城市桥梁被车辆撞击后检测评估体系-研究

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1、ABSTRACTInrecentyears，alargenumberofover-crossstructureshavebecomethemainwayofrelievingthetrafficpressure，such嬲buildingoverpaSs．However，itisofcommonoccurrencethatcollisionoccurredbetweensuperelevationvehiclesandoverpaSsbridgesbecauseofbridgeclearancelimitationordrivinginthewrongway．Theanalysissh

2、owsthatthecollisionbetweenbridgesandvehicleshaStwotypes：oneishittingupperstructuresofbridgeduetothesuperelevationvehicles；Anotherkindishittingsubstructure，suchaspiers．Twokindsofaccidentcouldhavecauseddeadlydestructionofbridge．Becauseofthetwotypesofcollisiondestructionareverybig，localdamagerepair

3、mentisdifficult,andthecostsareveryhi曲，especiallyforserioustrafficjam．Howtoanalyzetheimpactonbridge，andhowtoevaluatethedamageofbridge，andthesafetyormaintenanceisofgreatrealisticsignificance．Duetoheavycarofrealbridgeisnotonlyextremelydifficult，butrathercostly(basicallyisCardestroyedandbridgeinjury

4、)，SObycomputersimulationtechnology，thecraShsimulationanalysisofcollisionbetweenbridgesandvehicleshasverydistinctadvantage．Thispaperjustbasedonthetwokindsofcollisionaccident，inasmallamount011thebasisofthemodelteststudynonlinear-finiteelementsoftware，usinguniversalABAQUS．Themodelusedstandardoverlo

5、adedvehiclesandprestressedconcreteslab—bridge．Andwithdifferentconditionsofthevehicleshittingbridgesrespectively．Specificcontentsasfollows：(芏)Rcsearchindifferentspeedcollisionsforbridge，besidesinfluenceofthewhole，stress，displacementanddamageofgirderandpier；(至)Researchindifferentanglecollisionsfor

6、bridge，besidesinfluenceofthewhole，stress，displacementanddamageofgirderandpier；③Researchindifferentqualitycollisionsforbridge，besidesinfluenceofthewhole，stress，displacementanddamageofgirderandpier．Finally，诵tllthedamagedetectionmethodincommon，accordingtothestudy，thispaperdiscussestheimpactanddamag

7、emechanismaftercollisionhowtoeffectivelyevaluatethedamagedegreeandestablishcorrespondingevaluationsystem．KEYWORDS：overpassbridge；collision；stress；displacement；damageassessment第一章绪论．．⋯⋯．⋯⋯⋯．．⋯⋯．．．．⋯．⋯．．．．．．．．．11．1车桥碰撞事故调研分析⋯⋯