IndustrialConstructionVol.53,No.4,2023工业建筑2023年第53卷第4期15基于首次超越破坏的输电塔强风易损性分析∗赵子涵1肖凯2肖仪清3李朝3张文通3(1.深圳职业技术学院建筑工程学院,广东深圳518055;2.广东电网公司电力科学研究院,广州510080;3.哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳518055)摘要:参照输电塔现行设计规范,首先,获得了风荷载作用下单塔结构的能力曲线,并依据结构构件的受力特征,以塔顶位移角为指标讨论了3种首次超越破坏的界限状态。其次,基于拉丁超立方抽样技术获得的结构等效静力计算样本,对界限值划分的合理性进行验证。最后,结合不确定分析样本的统计特性,计算塔架在最不利风向角下,不同顶点位移角限值的易损性曲线,并对比了采用动力可靠性分析获得的“三塔两线”体系计算结果。HCLPF(HighConfidence,LowProbabilityofFailure)对应风速值表明,不同方法的计算结果较为接近,但单塔结构计算效率较高。关键词:输电塔;能力曲线;易损性曲线;HCLPF;首次超越破坏DOI:10.13204/j.gyjzG20121012FragilityAnalysisofTransmissionTowerswithaStrongWindBasedonFirst-PassageFailureCriterionZHAOZihan1XIAOKai2XIAOYiqing3LIChao3ZHANGWentong3(1.DepartmentofCivilEngineering,ShenzhenPolytechnic,Shenzhen518055,China;2.ElectricPowerResearchInstituteofGuangdongPowerGridCo.,Ltd.,Guangzhou510080,China;3.CivilandEnvironmentalEngineering,HarbinInstituteofTechnology(Shenzhen),Shenzhen518055,China)Abstract:Thecapacitycurvesoflatticetransmissiontowersunderwindloadingwerefirstcalculatedbasedoncurrentdesigncodes.Accordingtothestresscharacteristicsofstructuralcomponents,threeperformanceindexesunderthefirst-passagefailurecriterionwerediscussedbyusingthedisplacementangleofthetowertopasanindicator.Then,theseindexeswerevalidatedbyimplementingthestatisticalanalysisbasedontheLatinHypercubeSampling(LHS)ofequivalentstaticcalculation.Thirdly,thefragilitycurvesunderunfavorablewinddirectionswerecalculatedwiththeuncertaincharacteristicsofthevertexdisplacementangle.Theseresultswerevalidatedwithanoverheadtransmissionline-towersystembyusingthefirst-passagefailuretheory.WindspeedscorrespondingtotheHCLPF(HighConfidence,LowProbabilityofFailure)resultsshowedthattheres...
