结构隔震与耗能减振.ppt

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1、第九章摩擦阻尼器§1基本构造1§2自复位摩擦阻尼器ConfigurationFrictionWedge2CylinderWallSpringSteelCompressionWedgesInternalStopBronzeFrictionWedges3HysteresisLoopOA4OAB5OABC6OABDEC7OABDEFGC8OABFDEGHC9OABCDFGHEI10OABCDEFGHIJK11OABJCDEFGHIKL12TestResults13§3梁柱摩擦节点1.摩擦节点142.预应力摩擦节点构造15滞回特性1

2、6工程应用：位于旧金山的一座39层钢筋混泥土结构17基本组成§4自复位（摩擦）阻尼器18工作原理19构造20试验结果支撑预应力筋摩擦单元21§5Pall摩擦阻尼器1.IntroductionTypicalLocationandGeneralArrangement22ApplicationTodate,morethanfortybuildingswithPalldampershavealreadybeenbuilt(Chandra2000)CanadianSpaceAgency(Palletal.,1993)23TheFree

3、portWaterReservoir,Sacramento,California(HaleandPall,2000)24CityHall,Shenyang,China(WuBo,LiHui,etal.,1998)25ComputationMethod26ExistingProblemsAnalysis:Theavailablesimplifiedmethodisnotconvincing.Experiment:Nodataofbraceforceisavailable.272.两种Pall阻尼器构造(a)frontview(

4、b)crisscrossplate(c)sideview1.crisscrossplate2.curveslot3.frictionpad4.cornerbolt5.slipbolt6.horizontallink7.verticallinkConstructionofPFD(PallFrictionDamper)28OperationofPFD(a)frontview(b)sideview29ConstructionofTFD(TShapeCorePlateFrictionDamper)(a)frontview(b)Tsh

5、apeplate(c)sideview1.Tplate2.curveslot3.frictionpad4.cornerbolt5.slipbolt6.horizontallink7.verticallink30OperationofPFD(a)frontview(b)sideview313.ComputationmethodofPFDComputationSchematic32EquilibriumEquationsMomentEquilibrium33ForceEquilibrium(TFD)34ForceEquilibr

6、ium(PFD)Difficulty35Solution:PrincipleofVirtualWork—ThetotalworkdonebyF1andF2is—TotalenergydissipationbyF0is—LetW=E,thenwehave364.AnalysisResultsDamperForce37BraceForce385.ExperimentalVerificationTestSetup39TestResults40思考题摩擦阻尼器与防屈曲支撑相比而言的优点与缺点何在？41主要参考文献WayD.,“

7、Friction-DampedMoment-ResistingFrames”,EarthquakeSpectra,1996,12(3):623-633WuB,ZhangJ,WilliamsM,OuJ,“HystereticBehaviorofPall-typedImprovedFrictionalDampers”,EngineeringStructures,2005,27:1258-1267Wu,B.andOu,J.P.,“ThePseudo-ViscousFrictionalEnergyDissipator:aNewDev

8、iceforMitigatingSeismicEffects”,EarthquakeEngineeringandStructuralDynamics,2003,32(1),31-48PedroRojasC,MarthaCaballero,JamesM.Ricles,andRichardSa