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时间:2019-02-25
《钢筋混凝土框架夹心节点设计方法》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、学兔兔www.xuetutu.com第32卷第3期JournalofCivil.Architectural&EnvironmentalEngineering土木建筑与环境工程V0L32No.32O1O年06月Jun.2010钢筋混凝土框架夹心节点设计方法杨治洪,李英民,刘建伟,韩星(1.重庆大学土木工程学院,重庆400045;2.重庆市南岸区建委,重庆400060)摘要:为给出钢筋混凝土框架夹心节点的设计方法,依据试件破坏特征等试验结果提出了验算内容与设计准则,通过对夹心节点抗震性能影响因素的分析及
2、其与传统节点的对比提出了设计参数限值,基于试验试件的承载力并结合非线性有限元模拟的结果提出了核心区承栽力验算公式。结果表明:为达到所需的位移延性并满足承载力要求,需设置剪压比、轴压比、柱梁混凝土强度比、最小配箍量等参数限值约束夹心节点适用范围;通过核心区受压验算、受剪验算保障节点的承载力必要时可采取适当的加强措施;此外需要采取合理的构造措施避免梁筋过度的粘结退化。关键词:夹心节点;拟静力试验;有限元;设计方法中图分类号:TU375.4文献标志码:A文章编号:1674—4764(2010)03—003
3、5—06DesignMethodofReinforcedConcreteSandwichBeam’columnJointsYANGZhi—Hong~,LIYing—Min,LIUJian-Wei,HANJun(1.CollegeofCivilEngineering,ChongqingUniversity,Chongqing400045,P.R.China2.Nan’anConstructionCommittee,Chongqing,400060,P.R.China)Abstract:Theexper
4、imentalresultsofreinforcedconcretesandwichbeam—columniointswerestudiedintensivelyandfiniteelementmethodsimulationofsuchjointswereperformedforthesakeofdesignmethod.Basicdesigncriterionandcomputationcontentswereprovidedaccordingtofailuremodeofspecimensan
5、dotherexperimentalresults.Andthelimitsofparameterswereproposedbasedontheanalysisofseismicbehaviorinfluencefactorsandcomparisonoftraditionaljointsandsandwichjoints.Hence,formulasofloadresistantcapacitywereacquiredbytheresultsofloadresistantcapacityofspe
6、cimensandnonlinearfiniteelementmethodsimulation.Itisfoundthatthreemeasuresshouldbetakenforsandwichjointsinordertoreachdemandedductilityandloadresistantcapability.Firstly,severalparametersshouldbelimited,includingshear—compressionratio,axialloadratio,ra
7、tioofbeamconcretestrengthtocolumnconcretestrength,andminimalamountoftransversereinforcementofjoint.Secondly,shearloadresistantcapacityandaxialcompressiveloadresistantcapacityshouldbecomputedtoensureloadresistantcapabilityofjoint,andessentialstrengthenm
8、easurescouldbeappliedifnecessary.Thirdly,appropriateconstructiondetailsshouldbetakentoavoidreducingofbeambaranchoragecapacity.Keywords:SandwichJoints,Quasi—statictest,FiniteElementMethod,DesignMethod对于高层建筑中普遍存在的柱混凝土强度高于强度与柱相同的节点)相比,此类节点
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