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  • 简介:TheFirstConferenceofthe4thSessionoftheSpecialCommitteeonSeismology,SSCheldinChengdu¥//The4thSessionoftheCommitteeonSeismology...

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  • 简介:Inhighlypopulatedurbancenters,traditionalseismicsurveysourcescannolongerbeproperlyappliedduetorestrictionsinmoderncivilianlifestyles.Theambientvibrationnoise,includingbothmicroseismsandmicrotremor,thougharegenerallyweakbutavailableanywhereandanytime,canbeanidealsupplementarysourceforconductingseismicsurveysforengineeringseismologyandearthquakeengineering.Thisisfundamentallysupportedbyadvanceddigitalsignalprocessingtechniquesforeffectivelyextractingtheusefulinformationoutfromthenoise.Thus,itcanbeessentiallyregardedasapassiveseismicmethod.Inthispaperwefirstmakeabriefsurveyoftheambientvibrationnoise,followedbyaquicksummaryofdigitalsignalprocessingforpassiveseismicsurveys.ThentheapplicationsofambientnoiseinengineeringseismologyandearthquakeengineeringforurbansettingsareillustratedwithexamplesfromBeijingmetropolitanarea.Forengineeringseismologytheexampleistheassessmentofsiteeffectinalargeareaviamicrotremorobservations.Forearthquakeengineeringtheexampleisforstructuralcharacterizationofatypicalreinforcedconcretehigh-risebuildingusingbackgroundvibrationnoise.Byshowingtheseexampleswearguethattheambientnoisecanbetreatedasanewsourcethatiseconomical,practical,andparticularlyvaluabletoengineeringseismologyandearthquakeengineeringprojectsforseismichazardmitigationinurbanareas.

  • 标签: 工程地震学 地震工程 环境噪声 城市中心 北京地铁 都市圈