学科分类
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1 个结果
  • 简介:Inpastterroristattacks,vehicleborneimprovisedexplosivedevices(VBIED)havebeentheprimarymannerofattackingbuildingsandinfrastructures.Preventingunauthorizedvehiclesfromapproachingaprotectedareawithanti-ramsystemswouldmaintainanestablishedstandoffdistanceagainstmovingandstationaryvehiclesandconsequentlyreduceblastanddebristhreats.Thisstrategyhasbeenconsideredthefirstlineofdefenceagainstterrorists.Severaltypesofanti-ramdeviceshavebeendevelopedinaccordancewithU.S.DepartmentofStateK-ratingcriteria,forexample,wedgebarriers,risingbeams,sliding/swinggates,anddroparms.However,thesedevicestypicallyneedadeepfoundationforinstallationandcan'tbeimplementedintomanylocationswhereadepthofexcavationislimitedinordertoprotectutilitylinesofbuildingsandinfrastructures.Thispaperpresentsarecentdevelopmentofaseriesofshallowfootinganti-rambollardsystems(SFABS)thatcansatisfyK-12ratingwithonlyfive-inchthickfooting.Ahigh-fidelityphysicsbasedfiniteelementtechniquewithavehiclecrashmodelisusedforpredictinganti-ramcapacityanddeterminingdesignparametersoftheSFABS.Full-scalevehiclecrashtestsofthedevelopedSFABSsystemshavebeencarriedouttovalidatethedesignandanalysis.

  • 标签: 抗撞击力 带缆桩 薄桩靴 碰撞试验 有限元分析 建筑物