seismic vulnerability assessment methods for buildings in Japan

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1、EarthquakeEngineeringandEngineeringSeismologyOtani:SeismicvulnerabilityassessmentmethodsforbuildingsinJapan4747Volume2,Number2,September2000,pp.47–56SeismicVulnerabilityAssessmentMethodsforBuildingsinJapan1)ShunsukeOtani1)DepartmentofArchitecture,GraduateSchoolofEngineering,UniversityofTokyo,Japan

2、,otani@sake.t.u-tokyo.ac.jpABSTRACTThedevelopmentofseismicvulnerabilityevaluationstandardsforreinforcedconcretebuildingsinJapanisbrieflyreviewed.Damagestatisticsareshowntoindicatethatseveredamagewasobservedinarelativelysmallpercentageofexistingbuildingsevenafterdamagingearthquakesintheworld.Theref

3、ore,asimplescreeningprocedureisnecessarytoidentifysuchvulnerablebuildingsoutoftheexistingbuildingstock.Afterdiscussingtheprinciplesofseismicvulnerabilityassessmentusingasimplesingle-degree-of-freedomsystem,applicationstomulti-degree-of-freedomsystemsandtostructuresofirregularconfigurationarediscus

4、sed.AgeneralprocedureconsistentwiththepresentdesignprovisionsinJapanisintroduced.INTRODUCTIONbuildings.TheconcernwasexpressedbymanyorganizationsabouttheMostbuildingcodesintheworldearthquakesafetyofexistingreinforcedexplicitlyorimplicitlyacceptstructuralconcretebuildings;e.g.,theMinistryofdamagetoo

5、ccurinabuildingduringEducationaboutschoolbuildings,thestrongearthquakesaslongasthehazardMinistryofConstructionabouttolifeisprevented.Indeed,manygovernmentbuildings,andconstructionearthquakescausedsuchdamageinthecompaniesabouttheirclients’buildings.past.SeismicdesigncodeswereVariousmethodsweredevel

6、opedfortheimprovedaftereachearthquakedisasters,seismicvulnerabilityassessmentofbutoldconstructionswereleftexistingbuildingsagainstfutureunprotectedbynewtechnology.earthquakes.The1968Tokachi-okiearthquakeTheMinistryofConstructioncausedsignificantdamage,forthefirstorganizedacommitteein1976totimeinJa

7、pan,toreinforcedconcretedevelopanintegratedmethodtoevaluatebuildings;i.e.,reinforcedconcretetheseismicvulnerabilityofexistinglow-columnsfailedinshearinschooltomid-risereinforcedconcretebuildings.48EarthquakeEngin