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1、第30卷,第3期世界地震工程V01.30No.32014年9月WORLDEARTHQUAKEENGINEERINGSep.2014文章編號(hào):1007—6069(2014)03—0086—07低周反復(fù)荷載下再生混凝土框架中間節(jié)點(diǎn)的受力性能彭有開(kāi),吳徽,梁能山,焦志超,高全臣(1.中國(guó)礦業(yè)大學(xué)(北京)力學(xué)與建筑工程學(xué)院,北京100083;2.北京建筑大學(xué)工程結(jié)構(gòu)與新材料北京市高等學(xué)校工程研究中心,北京100044;3.城市建設(shè)研究院,北京100120)摘要:對(duì)足尺的3個(gè)再生混凝土框架中間節(jié)點(diǎn)與1個(gè)普通混凝土節(jié)點(diǎn)進(jìn)行低周反復(fù)荷載試驗(yàn),主要目的為考查在低
2、軸壓比情況下再生混凝土節(jié)點(diǎn)發(fā)生粘結(jié)滑移破壞的可能性。各試件符合“強(qiáng)柱弱梁、強(qiáng)節(jié)點(diǎn)”的設(shè)計(jì)原則。結(jié)果表明,在低軸壓比情況下,再生混凝土節(jié)點(diǎn)試件發(fā)生顯著的粘結(jié)滑移,延性性能和耗能性能差,不能滿足抗震設(shè)計(jì)的要求,而相應(yīng)的普通混凝土節(jié)點(diǎn)實(shí)現(xiàn)了梁鉸破壞機(jī)制,延性和耗能性能良好。為獲得良好的抗震性能,應(yīng)對(duì)再生混凝土節(jié)點(diǎn)區(qū)錨固進(jìn)行合理設(shè)計(jì),如采用可靠的機(jī)械錨固措施,建議進(jìn)一步開(kāi)展再生混凝土框架節(jié)點(diǎn)區(qū)粘結(jié)機(jī)理和錨固措施研究。關(guān)鍵詞:再生混凝土;中間節(jié)點(diǎn);抗震性能;粘結(jié)滑移中圖分類(lèi)號(hào):TU375.4文獻(xiàn)標(biāo)志碼:ABehaviorofRecycledConcrete
3、InteriorBeam——columnJointsunderCyclicLoadingPENGYoukai,Wuhui2LIANGNengshan。,,JIAOZhichao,GAOQuanchen(1.SchoolofMechanicsandCivilEngineering,ChinaUniversityofMiningandTechnology(Beijing),Beijing100083,China;2.BeijingHigherInstitutionEngineeringResearchCenterofCivilEngineeringS
4、tructureandRenewableMaterial,BeijingUniversityofCivilEngineeringandArchitecture,Beijing100044,China;3.ChinaUrbanConstructionDesignandResearchInstitute,Beijing100120,China)Abstract:Threefull—scalerecycledconcreteinteriorjointsandonenormalconcretejointaretestedundercyclicloadin
5、g.Thetestsaimatexaminingthepossibilityofbondfailureinrecycledconcreteinteriorjointswithlowaxialloadratios.Allspecimensaredesignedfollowingthedesignphilosophyofstrongcolumn—weakbeamandstrongjointapproach.Theresultsshowthatsignificantbondslipoccursinrecycledconcretejointsunderl
6、owaxialloadra—tios.Theyexhibitlowductilityandenergydissipationwhichcannotmeettherequirementsofseismicdesign.How—ever,thecorrespbndingnormalconcretespecimenachievesbeamhingemechanismandgainsgoodductilityanden—ergydissipation.Inordertoattainsatisfactoryseismicperformance,itissd
7、ggestedthattheanchoragedetailingshouldbereasonablydesignedforrecycledconcretejoints,suchastakingreliablemechanicalanchorage.Iisrec—ommendedthatthebondmechanismandanchoragemeasuresinrecycledconcreteframejointsshouldbefurtherin—vestigated.Keywords:recycledconcrete;interiorbeam—
8、columnjoint;seismicbehavior;bondslip引言框架節(jié)點(diǎn)的主要作用為傳遞框架梁柱的內(nèi)力,同時(shí)為梁柱縱筋提供錨