超細晶粒鋼筋粘結(jié)錨固性能的研究.pdf

1、授予單位代碼!Q璺52學號或申請?zhí)朡魚Q1383密級——鄭州大學碩士學位論文論文題目：超細晶粒鋼筋粘結(jié)錨固性能的研究作者姓名：學科門類：專業(yè)名稱：導師姓名、職稱：李千工學結(jié)構(gòu)工程徐有鄰研究員劉立新教授2007年04月20B鄭州大學碩t學位論文AbstractUltrafmegrainsteelbarisanewkindofclosegrainhotribbedbarwhichismadebycontrollingthetemperatu

2、reofrollingIthasmanykindsofcharacteristicssuchashighstrengthandgoodductilityInthispaper，wecardedouttheresearchaboutthemechanicalcapability(inchding400MPaand500MPasteelbar)，especiallythebondanchoragepropertyinconcreteoful

3、trafinegrainsteelbarsteelbartosolvetheproblemontheanchoragedesignofthisnewkindofsteelbarinconcretestructuresInadditionwecardedotlttheresearchaboutthebondanchoragepropertyofsymmetricribbedbarandasymmetric—ribbedbarThemech

4、anicalcapabilitytestprovesthatthestrengthandtheelongationofultrafmegrainsteelbarnotonlysatisfytherequirementsinchinesestandard，butalsoachievethedemandsinEuroeodeSoitCanbeusedinseismicdesignstructuresAndinthedesignofconcr

5、etestructure，thevaluesofcharacteristictensileyieldstrength厶canbesetas500MPa，thevalueofmodulusofelasticityEcanbesetas21x105N／mm2Accordingto48pullouttestsofultragrainsteelbarsand18pullouttestsofthesymmetricribbedbarandasym

6、metric—ribbedbar，theeffectsofconcretestrength，thicknessofconcretecover，anchoragelength，andstirrupralioeteforthebond—anchoragepropertyhavebeenanalysedBywayofexperimentalstatisticalreg一一ression。thecalculatingformulaofultim

7、ateboIld—anchoringstrengthhasbeenestablishedTheresultisingoodagreementwithwhatcomesfromtheformulaofcrescenthotribbedbarproposedbythespecialbond—anchorageresearchgroupofchinesecodefordesignofconcretestructureThedesignofan

8、choringlengththroughreliabilityanalysishasbeenproposed，theresultshowsthattheanchoringlengthforultrafinegrainsteelbarCanbedesignedbytheformulainexistingcodefo，designofconcretestructures(GB50010—2002)KeyWords：ultra—finegra