重庆大学学报2025，Vol.48Issue(10)：34-44,11.DOI:10.11835/j.issn.1000-582X.2025.252
特高压大跨越输电塔线风灾易损性准静态分析
Quasi-static analysis of wind-induced fragility for ultra-high voltage long-span transmission tower lines
摘要
Abstract
Ultra-high voltage(UHV)long-span(LS)transmission lines,characterized by large tower heights and long spans,are highly susceptible to wind loads.Wind fragility analysis is an essential method to assess their reliability under wind-induced actions.Using an UHV-LS transmission tower in Anhui Province as a case study,this research applies random wind vibration response theory and China's current overhead transmission line loading specifications to determine the structural response distribution under wind loads.The analysis incorporates uncertainties in structural material properties to establish the probabilistic distribution of wind load-carrying capacity.Performance levels are quantitatively evaluated using tower-top displacement and corrected inter-segment displacement angles as indicators,leading to the development of wind fragility curves.The results indicate that the quasi-static wind effect distribution of the transmission tower-line system can be obtained using probability-based methods for the first time.The fragility assessment shows that performance levels based on tower-top displacement are more conservative than those based on modified inter-segment displacement angles.Additionally,as structural damage intensifies,the influence of material uncertainty on load-bearing capacity becomes more pronounced.Overall,wind fragility analysis shows that UHV towers exhibit good wind reliability under design wind loads,although their wind-induced failure shows brittle characteristics.关键词
特高压输电体系/大跨越/风灾易损性/性能水准/结构可靠性Key words
UHV transmission lines/long-span/wind fragility/performance levels/structural reliability分类
信息技术与安全科学引用本文复制引用
施芷榆,张树林,孟宪乔,郑治祥,李正良..特高压大跨越输电塔线风灾易损性准静态分析[J].重庆大学学报,2025,48(10):34-44,11.基金项目
中国能源建设集团安徽省电力设计院有限公司科技项目.Supported by Technology Project of China Energy Construction Group Anhui Electric Power Design Institute Co.,Ltd. （）
