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首页 变形引起的疲劳、腐蚀、腐蚀疲劳 -John W. Fisher

变形引起的疲劳、腐蚀、腐蚀疲劳 -John W. Fisher.pdf

变形引起的疲劳、腐蚀、腐蚀疲劳 -John W. Fisher

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2010-11-11 0人阅读 举报 0 0 暂无简介

简介:本文档为《变形引起的疲劳、腐蚀、腐蚀疲劳 -John W. Fisherpdf》,可适用于经济金融领域

SessionDistorsionInducedfatigueCorrosionInducedFatigueAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityFatigueandFractureFatigueandFractureFatigueandFractureFatigueandFractureDesignofSteelBridgesDesignofSteelBridgesDesignofSteelBridgesDesignofSteelBridgesDistortionInducedFatigue变形引起的疲劳变形引起的疲劳变形引起的疲劳变形引起的疲劳CorrosioncorrosionFatigue腐蚀引起的疲劳腐蚀引起的疲劳腐蚀引起的疲劳腐蚀引起的疲劳AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityLoadvsDisplacementLoadvsDisplacementLoadvsDisplacementLoadvsDisplacementLoadvsDisplacementLoadvsDisplacementLoadvsDisplacementLoadvsDisplacement荷载和变位荷载和变位荷载和变位荷载和变位荷载和变位荷载和变位荷载和变位荷载和变位�Loadinducedfatigue荷载引起的疲劳荷载引起的疲劳荷载引起的疲劳荷载引起的疲劳–Detailprimarilysubjectedtoinplanestresses主要受面内应力主要受面内应力主要受面内应力主要受面内应力outofplanebendingcomponentduetoelementdeformationnegligible面外弯曲可忽略面外弯曲可忽略面外弯曲可忽略面外弯曲可忽略�Distortion(displacement)inducedfatigue变形引起的疲劳变形引起的疲劳变形引起的疲劳变形引起的疲劳–Secondarystressesgeneratedduetodeformationofelementeitherfromsecondaryoutofplanedeformationandorsecondorderloaddeformationinteraction二次应力二次应力二次应力二次应力•Secondarydeformationarisesduetoincompatibilityindisplacementbetweenconnectingelements•InplanestressesinteractwithoutofplanedeformationtocausesecondorderstressesAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityExamplesofSecondaryStressesExamplesofSecondaryStressesExamplesofSecondaryStressesExamplesofSecondaryStressesExamplesofSecondaryStressesExamplesofSecondaryStressesExamplesofSecondaryStressesExamplesofSecondaryStresses二次应力举例二次应力举例二次应力举例二次应力举例二次应力举例二次应力举例二次应力举例二次应力举例�“Oilcanning”or“pumping”offlexibleplatesinbending受弯柔性板的“颤动”受弯柔性板的“颤动”受弯柔性板的“颤动”受弯柔性板的“颤动”–Occurswithoutanylateralforcesapplied•Primarilyduetogeometricimperfection(outofflatness)–Sometimesvisible�Outofplanedistortionduetolateralforcesordisplacements横向力下的面外变形横向力下的面外变形横向力下的面外变形横向力下的面外变形–Webgapcrackingatlocaldetails•Floorbeamsanddiaphragms–Deckplatecracking•Orthotropicbridgedecks–Tiegirderfloorbeamconnectionsinarches•Alsoatfloorbeamconnectionsintrussesandplategirderbridges–CantileverbrackettieplatesAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversitySmallWebGapCrackingSmallWebGapCrackingSmallWebGapCrackingSmallWebGapCrackingSmallWebGapCrackingSmallWebGapCrackingSmallWebGapCrackingSmallWebGapCracking小间隙腹板裂纹小间隙腹板裂纹小间隙腹板裂纹小间隙腹板裂纹小间隙腹板裂纹小间隙腹板裂纹小间隙腹板裂纹小间隙腹板裂纹�Floorbeamconnectionplatenotconnectedtoflanges(concernsaboutweldingtotensionflange)–SmalldeformablewebgapatconnectionplatecopeAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityWebWebWebWebWebWebWebWebgapCrackinggapCrackinggapCrackinggapCrackinggapCrackinggapCrackinggapCrackinggapCracking––––––––CrossFrameConnectionCrossFrameConnectionCrossFrameConnectionCrossFrameConnectionCrossFrameConnectionCrossFrameConnectionCrossFrameConnectionCrossFrameConnection横撑结点处横撑结点处横撑结点处横撑结点处横撑结点处横撑结点处横撑结点处横撑结点处AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityWebWebWebWebWebWebWebWebgapCrackinggapCrackinggapCrackinggapCrackinggapCrackinggapCrackinggapCrackinggapCracking––––––––LongStiffenerEndLongStiffenerEndLongStiffenerEndLongStiffenerEndLongStiffenerEndLongStiffenerEndLongStiffenerEndLongStiffenerEnd纵向加劲肋端部纵向加劲肋端部纵向加劲肋端部纵向加劲肋端部纵向加劲肋端部纵向加劲肋端部纵向加劲肋端部纵向加劲肋端部SessionDistorsionInducedfatigueCorrosionInducedFatigueAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingTopFlangeTopFlangeTopFlangeTopFlangeTopFlangeTopFlangeTopFlangeTopFlange上翼缘上翼缘上翼缘上翼缘上翼缘上翼缘上翼缘上翼缘WebWebWebWebFlangeFlangeFlangeFlangeTransTransTransTransConnConnConnConnPlatePlatePlatePlateAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCracking––––––––TopFlangeTopFlangeTopFlangeTopFlangeTopFlangeTopFlangeTopFlangeTopFlange上翼缘上翼缘上翼缘上翼缘上翼缘上翼缘上翼缘上翼缘�StressReversal反向应力反向应力反向应力反向应力AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingWebGapCrackingBottomFlangeBottomFlangeBottomFlangeBottomFlangeBottomFlangeBottomFlangeBottomFlangeBottomFlange下翼缘下翼缘下翼缘下翼缘下翼缘下翼缘下翼缘下翼缘AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCrackDevelopmentonBothSidesCrackDevelopmentonBothSidesCrackDevelopmentonBothSidesCrackDevelopmentonBothSidesCrackDevelopmentonBothSidesCrackDevelopmentonBothSidesCrackDevelopmentonBothSidesCrackDevelopmentonBothSides裂纹在两侧发展裂纹在两侧发展裂纹在两侧发展裂纹在两侧发展裂纹在两侧发展裂纹在两侧发展裂纹在两侧发展裂纹在两侧发展AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCracking系梁和桁架横梁处的裂纹系梁和桁架横梁处的裂纹系梁和桁架横梁处的裂纹系梁和桁架横梁处的裂纹系梁和桁架横梁处的裂纹系梁和桁架横梁处的裂纹系梁和桁架横梁处的裂纹系梁和桁架横梁处的裂纹WebWebWebWebTopTopTopTopflangeflangeflangeflangeConnectionConnectionConnectionConnectionangleangleangleangle�ResultofRelativeMovementbetweenStructureandFloorbeamsAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingTieGirderTrussFloorbeamCrackingSessionDistorsionInducedfatigueCorrosionInducedFatigueAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCracking悬臂支撑结点裂纹悬臂支撑结点裂纹悬臂支撑结点裂纹悬臂支撑结点裂纹悬臂支撑结点裂纹悬臂支撑结点裂纹悬臂支撑结点裂纹悬臂支撑结点裂纹AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingCantileverBracketConnectionCrackingAtSmallGaps小间隙处小间隙处小间隙处小间隙处AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityMitigationMeasuresMitigationMeasuresMitigationMeasuresMitigationMeasuresMitigationMeasuresMitigationMeasuresMitigationMeasuresMitigationMeasures缓解措施缓解措施缓解措施缓解措施缓解措施缓解措施缓解措施缓解措施�Displacementinducedfatiguecracking�Accountforsecondarystresses考虑二次应力考虑二次应力考虑二次应力考虑二次应力–Conductadvancedanalysisandormeasurements�Essentiallytwomitigationapproach两种基本方法两种基本方法两种基本方法两种基本方法–Stiffening刚化刚化刚化刚化–Softening软化软化软化软化–Holedrillingnoteffective!!!钻孔并不有效!!!钻孔并不有效!!!钻孔并不有效!!!钻孔并不有效!!!LEIM∆=AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityHoleDrillingatFloorbeamsHoleDrillingatFloorbeamsHoleDrillingatFloorbeamsHoleDrillingatFloorbeamsHoleDrillingatFloorbeamsHoleDrillingatFloorbeamsHoleDrillingatFloorbeamsHoleDrillingatFloorbeams横梁上钻孔横梁上钻孔横梁上钻孔横梁上钻孔横梁上钻孔横梁上钻孔横梁上钻孔横梁上钻孔GirderGirderGirderGirderWebWebWebWebFloorbeamFloorbeamFloorbeamFloorbeamConnectionPLConnectionPLConnectionPLConnectionPLNotalwayseffectivehoweverdrillholestoremovecracktipAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityTemporaryRetrofitsTemporaryRetrofitsTemporaryRetrofitsTemporaryRetrofitsTemporaryRetrofitsTemporaryRetrofitsTemporaryRetrofitsTemporaryRetrofits临时性修复临时性修复临时性修复临时性修复临时性修复临时性修复临时性修复临时性修复SessionDistorsionInducedfatigueCorrosionInducedFatigueAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityHoleDrillingandStiffeningHoleDrillingandStiffeningHoleDrillingandStiffeningHoleDrillingandStiffeningHoleDrillingandStiffeningHoleDrillingandStiffeningHoleDrillingandStiffeningHoleDrillingandStiffening钻孔和加固钻孔和加固钻孔和加固钻孔和加固钻孔和加固钻孔和加固钻孔和加固钻孔和加固HereholedrillingwasnoteffectiveStiffenedconnection钻孔无效须加固钻孔无效须加固钻孔无效须加固钻孔无效须加固AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityWebGapCrackingatLongStiffenersWebGapCrackingatLongStiffenersWebGapCrackingatLongStiffenersWebGapCrackingatLongStiffenersWebGapCrackingatLongStiffenersWebGapCrackingatLongStiffenersWebGapCrackingatLongStiffenersWebGapCrackingatLongStiffeners纵向加劲肋间隙裂纹纵向加劲肋间隙裂纹纵向加劲肋间隙裂纹纵向加劲肋间隙裂纹纵向加劲肋间隙裂纹纵向加劲肋间隙裂纹纵向加劲肋间隙裂纹纵向加劲肋间隙裂纹�Retrofitwithcrackstopper(twoholesconnectedwithaslit:dogboneshape)�棒骨形钻孔棒骨形钻孔棒骨形钻孔棒骨形钻孔AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityBottomFlangeStiffeningBottomFlangeStiffeningBottomFlangeStiffeningBottomFlangeStiffeningBottomFlangeStiffeningBottomFlangeStiffeningBottomFlangeStiffeningBottomFlangeStiffening下翼缘加固下翼缘加固下翼缘加固下翼缘加固下翼缘加固下翼缘加固下翼缘加固下翼缘加固Rigidityoftheretrofitiscriticaltosuccess刚性是关键刚性是关键刚性是关键刚性是关键AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityRetrofitbyStiffenedFloorSystemRetrofitbyStiffenedFloorSystemRetrofitbyStiffenedFloorSystemRetrofitbyStiffenedFloorSystemRetrofitbyStiffenedFloorSystemRetrofitbyStiffenedFloorSystemRetrofitbyStiffenedFloorSystemRetrofitbyStiffenedFloorSystem加固横梁加固横梁加固横梁加固横梁加固横梁加固横梁加固横梁加固横梁AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversitySofteningwithLargeWebGapsSofteningwithLargeWebGapsSofteningwithLargeWebGapsSofteningwithLargeWebGapsSofteningwithLargeWebGapsSofteningwithLargeWebGapsSofteningwithLargeWebGapsSofteningwithLargeWebGaps加大腹板间隙进行软化加大腹板间隙进行软化加大腹板间隙进行软化加大腹板间隙进行软化加大腹板间隙进行软化加大腹板间隙进行软化加大腹板间隙进行软化加大腹板间隙进行软化Permitsoutofplanedisplacementtooccuroverlongerlengthorwebgap(L)Mustbesufficientlyflexibletobesuccessful需足够柔软需足够柔软需足够柔软需足够柔软AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityConnectionSofteningConnectionSofteningConnectionSofteningConnectionSofteningConnectionSofteningConnectionSofteningConnectionSofteningConnectionSoftening––––––––ExampleExampleExampleExampleExampleExampleExampleExample结点软化实例结点软化实例结点软化实例结点软化实例结点软化实例结点软化实例结点软化实例结点软化实例QualitycontroliscriticalQualitycontroliscriticalQualitycontroliscriticalQualitycontroliscriticalwhereconnectionplateiswhereconnectionplateiswhereconnectionplateiswhereconnectionplateisremovedremovedremovedremovedSessionDistorsionInducedfatigueCorrosionInducedFatigueAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityConnectionSofteningConnectionSofteningConnectionSofteningConnectionSofteningConnectionSofteningConnectionSofteningConnectionSofteningConnectionSoftening结点软化结点软化结点软化结点软化结点软化结点软化结点软化结点软化CantileverBracketConnectionsofteningbyfastenerremoval除去螺栓除去螺栓除去螺栓除去螺栓AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCorrosionConsiderationsCorrosionConsiderationsCorrosionConsiderationsCorrosionConsiderationsCorrosionConsiderationsCorrosionConsiderationsCorrosionConsiderationsCorrosionConsiderations腐蚀应考虑的因素腐蚀应考虑的因素腐蚀应考虑的因素腐蚀应考虑的因素腐蚀应考虑的因素腐蚀应考虑的因素腐蚀应考虑的因素腐蚀应考虑的因素�Atmosphericcorrosionresistance环境�Sectionlossfromactivecorrosioncellactivityfromdirt,debris(withsulfatesandchlorides)andmoisture尘土废墟和潮气引起�Changedstructuralfunction改变结构功能AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityOpenBridgeJointsOpenBridgeJointsOpenBridgeJointsOpenBridgeJointsOpenBridgeJointsOpenBridgeJointsOpenBridgeJointsOpenBridgeJoints伸缩缝被打开伸缩缝被打开伸缩缝被打开伸缩缝被打开伸缩缝被打开伸缩缝被打开伸缩缝被打开伸缩缝被打开AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCorrosionNotchCorrosionNotchCorrosionNotchCorrosionNotchCorrosionNotchCorrosionNotchCorrosionNotchCorrosionNotch锈蚀缺口锈蚀缺口锈蚀缺口锈蚀缺口锈蚀缺口锈蚀缺口锈蚀缺口锈蚀缺口AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityOpenExpansionJointOpenExpansionJointOpenExpansionJointOpenExpansionJointOpenExpansionJointOpenExpansionJointOpenExpansionJointOpenExpansionJoint––––––––MianusMianusMianusMianusMianusMianusMianusMianus伸缩缝伸缩缝伸缩缝伸缩缝伸缩缝伸缩缝伸缩缝伸缩缝断开断开断开断开断开断开断开断开迈亚纳斯桥迈亚纳斯桥迈亚纳斯桥迈亚纳斯桥迈亚纳斯桥迈亚纳斯桥迈亚纳斯桥迈亚纳斯桥AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityFatiguecrackinpinatoutsidehangerFatiguecrackinpinatoutsidehangerFatiguecrackinpinatoutsidehangerFatiguecrackinpinatoutsidehangerFatiguecrackinpinatoutsidehangerFatiguecrackinpinatoutsidehangerFatiguecrackinpinatoutsidehangerFatiguecrackinpinatoutsidehanger外侧吊杆处栓销裂纹外侧吊杆处栓销裂纹外侧吊杆处栓销裂纹外侧吊杆处栓销裂纹外侧吊杆处栓销裂纹外侧吊杆处栓销裂纹外侧吊杆处栓销裂纹外侧吊杆处栓销裂纹SessionDistorsionInducedfatigueCorrosionInducedFatigueAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityFracturedsegmentthatsupportedFracturedsegmentthatsupportedFracturedsegmentthatsupportedFracturedsegmentthatsupportedFracturedsegmentthatsupportedFracturedsegmentthatsupportedFracturedsegmentthatsupportedFracturedsegmentthatsupportedoutsidehangeroutsidehangeroutsidehangeroutsidehangeroutsidehangeroutsidehangeroutsidehangeroutsidehanger支承外吊杆的栓销的断裂部分支承外吊杆的栓销的断裂部分支承外吊杆的栓销的断裂部分支承外吊杆的栓销的断裂部分支承外吊杆的栓销的断裂部分支承外吊杆的栓销的断裂部分支承外吊杆的栓销的断裂部分支承外吊杆的栓销的断裂部分AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCorrosionPackoutCorrosionPackoutCorrosionPackoutCorrosionPackoutCorrosionPackoutCorrosionPackoutCorrosionPackoutCorrosionPackout锈蚀堆集膨胀锈蚀堆集膨胀锈蚀堆集膨胀锈蚀堆集膨胀锈蚀堆集膨胀锈蚀堆集膨胀锈蚀堆集膨胀锈蚀堆集膨胀AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversitySchematicofconditionatfailureSchematicofconditionatfailureSchematicofconditionatfailureSchematicofconditionatfailureSchematicofconditionatfailureSchematicofconditionatfailureSchematicofconditionatfailureSchematicofconditionatfailure落桥时的状况落桥时的状况落桥时的状况落桥时的状况落桥时的状况落桥时的状况落桥时的状况落桥时的状况AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityWeldCrackingfromCorrosionPackoutWeldCrackingfromCorrosionPackoutWeldCrackingfromCorrosionPackoutWeldCrackingfromCorrosionPackoutWeldCrackingfromCorrosionPackoutWeldCrackingfromCorrosionPackoutWeldCrackingfromCorrosionPackoutWeldCrackingfromCorrosionPackout由锈蚀堆集膨胀产生的焊接裂纹由锈蚀堆集膨胀产生的焊接裂纹由锈蚀堆集膨胀产生的焊接裂纹由锈蚀堆集膨胀产生的焊接裂纹由锈蚀堆集膨胀产生的焊接裂纹由锈蚀堆集膨胀产生的焊接裂纹由锈蚀堆集膨胀产生的焊接裂纹由锈蚀堆集膨胀产生的焊接裂纹AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityWeldCrackingatChordSpliceWeldCrackingatChordSpliceWeldCrackingatChordSpliceWeldCrackingatChordSpliceWeldCrackingatChordSpliceWeldCrackingatChordSpliceWeldCrackingatChordSpliceWeldCrackingatChordSplice弦杆拼接板处的焊接裂纹弦杆拼接板处的焊接裂纹弦杆拼接板处的焊接裂纹弦杆拼接板处的焊接裂纹弦杆拼接板处的焊接裂纹弦杆拼接板处的焊接裂纹弦杆拼接板处的焊接裂纹弦杆拼接板处的焊接裂纹AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCrackinWeldCrackinWeldCrackinWeldCrackinWeldCrackinWeldCrackinWeldCrackinWeldCrackinWeld焊接裂纹焊接裂纹焊接裂纹焊接裂纹焊接裂纹焊接裂纹焊接裂纹焊接裂纹SessionDistorsionInducedfatigueCorrosionInducedFatigueAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCorrosionpackoutcreatedhighstressCorrosionpackoutcreatedhighstressCorrosionpackoutcreatedhighstressCorrosionpackoutcreatedhighstressCorrosionpackoutcreatedhighstressCorrosionpackoutcreatedhighstressCorrosionpackoutcreatedhighstressCorrosionpackoutcreatedhighstressatweldrootatweldrootatweldrootatweldrootatweldrootatweldrootatweldrootatweldroot锈蚀膨胀在焊根产生高应力锈蚀膨胀在焊根产生高应力锈蚀膨胀在焊根产生高应力锈蚀膨胀在焊根产生高应力锈蚀膨胀在焊根产生高应力锈蚀膨胀在焊根产生高应力锈蚀膨胀在焊根产生高应力锈蚀膨胀在焊根产生高应力AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityCorrosionPackCorrosionPackCorrosionPackCorrosionPackCorrosionPackCorrosionPackCorrosionPackCorrosionPackoutoutoutoutoutoutoutout锈蚀堆集锈蚀堆集锈蚀堆集锈蚀堆集锈蚀堆集锈蚀堆集锈蚀堆集锈蚀堆集AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityHPSToughnessCorrosionHPSToughnessCorrosionHPSToughnessCorrosionHPSToughnessCorrosionHPSToughnessCorrosionHPSToughnessCorrosionHPSToughnessCorrosionHPSToughnessCorrosionResistanceResistanceResistanceResistanceResistanceResistanceResistanceResistance高性能钢的韧性和耐腐蚀性高性能钢的韧性和耐腐蚀性高性能钢的韧性和耐腐蚀性高性能钢的韧性和耐腐蚀性高性能钢的韧性和耐腐蚀性高性能钢的韧性和耐腐蚀性高性能钢的韧性和耐腐蚀性高性能钢的韧性和耐腐蚀性�ActualtoughnessfarexceedstheAASHTOrequirementsforfracturecriticalmembers远高于远高于远高于远高于AASHTO对断裂敏感构件的韧性要求对断裂敏感构件的韧性要求对断裂敏感构件的韧性要求对断裂敏感构件的韧性要求�Fracturemodechangesfrombrittlefracturetoyieldonnetsection断裂模式由脆性断裂转向净截面屈服断裂模式由脆性断裂转向净截面屈服断裂模式由脆性断裂转向净截面屈服断裂模式由脆性断裂转向净截面屈服�Enhancedcracktoleranceincreasesthepotentialtodetectcracksbeforefailure裂纹容忍度提高从而提高了裂纹容忍度提高从而提高了裂纹容忍度提高从而提高了裂纹容忍度提高从而提高了破坏前被查到的可能破坏前被查到的可能破坏前被查到的可能破坏前被查到的可能�Fatigueresistancedoesnotchange疲劳强度不变疲劳强度不变疲劳强度不变疲劳强度不变�Weatheringsteelindexisbetterthanconventionalweatheringsteel耐候钢指数高于普通耐候钢耐候钢指数高于普通耐候钢耐候钢指数高于普通耐候钢耐候钢指数高于普通耐候钢AdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityThicknessLossAfterYearsThicknessLossAfterYearsThicknessLossAfterYearsThicknessLossAfterYearsThicknessLossAfterYearsThicknessLossAfterYearsThicknessLossAfterYearsThicknessLossAfterYears年后的厚度损失年后的厚度损失年后的厚度损失年后的厚度损失年后的厚度损失年后的厚度损失年后的厚度损失年后的厚度损失KureBeachmLocation(ISG)KureBeachmLocation(ISG)KureBeachmLocation(ISG)KureBeachmLocation(ISG)KureBeachmLocation(ISG)KureBeachmLocation(ISG)KureBeachmLocation(ISG)KureBeachmLocation(ISG)AAHPSWWKobeNKKNSCACorrosionLoss,milsGTownsendIndexAdvancedTechnologyforLargeStructuralSystemsCenterLehighUniversityComparisonofImprovedWeatheringSteelsComparisonofImprovedWeatheringSteelsComparisonofImprovedWeatheringSteelsComparisonofImprovedWeatheringSteelsComparisonofImp

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