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1、ATC&SEI2009ConferenceonImprovingtheSeismicPerformanceofExistingBuildingsandOtherStructures427SeismicAssessmentofBuildings,ConsideringPost-EarthquakeSafetyKarlTelleen,Rutherford&Chekene,SanFrancisco,ktelleen@ruthchek.comJoeMaffei,Rutherford&Chekene,SanFranc
2、isco,jmaffei@ruthchek.comJayYin,Rutherford&Chekene,SanFrancisco,jyin@ruthchek.comABSTRACTAdvancedSeismicAssessmentGuidelines,developedbyresearchersatStanfordUniversityandtestedbypracticingstructuralengineers,offerimprovementoverpreviousmethodsforseismiceva
3、luationofbuildingswherepost-earthquakesafetyisaconcern.Thisnewmethodallowsengineerstoevaluate,beforeanearthquake,howsafeitwillbetooccupyabuildingaftertheearthquake.Themethodmeasuresbuildingperformanceintermsofthepost-earthquakeoccupancyclassifications"Gree
4、nTag,""YellowTag,"and"RedTag,"definingtheseperformancelevelsquantitatively,basedonthestructure'sremainingcapacitytowithstandaftershocks.TheauthorshaveusedthismethodologytoperformseismicassessmentsforseveralbuildingsinthePacificGas&ElectricCompany(PG&E)util
5、itynetwork,includingelectricalsubstationsandotherfacilitiesinOakland,Berkeley,SanFrancisco,andVacaville.Analyticalandprobabilisticfeaturesofthemethodarealsoapplicabletomoretypicalseismicevaluationandretrofitprojects,whereevaluationofpost-earthquakeoccupanc
6、ytaggingisnotneeded.INTRODUCTIONMethodsfortheseismicassessmentofexistingbuildingshavebeenindevelopmentforanumberofyears.IntheUnitedStates,milestonesinthisdevelopmentincludetheATC-14reportEvaluatingtheSeismicResistanceofExistingBuildings[ATC1987],theFEMA273
7、documentNEHRPGuidelinesfortheSeismicRehabilitationofBuildings[ATC1997],andtherecentstandardASCE/SEI41-06SeismicRehabilitationofExistingBuildings[ASCE2007].OutsidetheUnitedStates,notablepublicationsonseismicassessmentmethodsincludetheapproachbyPark[1997],Se
8、ismicAssessmentandRetrofitofReinforcedConcreteBuildingsfromtheFéderationInternationaleduBéton[FIB2003],andAssessmentandImprovementoftheStructuralPerformanceofBuildingsinEarthquakesfromtheNewZealandSocietyforE
