重庆大学学报2026，Vol.49Issue(1)：70-81,12.DOI:10.11835/j.issn.1000-582X.2024.052
基于规范表达式的服役杆塔抗风时变可靠度分析
Time-dependent reliability analysis of service towers under wind load based on a standard formula
摘要
Abstract
Conventional reliability assessments of transmission towers using standard calculation formulas usually neglect corrosion-induced performance degradation,and the recommended range of wind load effect ratios is typically subjective.To address these limitations,this study focuses on service towers and proposes a time-dependent reliability analysis method under wind load within the framework of the standard formula.First,a resistance degradation model considering corrosion effects is developed by integrating environmental conditions and material type into the corrosion rate.Second,the wind load effect ratio is used as a random variable and its statistical characteristics are obtained by distribution fitting using real tower monitoring data.Third,the equivalent normalization(JC)method is used to calculate the reliability index of the service tower based on the standard formula.Finally,the sensitivity of the reliability index to key parameters in the standard formula is quantitatively evaluated.Results show that the wind load effect ratio approximately obeys a generalized extreme value distribution and exhibits strong correlation with tower reliability.Moreover,member initial thickness,atmospheric corrosivity and wind load adjustment coefficients all significantly influence reliability evolution.Specifically,higher atmospheric corrosivity accelerates reliability degradation,while the influence of corrosion decreases as member initial thickness increases.Additionally,a higher wind load adjustment coefficient corresponds to a higher reliability index.关键词
输电杆塔/时变可靠度/抗力退化模型/设计规范/风荷载效应比Key words
transmission tower/time-dependent reliability/resistance degradation model/design specification/wind load effect ratio分类
信息技术与安全科学引用本文复制引用
王松涛,冯衡,曾二贤,杨雅婷,余书君,李正良..基于规范表达式的服役杆塔抗风时变可靠度分析[J].重庆大学学报,2026,49(1):70-81,12.基金项目
中南院重大科技专项(40-1A-KY202019-T201) （40-1A-KY202019-T201）
国家电网科学技术项目(SGZJJY00SJJS2310014).Supported by the Research on Structural Reliability Assessment and Life Prediction of Overhead Transmission Lines(40-1A-KY202019-T201),the Science and Technology Project of State Grid Corporation of China(SGZJJY00SJJS2310014). （SGZJJY00SJJS2310014）
