大跨径PC连续刚构桥宽箱空间效应研究

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1、Y1530259分类号坐塑：!!密级单位代码10618学号106260120墨麽交通戈肇硕士学位论文论文题目：大跨径PC连续刚构桥宽箱空间效应研究StudyOilWide--boxSpatialEffectofLong--spanPCContinuousRigid-frameBridge研究生姓名：郝付军导师姓名、职称：钟明全教授级高级工程师申请学位门类专业名称：论文答辩日期工学桥梁与隧道工程2009年4月17日学位授予单位：重庆交通大学答辩委员会主席：周志祥评阅人：刘孝辉2009年4月施尚伟ABSTRACTBecausecontinuo

2、usrigid—framebridgehadmanyadvantages，suchasstressingdefinitely,constructioncostinglessthanotherbridge，applicationrangewide，constructiontechnicalmaturityandmaintenanceworkless，thisbridgestylehadbeenwidelyusedinchinaforrecentthirtyyears．However，nomatterathomeorabroad，invest

3、igationsfoundthatsomelong—spancontinuousrigid-framebridgesappearedcracksaIldexcessivedeflectionontheboxgirdersduringtheusingtime．Obviously,thereasonstoexplainthesediseaseswerecomplicated，lackspatialanalysisofthebridgeWasoneoftheimportantreasons．thispapercarriedoutthefollo

4、wingresearchesdependingontheShuitubridgeinChongqing：①ThespanofShui．tuBridgeWaslarge(mainspan245m)，thecross—sectionoftheboxgiederwaswide(16．75m)，inordertoavoidpossiblediseasesthatappearduringconstructionorusagetime，setupspatialfiniteelementmodelofthebridge，analysizedthespa

5、tialeffectcharacteristicsofthebridgeinconstructionandnormalusagestage．②Accordancewiththewideboxcross—sectionquestionoflong-spancontinuousrigid．framebridge，usedaplanefiniteelementsoftwaretoredesignShui-tubridgebychangingthewidthoftheboxcross-section．Setupaspatialfiniteelem

6、entmodelwhichboxgirderwidthWas20．50mbasedontheShui-tubridge．Bycontrasttheshearlageljf宅ctandbottomslabhorizontalnormalstressofthetwomodel，summarizedthewideboxgirderspacialeffectscharacteristicsoflong—spancontinuousrigid-framebridge，gavethelimitsstandardofthewideboxgirder．③

7、Accordancewiththediseasesonbottomslaboflong—spanandwide‘boxcontinuousrigid．framebridge，summarizedthedestroyingtypeonthebottomwhichinducedbyradialforceandanalyzedthereasonsthatledtotheboaomdestroyed．Derivedformulaforcalculatingtheradialforce．Analyzedtheeffectsoftheprestres

8、sreinforcementpositionerror,localbendingandstraightinsteadofcurveetc．ontheradialforce．Thenthreet