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1、學(xué)兔兔www.xuetutu.com第32卷第3期JournalofCivil.Architectural&EnvironmentalEngineering土木建筑與環(huán)境工程V0L32No.32O1O年06月Jun.2010鋼筋混凝土框架夾心節(jié)點設(shè)計方法楊治洪,李英民,劉建偉,韓星(1.重慶大學(xué)土木工程學(xué)院,重慶400045;2.重慶市南岸區(qū)建委,重慶400060)摘要:為給出鋼筋混凝土框架夾心節(jié)點的設(shè)計方法,依據(jù)試件破壞特征等試驗結(jié)果提出了驗算內(nèi)容與設(shè)計準(zhǔn)則,通過對夾心節(jié)點抗震性能影響因素的分析及
2、其與傳統(tǒng)節(jié)點的對比提出了設(shè)計參數(shù)限值,基于試驗試件的承載力并結(jié)合非線性有限元模擬的結(jié)果提出了核心區(qū)承栽力驗算公式。結(jié)果表明:為達(dá)到所需的位移延性并滿足承載力要求,需設(shè)置剪壓比、軸壓比、柱梁混凝土強度比、最小配箍量等參數(shù)限值約束夾心節(jié)點適用范圍;通過核心區(qū)受壓驗算、受剪驗算保障節(jié)點的承載力必要時可采取適當(dāng)?shù)募訌姶胧?;此外需要采取合理的?gòu)造措施避免梁筋過度的粘結(jié)退化。關(guān)鍵詞:夾心節(jié)點;擬靜力試驗;有限元;設(shè)計方法中圖分類號:TU375.4文獻(xiàn)標(biāo)志碼:A文章編號: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,F(xiàn)initeElementMethod,DesignMethod對于高層建筑中普遍存在的柱混凝土強度高于強度與柱相同的節(jié)點)相比,此類節(jié)點