大跨径覆土波纹钢板桥涵受力特点与设计对策研究

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1、万方数据北京交通大学硕士论文万方数据ABSTRACTABSTRACTABSTRACT：Theburiedcorrugatedsteelbridgesandculvertshavewidelyappliedduetoitsgoodmechanicalperformance．Currently,theburiedcorrugatedsteelculvertshavebeendevelopedtothelong-spanstructuresbyforeignresearchers，whiletheresearchanda

2、pplicationonthecorrugatedsteelbridgesandculverts，whichstartedlatelyinourcountry,aremainlyconcentratingontheshort-spanpipeculverts．Therefore，thestudyonthelong—spanburiedcorrugatedsteelculvertsisverynecessary．Firstly,thefieldtestonpipeculvertswitllthediameterof4

3、mand6mWaScarriedout；accordingtOthetestresults，themechanicalperformanceoftheburiedcorrugatedsteelstructure、Ⅳi廿1increasedspanwasanalyzed．Theresultshowsthattheconstructionprocesshasamoreobviousinfluenceonthedeformationandstressofthepipeculvert、析th6mdiameterthanth

4、eonewith4mdiameterSecondly,accordingtotheoutstandingproblemofthestabilityintheconstructionprocess，themostinstabilityconditionofthestructureintheconstructionprocessWaSanalyzed；somefeaSibleimprovementmeasuresweretakenandtheeffectofdifferentmeasuresonthestructura

5、lstabilityintheconstructionprocesswereanalyzedandcompared；differentmeaSuresbaSedontheoverstressingonlocalpanofthelong-spanpipeculvertwereemployedandtheiradvantagesanddisadvantageswerecompared．Finally,thecharacteristicsoftraditionalopenspandrelarchbridgeweresum

6、mariedandbasedthese，thenumberoftheabdominalholesareincreasedonthelong··spanopencross·-sectionalcorrugatedsteelcirculararchbridgeswiththeminimumthicknessofbackfdl；theirmechanicalperformancewasanalyzedandparameterswereoptimized；afterthat，theadvantages，disadvanta

7、gesandapplicationofthenewbridgetypewereproposed．Besides，throughthediscussionandanalysis，somereasonablesuggestionsonthestrengtheningmeaSuresforthelong-·spancorrugatedsteelarchbridgeswithtraditionalopencross·-sectionalhighandlowarcweregiven．KEYWORDS：Corrugatedst

8、eelbridgesandculverts；long-span；stability；open—spandrelarchbridge；structurestrengtheningCLASSNO：TU311：U449万方数据北京交通大学硕士论文万方数据目录中文摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．vABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯