IndustrialConstructionVol.53,No.4,2023工业建筑2023年第53卷第4期1大跨越输电塔双平臂抱杆的风洞试验研究∗夏顺俊赵俊马龙张仁强戴如章李锡民(江苏省送变电有限公司,南京210028)摘要:国家大跨越输电线路建设方兴未艾,这些新建的长距离电力输送通道档距大且铁塔高,同时面临恶劣环境的严峻挑战。在大跨越超高输电铁塔的施工中,双平臂抱杆是最重要的吊装施工装备。在施工期内高空作业的双平臂抱杆面临复杂的风环境,高长细比的柔性结构特征也对其抗风安全提出了更高的要求。针对组立江阴长江大跨越385m高塔的双平臂抱杆,开展了高频天平测力风洞试验研究。在多个来流风向角下,针对各个抱杆构件的多种工作姿态完成了高频天平测力试验。由风洞试验可知:抱杆标准节整体体型系数在各风向角下的变化存在线性规律;抱杆整体结构体型系数的规范取值会偏于风险,应在抱杆结构抗风验算中予以重视。同时,还提出了基于构件总计法的抱杆标准节风荷载精细化计算方法。关键词:抱杆结构;超高输电铁塔;风洞试验;体型系数;构件总计法DOI:10.13204/j.gyjzG21100918WindTunnelTestStudyonCraneStructurewithDouble-Flat-ArmDerrickforLong-SpanTransmissionTowersXIAShunjunZHAOJunMALongZHANGRenqiangDAIRuzhangLIXimin(JiangsuElectricPowerTransmission&TransformationCorporation,Nanjing210028,China)Abstract:Theconstructionoflong-spanpowertransmissionlinesinChinaisbooming.Thesetransmissionlinesrunthroughlargedistanceswithhigh-risetowers,andarefacingseverechallengesfromharshenvironments.Forconstructionoflong-spanandultrahigh-risetransmissiontowers,thecranestructurewithdouble-flat-armderrickhasbecomethemostimportantliftingequipment.Duringtheconstructionprocess,thecraneoperateshastofacethecomplexandextremewindenvironment.Thecranestructurewithalargeslendernessratioisquitewind-sensitive.Windtunneltestswerecarriedoutforthedouble-flat-armderrickforerectingthe385mhightowercrossingtheYangtzeRiverinJiangyin.High-frequencyforce-balancewindtunneltestswereconductedfordifferentworkingpositionsofflatarmsundervariousincomingwindangles.Theobtainedshapecoefficientsofthestandardtowerbodysegmentexihibitedalinearrelationwiththeincomingwindangles.Itwasalsofoundthattheoverallshapecoefficientsofthecranestr...
