华南地震2026，Vol.46Issue(2)：65-71,7.DOI:10.13512/j.hndz.2026.02.09
±800kv直流输电塔评估不同地震需求参数的易损性分析
Vulnerability Analysis of±800 kv DC Transmission Towers with Evaluating Different Seismic Demand Parameters
摘要
Abstract
Transmission tower is an important carrier for the transmission of electric energy,and its seismic capac-ity is critical for maintaining the stability of the power system.In order to study its vulnerability under seismic ac-tion,a double-circuit transmission tower is taken as the object of study,and the tower-line-insulator system is con-structed that incorporates the role of insulator strings in the tower-line coupling system.The performance of four dif-ferent seismic demand parameters are compared according to different seismic intensity levels,followed by the use of incremental dynamic analysis to derive the fragility curves for the collapse of transmission towers under seismic loading.The results of the study show that:the tower line system considering insulator strings can effectively con-trol the effect of conductor swaying on the fragility of transmission towers.For the DC double-circuit transmission tower line-insulator system,using the yield failure of transmission tower components as the criterion for collapse yields the most representative results.The peak ground acceleration corresponding to 100%collapse probability is approximately 1.4 g,and with the increase of seismic intensity,the seismic performance of the transmission tower gradually deteriorates.The seismic damage of DC double-circuit transmission towers mainly occurs at the lower cross-arm region of the mid-tower section,and the seismic collapse resistance gradually decreases with the in-crease of the tower height.关键词
输电塔线体系/绝缘子串/地震强度/地震需求参数/结构易损性Key words
Transmission tower line system/String insulator/Earthquake intensity/Seismic demand parame-ters/Structural fragility分类
信息技术与安全科学引用本文复制引用
李茂峰,李小军,钱玉,陈刚,刘波,陈强,唐勇,李克华,甘朝阳,荣棉水..±800kv直流输电塔评估不同地震需求参数的易损性分析[J].华南地震,2026,46(2):65-71,7.基金项目
北京工业大学重点实验室重点项目(2023) （2023）
研发专项"面向跨断层重大基础设施的大地震危险性分析关键技术"之课题"大型地震断层近地表位错式和分布式变形定量评价与预测"(2023YFC3007401)联合资助. （2023YFC3007401）
