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1、EngineeringApplicationandRecentResearchAdvancesofHighStrengthSteelStructuresSHIGang,BANHuiyong(KeyLaboratoryofStructuralEngineeringandVibrationofChinaEducationMinistry,DepartmentofCivilEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Highstrength(nomi
2、nalyieldstrengthfy³420MPa)andultra-highstrength(nominalyieldstrengthfy³460MPa)steelstructureshavebeguntobeappliedinbuildingandbridgestructures,sincetheexcellentpropertiesofhighstrengthsteels(HSS)andhighperformancesteels(HPS)hadprovidedengineersaninnovativesoluti
3、ontoconstructmoreefficientandeconomicalsteelstructures.Thispaperreviewsthedevelopmentandapplicationofsuchkindofsteelstructures.ThesteelgradesofHSSandHPSforbuildingscurrentlyavailableinChinaareintroduced.ThemechanicalpropertiesofHSSandHPSarediscussedandsummarized
4、.TherecentresearchesconductedinChinaondesignmethodsofapplyingHSSandHPSinbuildingsareoutlined.Keywords:steelstructure;highstrengthsteel;ultra-highstrengthsteel;engineeringapplication;mechanicalproperty;bucklingbehaviorWiththedevelopmentofthesteelmaterialinstructu
5、ralengineeringsincethestructuralmechanicalpropertiesandthesteelproductionmethod,performanceandfailuremodesofsteelstructuressuchasthethermo-mechanicalrollingandthefabricatedwithHPSwillbesignificantlydifferentquenchingandtemperingprocess,highstrengthfinewithconven
6、tionalsteelstructures.Necessarygrainstructuralsteelswithexcellentweldabilityandresearcheshadtobecarriedouttounderstandtheductilityhavebeguntobeappliedinmanysteelstructuralresistance,ductilityanddeformationunderstructures,includingbuildingandbridgestructuresinvar
7、iousloadingstates,especiallyearthquake[5]Japan,Europe,America,Australia,Chinaandotherconditions.Thecorrespondingdesignmethodsandcountriesanddistricts.TheapplicationofHSSleadsfabricationtechnologyhadtobeupdatedandtonotonlylightweightbutalsosimplestructures.Inimpr
8、oved.Thedesignstandardandguidancehavetolastdecade,therearestrongdemandsworld-widelyonberevisedandmandatedtohelpengineersapplyHSS[1]-[3]structuralsteelwithhigherstreng