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ID:33893649
大小:1.25 MB
页数:7页
时间:2019-03-01
《中空夹层钢管再生混凝土短柱受压性能分析》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17卷第4期建筑材料学报Vo1.17.NO.42014年8月JOURNALOFBUILDINGMATERIALSAug.,2014文章编号:1007—9629(2014)04—0627—07中空夹层钢管再生混凝土短柱受压性能分析董江峰,袁书成,侯敏,王清远(1.四川大学建筑与环境学院,四川成都610065;2.四川大学能源工程安全与灾害力学教育部重点实验室,四川成都610065)摘要:为了研究震后建筑废弃物再生混凝土材料及其钢管短柱的力学性能,以混凝土的再生骨料取代率为主要参
2、数,分别进行了10个圆中空和10个方中空夹层钢管再生混凝土短柱的轴压试验研究,比较了试件的荷栽一变形曲线和极限承载力关系.结果表明:随着再生骨料取代率的增大,试件的极限承载力逐渐降低,100再生骨料取代率的圆中空试件和方中空试件比原生骨料试件的极限承载力分别下降16和10.在确定试件钢材和核心再生混凝土的应力一应变模型的基础之上,利用数值计算方法对中空夹层钢管再生混凝土的荷载一应变全过程关系进行了分析,理论计算结果与试验结果吻合较好.建立了中空夹层钢管再生混凝土轴压试件极限承载力的实用验算方法.关键词:再生混凝土
3、;钢管混凝土柱;力学行为;承载力中图分类号:TU375.1文献标志码: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
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