土木工程专业英语 教学课件 作者 陈瑛 8.1 Steel and Composite Structures.ppt

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1、Chapter8-1SteelandCompositeStructuresFRP-SteelCompositeStructuresCharacteristicsLightweightHighstrengthHighdurabilityGoodresistancetocorrosionSurfacetreatmentWire-brushingGrindingSadnblastingSteel-ConcreteCompositeStructuresCharacteristicsAlmostthesamethermalexpansionIdealcombinati

2、onofstrengthswithconcreteefficientincompressionandsteelintensionConcretegivescorrosionprotectionandthermalinsulationConcretecanrestrainslendersteelsectionsfromlocalorlateral-torsionalbucklingMaterialscanbeassumedtobehaveinalinear-elasticmannerAneffectivemoduluscanbeusedRigid-plasti

3、cglobalanalysiscansometimesbeusedMaterialPropertiesCompositeActioninBeamsTwomaterialsareinterconnectedbymeansofmechanicalshearconnectorsHeadedstudsareusedfortheconnectionHeardedstudsaresemi-automaticallyweldedtoflangeCompositeColumnsConcreteencasedsteelcolumnsConcretefilledsteeltub

4、esRolledsectioncolumnspartlyencasedinconcreteBeam–ColumnConnectionsSimplecompositejointsRigidcompositejointsSemi-rigidcompositejointsBeamisconnectedtocolumnbymeansofdoublewebanglesorflangecleatswithorwithoutwebanglesLongitudinalshearLongitudinalslipDeflectionsVerticalshearBucklingo

5、fflangesandwebsofbeamsCrack-widthcontrolStructuralfiredesignDesignConsiderationsBriefreviewforsteelandcompositestructuresFRP-SteelCompositeStructuresCharacteristicsSurfacetreatmentSteel-ConcreteCompositeStructuresCharacteristicsMaterialpropertiesCompositeactionsinbeamsCompositecolu

6、mnsBeam-columnconnectionsDesignConsiderationsforSteel-ConcreteStructuresLongitudinalshearLongitudinalslipDeflectionsVerticalshearBucklingofflangesandwebsofbeamsCrack-widthcontrolStructuralfiredesignReviewFlexuralLaterallysupportedbeamLaterallyunsupportedbeamShearinBeamWebbucklingin

7、diagonaldirectionOccursmainlyinregionsadjacenttosupportsorthevicinityofpointloadsWebbucklingcanbeavoidedifstiffenersareplacedcorrectlyStiffenerDesignIntermediatetransversewebstiffenerLoadcarryingstiffenerBearingstiffenerTorsionstiffenerDiagonalstiffenerTensionstiffener