自复位钢筋接头设计、试验及模型参数识别

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关键词：自复位；钢筋接头；预紧碟簧；Bouc-Wen模型；粒子群算法 中图分类号：TU599 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202304031

Design， test and parameter identification of self-centering rebar splices

LYUYang1，LIQiuhu1²，DONG Cui1 （1.Tianjin Key Laboratory of Civil Structure Protection and Reinforcement，Tianjin Chengjian University， Tianjin3Oo384，China；2.China Contruction Third BureauFirstEngineeringCo.，Ltd.，Wuhan430040，China）

Abstract：Post-tensioned prestress，self-centeringbraceandshape memoryaloy（SMA）arethemain ways torealizetheself-cen teringofthestructures.However，theonstructionofposttensionedprestressisomplextheconcentratedforcegeneratedbyself centering brace maycause joint damage，and the SMA is expensive.The discsprings are preloaded toprovide theself-centering force.Aselfcenteringebarspliceisdevelopedtoconnectthelongitudinalrebarsinthereinforcedconcretestructures.Tecalcula tionmethodoftestifess，preloadandefectivestrokeoftheself-centeringrebarspliceisestablished.Fourrebarsplices withdifferentpreloadforcestifessandefectivestrokeaedesigndandmanufactured，andthemechanicalpropertiesoftebrsplices aretested.Theparametersof terebarspliceadoptingtheBouc-Wenmodelareidentifiedbasedonparticleswarmoptimizationalgorithm.Theresultsshowthattheself-centeringrebarsplicehasastablehalf-flaghystereticcurveandexcellentselfcenterigper formance.TheBouc-Wenmodelcanaccuratelydescribethehystereticcharacteristicsoftherebarsplice，andthefitingdataare in good agreement with the test data.

Keywords：self-centering;rebar splices;pre-loaded disc springs;Bouc-Wen model;particle swarm algorithm

基于“三水准”的建筑抗震设计理念虽然能保证人员生命安全，但是建筑功能在震时维持、震后快速恢复方面存在严重不足。（剩余13350字）