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隔震橡胶支座受弯力学性能研究（英文）.docx

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隔震橡胶支座受弯力学性能研究（英文） ResearchontheFlexuralMechanicalPerformanceofIsolationRubberBearings Introduction: Isolationrubberbearingsareakeycomponentofmanymodernbuildingsandstructures.Thesebearingsareusedtoabsorbanddissipateenergyduringseismicevents,thusprotectingthebuildingfromdamage.Overtheyears,designersandengineershaveworkedtodevelopbetterisolationbearingdesignsthatcanprovideevengreaterprotectionagainstseismicforces.Oneareaoffocushasbeentheflexuralmechanicalperformanceofisolationrubberbearings,whichisthesubjectofthispaper. Background: Isolationrubberbearingsaredesignedtoabsorbanddissipateenergyduringseismicevents.Assuch,theymustbeabletowithstandlargedeformationswithoutfailing.Thedeformationsthatanisolationbearingexperiencesduringanearthquakecanbedividedintotwobroadcategories:shearandflexural.Sheardeformationsoccurwhenthebearingmoveshorizontally,paralleltotheground.Thesearetypicallywell-understoodandaccountedforinisolationbearingdesign.Flexuraldeformations,ontheotherhand,occurwhenthebearingissubjectedtoverticalloads.Theseloadscancausethebearingtobendortwist,resultinginlargedeformationsthatcanleadtofailure. Research: Tobetterunderstandtheflexuralmechanicalperformanceofisolationrubberbearings,researchershaveconductedanumberofstudies.Thesestudieshavefocusedonavarietyoffactorsthatcanimpacttheperformanceofthesebearings,includingmaterialproperties,bearinggeometry,andloadingconditions. Onestudy,forexample,examinedtheeffectofbearinggeometryontheflexuralperformanceoflaminatedrubberbearings.Theresearchersfoundthatbearingswiththickerrubberlayersandstiffersteelplatesprovidedbetterflexuralperformancethanthinnerrubberlayersandmoreflexiblesteelplates.Additionally,theresearchersfoundthatbearingswithmorelayersofrubberandsteelperformedbetterthanthosewithfewerlayers. Anotherstudyexaminedtheeffectoftemperatureontheflexuralperformanceofrubberbearings.Theresearchersfoundthattheflexuralstiffnessofthebearingsdecreasedasthetemperatureincreased,duetothetemperature-dependentpropertiesoftherubbermat