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1、重慶大學(xué)碩士學(xué)位論文II英文摘要ABSTRACTInrecentyears,manyeconomical,reasonable,artisticbridgestructureshaveappearedwiththerapiddevelopmentofbridgeconstructioninourcountry.Becauseofitslinearandliveliness,convenientconstruction,highstrengthandstrongspanningability,long-spancon
2、tinuousrigidframebridgewithhighpiersisfavoredbydesigners,andisappliedwidelyrecently.Undertheactionoftemperatureloadandcreepshrinkageofconcrete,long-spancontinuousrigidframebridgewillproducegreatinternalforce,whichmayleadcracksorlargedeformationandreducetheserv
3、icelifeoftheconcretestructure,sothetemperatureeffectoflong-spancontinuousrigidframebridgeandcreepshrinkageofconcretehavearousedgreatattentioninthecircleofengineering.TakeNiujiaopingTwo-lineSuperBridgeasanexample,thisessayconductsanalysisoftemperatureeffectandc
4、reepshrinkageeffectonbridgeaccordingtoMidas/Civil(2010).Theselectionofcalculationschemeandvariousparametervaluesreflecttheactualsituationofthebridgeasfaraspossible,inordertogetamoreaccuratesimulativeresults.Mainworkdoneisasfollows:①Analyzedthecharacteristics,c
5、lassificationanddistributionofthetemperatureloadoftheconcrete,andgaveasimpleintroductiontocalculationmethodoftemperatureloadandtemperaturestressofboxgirderofconcrete.②Drewuptemperaturegradientcurvewhichcanreflectthechangeofbridgetemperatureaccordingtothemeasur
6、edtemperaturedataandmadecomparativeanalysisofseveraltemperaturegradientmodesincommonuseathomeandabroad,calculatedthestressanddeformationofthebridge’sstructureandprobedtheinfluenceofvarioustemperaturemodelonthestructure,computedandanalyzedthestressanddeformatio
7、nofbridge’sstructureundertheactionofvarioustemperaturesystemandgradientintheconditionofdifferentsunlightandcoldwave.③InviewoftheprojectofNiujiaopingTwo-lineSuperBridge,findthebettertemperaturegradientcurvewhicharesuitableforthesouthwestregionbywayofcomparingth
8、edifferencebetweenthetemperaturegradientmodescalculatedinaccordancewiththeRulesandRegulationsofChinaRailwayandaccordingtothemeasuredtemperaturedata.④Analyzedthemechanismoftheshrink
