission line is lifeline engineering, however, the existing standards for the seismic provisions of UHV tower are not clear. We carried out modal analysis and response spectrum analysis of a typical cup-type tower constructed in UHV project. Firstly, a mixed model of beam and truss element was used, while the combination of the seismic effect and wind load effect was considered. Then, the most dangerous bars of cup-type steel tower under the action of earthquake were determined, and the response spectra under different seismic intensity conditions and different site classification conditions were analyzed. Finally, the ratio of the combined effect value of the seismic load to the conventional condition effect value was obtained, and a classification standard for seismic fortification of UHV cup-type steel tower is proposed. The results show that the UHV cup-type steel tower is built in the earthquake intensity area over 8 degrees, seismic checking computation should be done, and the bars that do not meet the seismic requirements need to be strengthened.
作者
王飞
李正
杨风利
杜轲
孙景江
王伟明
WANG Fei1,2,3, LI Zheng3, YANG Fengli3, DUKe1,2, SUN Jingjiang1,2, WANG Weiming4(1. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China; 2. Key Laboratory of Earthquake and Engineering Vibration, China Earthquake Adminstration, Harbin 150080, China; 3. China Electric Power Research Institute, Beijing 100055, China; 4. China Civil Engineering Construction Corporation, Beijing 100038, Chin)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2018年第3期968-975,共8页
High Voltage Engineering
基金
国家电网公司科技项目(5299001352U7)
国家自然科学基金(51408568)~~
关键词
特高压
酒杯型铁塔
反应谱分析
地震烈度
场地类别
UHV
cup-type steel tower
spectrum analysis
seismic intensity
site classification
