跨地裂缝钢筋混凝土桥梁破坏机理的物理模型试验

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1、分类号：P64210710-20050369装步太海lrlllllllrllqlllHl{lrlllFIIIIIFIHlllllfY1526960硕士学位论文跨地裂缝钢筋混凝土桥梁破坏机理的物理模型试验导师姓名职称申请学位级别论文提交日期学位授予单位刘洪佳门玉明教授答辩委员会主席学位论文评阅人杨鲁飞杨鲁飞王勇智AbstractTherapiddevelopmentofthetransportationistoguaranteethattherealizationofthefourmodernizationsaccele

2、ratequickly．Intheconstructionssuchashighways，railways，urbanandruralroadandwaterconservancy,inordertostrideacrossalloftheobstaclesorestablishthree—dimensionaltraffic，eachtypeofthebridgewhichwillbecometheimportantcomponentoftheoverlandcommunicationshouldbebuiltinC

3、hineseroadtrafficconstruction，theconcretebridge(prestressedconcretebridgeandreinforcedconcretebridge)isthemostimportantformofthebridge．WiththefastdevelopmentofXi’an,Xi’antransportationalsodevelopsquickly．Butfromthelate1970s，duetonatureandman-madefactors，therewer

4、ealtogetherl4groundfissurebeltswhicharegrowingnowinXi’an．Groundfissurebeltshadaremarkableimpactonsomebridges．Soithasfar-reachingsignificancetoinquirytheinfluencemechanismofthegroundfissuresonthestructureofthebridgeandthedamagepatternsofthebridgespanninggroundfis

5、surebelt．StudiesofinfluencemechanismofgroundfissureactivitytothereinforcedconcretebridgeintheXi’antypicalstratumburieddepth12．5madoptedtestingcellssuchasasettlementCup，high-precisionLevel，steelwirepressureonthebox，displacementmeterandstraingaugesandsimulatedgrou

6、ndfissureactivitiesbysettlementplatformthroughthelarge—scale(1：5)structuralmodelexperimentofreinforcedconcretebridgespanninggroundfissure．Itcomestoaconclusionthatthestressstraincharacteristicsoftheconcretesbridgeundertheinfluenceofgroundfissurebeltsandtheconcret

7、esbridge’Sstresspattern,whichprovidesthescientificbasisfortheStructuralmeasuresoftheconcretesbridgespanninggroundfissuresection．NumericalmodelofgroundfissureandtheConcretesBridgeisbuiltbytheANSYSfiniteelementsoft．ware，thestressandstrainofconcretesbridgestructure

8、underthefissureinfluenceareanalyzedthroughthenumericalcalculation．Withthecomparisonofthemodelexperiment’Sresult，itprovidestheexperimentalbasisforbridgedesignpassingth