基于规范表达式的服役杆塔抗风时变可靠度分析

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中图分类号：TM75；0213 文献标志码：A 文章编号：1000-582X（2026）01-070-12

引用格式：，，，等.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.

Abstract： Conventionalreliability 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 timedependent reliability analysis method under wind load within the framework of the standard formula.First， a resistance degradation model considering corrosion efects is developedby integrating environmentalconditions and material type into thecorrosionrate.Second，thewind load effect ratio isused as arandomvariable and its statistical characteristics areobtained by distribution fiting using realtower monitoring data.Third，the equivalent normalization （JC）method is used tocalculate thereliability indexof theservice tower based on the standard formula.Finally，the sensitivityofthereliability index to keyparameters in the standard formula is quantitatively evaluated.Resultsshow that the wind load efect ratio approximately obeys a generalized extreme value distributionand exhibits strong correlation with tower reliability.Moreover，member initial thicknes，atmospheric corrosivity and wind load adjustment coefficients allsignificantly influence reliability evolution. Specifically， higher atmospheric corrosivity accelerates reliability degradation，while the influence of corrosion decreasesas member initial thickness increases.Additionaly，ahigher wind load adjustment coefficientcorresponds toa higher reliability index.

Keywords： transmision tower;time-dependent reliability; resistance degradation model; design specification; windloadeffect ratio

输电杆塔一旦发生倒塌、破坏，就会对生命安全及社会财产造成威胁，其服役期间的可靠性一直倍受关注。（剩余13481字）