Jun.EarthquakeResistantEngineeringandRetrofitting2023Jun.22023EarthquakeResistantEngineeringandRetrofitting2023年6月Vol.45,No.3第45卷第3期工程抗震与加固改造[文章编号]1002-8412(2023)03-0060-07D0I:10.16226/j.issn.1002-8412.2023.03.008端部加强型钢管阻尼器性能试验研究陈浩彬',钟根全1,?,周云",李家乐",何志明1(1.广州大学土木工程学院,广东广州510006;2.广东工业大学土木与交通工程学院,广东广州510006)【提要】传统钢管阻尼器因端部容易发生过早破坏,导致阻尼器耗能性能得不到充分发挥。本文对传统钢管阻尼器进行改进,提出一种新型端部加强型钢管阻尼器,介绍其构造形式及工作机理。设计钢管阻尼器和端部加强型钢管阻尼器各一个,对其进行低周往复加载试验,研究端部加强构造的合理性及端部加强型钢管阻尼器的力学性能。研究结果表明:1)设置加强钢管能够有效延缓钢管端部开裂,避免阻尼器因过早开裂而失去承载能力,充分发挥阻尼器耗能能力;2)端部加强型钢管阻尼器耗能性能好,其滞回曲线对称且饱满,等效阻尼比稳定在0.40左右,且能在小位移下进入屈服耗能状态;3)端部加强型钢管阻尼器较钢管阻尼器力学性能更优,屈服荷载和极限荷载相较钢管阻尼器分别提升18.78%和24.42%,二者初始刚度相近,屈服后刚度降低15.27%。[关键词]立端部加强;钢管阻尼器;低周往复加载试验;力学性能;消能减震[中图分类号]TU398*.9[文献标识码]]AExperimentalstudyonmechanicalpropertiesofend-strengthenedsteelpipedamperChenHao-bin',ZhongGen-quan'-2,ZhouYun',LiJia-le',HeZhi-ming'(1.CivilEngineeringInstitute,GuangzhouUniversity,Guangzhou510006,China;2.SchoolofCivilandTransportationEngineeringGuangdongUniversityofTechnology,Guangzhou510006,China)Abstract:Thetraditionalhollowsteelpipedamper(HSPD)ispronetohaveuntimelyfailureoftheendofdamper,makestheenergydissipationperformancenotfullydeveloped.Inthispaper,anewtypeofend-strengthenedsteelpipedamper(ESPD)isproposed,anditsconfigurationtypeandworkingmechanismareintroduced.Toverifythereasonablenessoftheend-strengthenedstructureandinvestigatethemechanicalpropertiesofESPD,onehollowsteelpipedamper(HSPD)specimenandoneESPDspecimenaredesignedforlow-frequencycyclicloading.Theresultsshowthatthestrengthenedsteelpipecaneffec...