建筑结构用高强度钢材力学性能研究进展

43220131BuildingStructureVol．43No．2Jan．2013*100084、。、、、、。。。。TU391A1002-848X201302-0088-07ResearchadvancesonmechanicalpropertiesofhighstrengthstructuralsteelsBanHuiyongShiGangShiYongjiuWangYuanqingKeyLaboratoryofCivilEngineeringSafetyandDurabilityofChinaEducationMinistryDepartmentofCivilEngineeringTsinghuaUniversityBeijing100084ChinaAbstractWiththeimprovementofthesteelproductionprocesshighstrengthandhighperformancesteelshavebeendeveloped．Howeverthedevelopmentandengineeringapplicationofhighstrengthsteelstructureswereconstrainedasaresultofthestrictlimitrequirementonstructuralsteelmaterialpropertiesaccordingtomostofthedesigncodesespeciallyfortheyield-tensilestrengthratioY/Tratio．TheproductionprocessandsteelgradeofhighstrengthstructuralsteelswereintroducedcomprehensivelyandthelimitrequirementsindifferentsteelstructuredesigncodeswerereviewedincludingthoseofEuropeNorthAmericaAustraliaJapanandChinaandthecomparisonforsomeimportantmechanicalpropertyindexessuchasY/Tratioandelongationafterfracturewasconducted．Besidesalargeamountoftensioncoupontestdataandresearchadvancesforhighstrengthsteelswerearrangedthematerialpropertyfeatureswereresearchedandthestress-strainrelationshipmodelusedforthenumericalstudywasproposed．ResultsshowthathighstrengthstructuralsteelshavewonderfultoughnessbutalsolargerY/Tratioandlowerelongationcomparedwiththoseofordinarystrengthsteelswhichmayexceedmostofthecodelimitsandthisgreatlyconstrainstheapplicationofsuchsteelstructures．Thereforetherelationshipbetweenthesteelmechanicalpropertyandstructuresafetyneedstobediscussedandresearchedquantitativelyaswellaswhethertherequirementinthedesigncodescanberelaxed．Itishelpfultocomprehendthehighstrengthsteelmaterialpropertyandrelevantcoderequirementsandtopromotethehighstrengthsteelstructureresearches．Itisusefulfortheengineeringapplicationandcoderevision．Keywordshighstrengthsteelmechanicalpropertycodelimitvalueresearchadvance*51078205。[e-mail]。0、。、TMCP、1-4460MPa。fy≥420MPa、fy≥690MPa。、432．4。-5。。。、。、。11、、。、、TMCP6。1.1、、31。-。2060、。、、。2070。、。、、。。、Pcm。1.2《》GB/T1591—2008、、、、7《》GB/T19879—2005、、、+、+-8。61SPNHO2NbVTi。2、、、。2.111EN10025-69S460S500S550S620S690S890S960QQLQL1ASTM10-13A992/992MA913/913MA709/709MA514/514M—BS436019901450CEEF115BHS500BHS700HT590HT780SA440—GB/T1591-20087Q420Q460Q500Q550Q620Q690ABCDEGB/T19879-20058Q420GJQ460GJCDEA709/709MHPS70WHPS100W982013485MPa690MPa50450MPa。《》GB/T1591—20087ABQ420。2Y/Tfy/MPaA/%L0/mmEN1993-1-1200518≤0.91—≥155.65A槡0εu≥15εy—EN1993-1-12200719≤0.95460～700≥105.65A槡0εu≥15εyS460～S700ASTMA992/A992M-06a10≤0.85345～450≥18≥2120050—A992/A992MASTMA913/A913M-0411≤0.85345～450≥18≥2120050—A913/A913M50ANSI/AISC360-0520—≤450———ANSI/AISC341-0521—≤345≤380≥2050—CAN/CSA-S16-0116≤0.85≤350≤480———AS4100-199822≤0.83≤450≥155.65A槡0εst≥6εyGB/T19879—20058≤0.85≥420≥460≥19≥175.65A槡0—Q420GJQ460GJGB50017—200323GB50011—201024≤0.83≤0.85——≥15≥205.65A槡05.65A槡0εu≥20εy——εufuA0εstεyεy=fy/E。CAN/CSA-S16-0116CSAstandardG40.20/G40.21178260～700MPa。、。2.2ASTMA992/A992M、ASTMA913/A913M50GB/T19879—2005Y/T0.850.80。、、、、、。2。2A992/A992MA913/A913M50。2AASHTOLRFDbridgedesignspecifications250～690MPa400～760MPaY/T0.63～0.912526CAN/CSA-S6-06Y/T27BS43601990Y/T14BS5950-1200028JISG31362005SN29SA440590MPa0.8100MPa15。Y/TANSI/AISC360-05。210.80～0.850.910.95215%～20%324EN1993-1-1EN09432．1993-1-12。。。3-、、4、。3.1-、、-。1460690960MPa-460MPaQ460CS690S96030。1。-0.2%2.5%310.61Q460εst2%fuεu-fuεufyfu。-690MPafuεu。--。σt、εtσ、εσt=σ1+!LL()0=σ1+ε1εt=lnL1L0=ln!L+L0L0=ln1+ε2--2。-。-5。1-2-3.2Y/T-。Y/T。Sivakumaran26Y/Tfyfu3。Langenberg5S355S460S690S8904。4fyY/T1.0S690S8900.95S4600.8S355。5420460690960MPa。420MPaQ420B151920133264532460MPaQ46033-35、Q460DQ460C2439690MPaS6903637-421226S700MCS690QL1BISALLOY80HT80A514NIONICRAL70960MPaS960QL9。。55690MPa0.85690MPa960MPa0.90～0.95。690MPa0.85。2。。1.06。3.3。Langenberg54A。Langenberg、、5Z。5。。3.419996。Langenberg5T27J27J6。6S355EN10025。29432．、-。653.57-7a。7-43760Q420－3.6%0.06015Q4202.0%0.022690MPa－1.4%0.0734445－1.6%0.047。3。fyfu784647235MPaεstfuεu31-30。3fy/MPafu/MPaεyεst/%εu/%235MPa235370fy/E2.520460MPa460550fy/E2.014690MPa690770fy/E—8.0960MPa960980fy/E—5.5410.80～0.850.910.9515%～20%。2Y/T690MPa0.90～0.95。31.0。4--。5。。。。3920131InternationalAssociationforBridgeandStructuralEngineering．Useandapplicationofhigh-performancesteelsforsteelstructuresM．ZurichIABSE2005．2POCOCKG．HighstrengthsteeluseinAustraliaJapanandtheUSJ．TheStructuralEngineer2006842127-30．3．J．200930292-97．4．J．200810432-38．5LANGENBERGP．RelationbetweendesignsafetyandY/TratioinapplicationofweldedhighstrengthstructuralsteelsC//ProceedingsofInternationalSymposiumonApplicationsofHighStrengthSteelsinModernConstructionsandBridges—RelationshipofDesignSpecificationsSafetyandY/TRatio．Beijing200828-46．6．C//．200818-27．7GB/T1591—2008S．2009．8GB/T19879—2005S．2005．9BSEN10025-6Hotrolledproductsofstructuralsteels-part6technicaldeliveryconditionsforflatproductsofhighyieldstrengthstructuralsteelsinthequenchedandtemperedconditionS．LondonBSI2004．10ASTMA992/A992M-06aStandardspecificationforstructuralsteelshapesS．WestConshohockenPAASTMInternational2006．11A