搜索
形状记忆合金阻尼器在某古塔抗震加固中的研究与应用shapememoryalloy(SMA);damper;performancetest;ancienttower;structurewithenergydissipaters;constitutionalrelationship;hystereticcurve作为一种新型的功能材料,形状记忆合金在工程结构中有着良好的应用前景,也为结构振动控制技术提供了一个新途径。因此,研究SMA阻尼器及其在结构振动控制的应用进行研究,具有重要的理论意义和应用前景。本文以古塔建筑为背景,结合形状记忆合金在结构振动控制中的研究和应用现状,采用理论分析、试验研究和计算机模拟相结合的方法对形状记忆合金阻尼器在某古塔抗震加固中的应用进行了研究。文中首先对形状记忆合金在结构振动控制中的研究与应用现状进行了回顾和总结;其次对一种NiTi奥氏体超弹性形状记忆合金丝进行了材料性能试验,考察了这种记忆合金丝的超弹性耗能能力,同时分析了应变幅值,加载频率,循环次数以及工作温度等对其工作性能的影响;在此试验基础上,从形状记忆合金的本构关系入手,设计了一种单拉式形状记忆合金被动耗能阻尼器,建立了这种阻尼器的理论模型,接着通过计算机模拟了该阻尼器的滞回曲线;然后对本文的背景工程,即广州光塔进行了静动力分析,并将本文设计的SMA阻尼器应用于该塔,分析了其控制效果和规律,结果表明,本文所设计的SMA阻尼器可有效减小结构的地震响应,在同类古塔的抗震加固中有着很好的应用前景;最后论文还对SMA耗能减震结构的设计原则和方法进行了初步分析和探讨。Beinganewmaterial,ShapeMemoryAlloys(SMA)hasagoodapplicationprospectinstructureengineering;italsooffersanewapproachforthestructurevibrationcontrol.Hence,thestudyontheSMAdampersandthestructurevibrationcontrolwiththesedampershasconsiderablevalue.ThisthesispresentsastudyandanalysisofSMAdamperanditsapplicationforearthquakeresistantandstrengtheningoftheancienttowerthroughtheoryanalysis,experimentstudyandcomputersimulation,referringtothestudyandapplicationofSMAinstructurevibrationcontrol.First,thestudyandapplicationofSMAinstructurevibrationcontrolarereviewedandsummarized.ThefollowingisthematerialperformancetestsofakindofausteniticsuperelasticNiTishapememoryalloywire.Theenergydissipationcapabilityofthewireandtheinfluenceofstrainamplitude,loadingfrequency,aswellasnumberofcyclesonworkingperformanceoftheSMAwireandsoonareinvestigated.Basedonthetest,thewriterdesignsatensionedSMAdamper,setsupitstheoreticalmodelaccordingtotheconstitutionalrelationshipofSMA,andgetsitshystereticcurvethroughfiniteelementcomputersimulation.Thenthispapersbackgroundproject-GuangzhouGuangTowerisanalyzedinstaticanddynamicstate,especiallythecontroleffectivenessbyapplyingSMAdamperstothistower.ItisshownthatthistypeofSMAdamperdevelopedinthisprojectisveryeffectivetomitigateearthquakeresponsesofstructuresandhasagoodapplicationprospectintheearthquakeresistantandstrengtheningofthethesimilarantienttower.Finallytheseismicdesignprinciplesandmethodsforstructurewithenergydissipatersarestudiedinitially.