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1、學(xué)兔兔www.xuetutu.com第17卷第4期建筑材料學(xué)報(bào)Vo1.17.NO.42014年8月JOURNALOFBUILDINGMATERIALSAug.,2014文章編號(hào):1007—9629(2014)04—0627—07中空夾層鋼管再生混凝土短柱受壓性能分析董江峰,袁書成,侯敏,王清遠(yuǎn)(1.四川大學(xué)建筑與環(huán)境學(xué)院,四川成都610065;2.四川大學(xué)能源工程安全與災(zāi)害力學(xué)教育部重點(diǎn)實(shí)驗(yàn)室,四川成都610065)摘要:為了研究震后建筑廢棄物再生混凝土材料及其鋼管短柱的力學(xué)性能,以混凝土的再生骨料取代率為主要參
2、數(shù),分別進(jìn)行了10個(gè)圓中空和10個(gè)方中空夾層鋼管再生混凝土短柱的軸壓試驗(yàn)研究,比較了試件的荷栽一變形曲線和極限承載力關(guān)系.結(jié)果表明:隨著再生骨料取代率的增大,試件的極限承載力逐漸降低,100再生骨料取代率的圓中空試件和方中空試件比原生骨料試件的極限承載力分別下降16和10.在確定試件鋼材和核心再生混凝土的應(yīng)力一應(yīng)變模型的基礎(chǔ)之上,利用數(shù)值計(jì)算方法對(duì)中空夾層鋼管再生混凝土的荷載一應(yīng)變?nèi)^程關(guān)系進(jìn)行了分析,理論計(jì)算結(jié)果與試驗(yàn)結(jié)果吻合較好.建立了中空夾層鋼管再生混凝土軸壓試件極限承載力的實(shí)用驗(yàn)算方法.關(guān)鍵詞:再生混凝土
3、;鋼管混凝土柱;力學(xué)行為;承載力中圖分類號(hào):TU375.1文獻(xiàn)標(biāo)志碼:Adoi:10.3969/j.issn.1007—9629.2014.04.012MechanicalBehaviorofRecycledAggregateConcreteFilledDoubleSkinSteelTubeColumnsDONGJiangfeng,YUANShucheng,HOUMin。,WANGQingyuan’(1.CollegeofArchitecture&Environment,SichuanUniversity,Che
4、ngdu610065,China+2.KeyLaboratoryofEnergyEngineeringSafetyandDisasterMechanics,MinistryofEducation,SichuanUniversity,Chengdu610065,China)Abstract:Inordertostudythemechanicalpropertiesoftherecycledaggregateconcreteanditssteeltubecolumnsmadefromearthquakewaste,t
5、wentysteeltubecolumnsfilledwithrecycledaggregateconcrete,whichcomprisingoftendoubleskincircularandtendoubleskinsquaresectionscolumns,wereprepared.Themainexperimentalparametersincludedthereplacementratioofrecycledcoarseaggregates,i.e.0,25,50,75and100,andthecro
6、sssectionsofsteeltubecolumns,i.e.circularorsquaresections.Theresultsshowthatthestructuralperformanceofsteeltubecolumnsfilledwithrecycledaggregatecon—creteissimilartothatfilledwithnormalconcrete.Theload-deformationcurvesandthestrainsresponsewerecompared.Theres
7、ultsalsoshowthattheloadcarryingcapacitybecomesweakerasthereplacementratioofrecycledcoarseaggregatesishigher.Thecompressiveloadversusdisplacementofthesteeltubecolumnswerecalculatedaccordingtothestress—strainrelationshipofthesteeltubesandtherecycledag—gregateco
8、ncrete.Itisfoundthatthecalculatedresultsareingoodagreementwiththeexperimentalones.Finally,theloadcarryingcapacityofthecolumnswasalsocalculatedbytherelativedesignrules.There—suitsshowthatt