基于撓度的體外預(yù)應(yīng)力梁應(yīng)力增量分析方法.pdf

1、分類號：TU310710—20059004』Illllflrrlllrrlllfllllll!lfllllrrrlfrjillY1526857壤步犬海碩士學(xué)位論文基于撓度的體外預(yù)應(yīng)力梁應(yīng)力增量分析方法導(dǎo)師姓名職稱申請學(xué)位級別論文提交日期學(xué)位授予單位胡志旺宋一凡教授答辯委員會主席學(xué)位論文評閱人賀拴海教授周勇軍副教授張倩教授AbstractComparedwithtraditionalprestressing，externalprestre

2、ssingsystemhasitsownmerits眥iswhythiskindofstructurehasbeenwidelyusedandconstantlyinnovatedallovertheworldinrecentyearsBut，AsfarAsexistinginformationisconcerned，thestudyandapplicationofthisnewtechniquearealmostlimitedinex

3、istingstructural’Sstrengthening，mechanicalbehaviorstudiesofnewconcretestructuralwithexternalprestressingstilllackverymuchBasedontheanalysisofalargenumberofpilotstudiesathomeandabroadresearchdata，specifications，aswellasth

4、ebasisofralatedliterature，throughthefivesimplysupportedbeamandfourtwo—spancontinuousbeamtest，moresvstematicanalysisofstressincrementanddeflectiondeformationoftheprincipleandmethodofcaculation，specificresearchworkareasfol

5、lows：Ontheinvitrodevelopmentofprestressedconcretestructuresandresearch，comprehensiveanalysisofexternallyprestressedstructuresattheultimatebearingcapacityunderawidevarietyofcomputingtheory，anddiscussedtheirrespectiveadvan

6、tagesanddisadvantagesAtloadslowerbodyextemaltendonsofbeamdisplacementandnothingtodowiththestressinvitrotendonforcecanchangetheentirerootbeamdeformationconditionsareThroughtheincrementalstressanddeflectionanalysisoftheinh

7、erentlawchanges，derivedfromadifferentclothreinforcementforms，underdifferentloadingmodechangesbasedonthedeflectionformulaforcalculatingthestressincrement，theformulaappliestosimplysupportesbeamsandstaticallyindeterminatebe

8、amsSpecimensof9externalprestressingconcretebeams，including5simply。supportedbeamsand4twospancontinuousbeams，andthestaticloadtestswerefinishedSeveralcriticaldatesasdeformations，strainsofthebeamsandthestressincrementsofexte

9、rnaltendonsweremeasured，andthetestresultswereanalyzedAnalysisoftestresultsfoundthatinvitrotendonforceandthestressincrementinthedeflectionofbeamcross—linearorapproximatelinearrelationshipAftercomparingcalculatedvalueswith

10、experimentalvaluesofstressincremengofexermallyprestressedtendonsbasedonthedeflectionformulaforcalculatingthestressincrementbythisformulaiSalmostasaccurateastheresultofthetestKeyWords：externalprestressing，Concretebeam，str