地震下大坝损伤分析.docx

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1、Keywords:•concretegravitydams;•structuralcapacity;•damageindex;•nonlinearstaticpushover;•incrementaldynamicanalysis;•seismicperformance1.Topofpage2.SUMMARY3.1INTRODUCTION4.2NUMERICALMODELING5.3STATICPUSHOVERANALYSISOFTHEPINEFLATGRAVITYDAM6.4INCREMENTALDYNAMIC

2、ANALYSISOFTHEPINEFLATDAM7.5COMPARISONOFTHEIDAANDSPOCURVES8.6DAMAGEINDEXCALCULATIONS9.7CONCLUDINGREMARKS10.REFERENCESAnewconcepttodeterminestateofthedamageinconcretegravitydamsisintroduced・ThePineFlatconcretegravitydamhasbeenselectedforthepurposeoftheanalysisa

3、nditsstructuralcapacity,assumingnoslidingplaneandrigidfoundation,hasbeenestimatedusingthetwowell-knownmethods:nonlinearstaticpushover(SPO)andincrementaldynamicanalysis(IDA).Withtheuseofthesetwomethods,performanceandvariouslimitstatesofthedamhavebeendetermined

4、,andthreedamageindexeshavebeenproposedonthebasisofthecomparisonofseismicdemandsandthedam'scapacity.ItisconcludedthattheSPOandIDAcanbeeffectivelyusedtodevelopindexesforseismicperformanceevaluationanddamageassessmentofconcretegravitydams.Copyright©2012JohnWiley

5、&Sons,Ltd.I21INTRODUCTION2.SUMMARY3.1INTRODUCTION4.2NUMERICALMODELING5.3STATICPUSHOVERANALYSISOFTHEPINEFLATGRAVITYDAM6.4INCREMENTALDYNAMICANALYSISOFTHEPINEFLATDAM7.5COMPARISONOFTHEIDAANDSPOCURVES&6DAMAGEINDEXCALCULATIONS9.7CONCLUDINGREMARKS10.REFERENCESDamage

6、index(DI)measurestheamountofdamageanddegradationthatisimposedtoastructure.Itisaphysicalvaluethatiswellcorrelatedtoacriticalstateinastructure£1J-TheideaofdescribingthestateofdamageofthestructurebyonenumberonadefinedscaleintheformofDIisattractivebecauseofitssim

7、plicity⑵.ThedevelopmentofgeneralDisforapplicationinvariousstructuralsystemsismorecomplexthanthegenerationofDisforaparticularstructure.Empiricalandtheoreticalapproacheshavebeenappliedtoobtainvariousestimatesofstructuraldamage.Inthecaseofconcretedams,becausethe

8、reislimiteddatabaseoffieldandexperimentalobservationsofdamage,thenumericalmethodsforestimationofDIarepreferred.Usually,theDIusesasetofstructuralresponseparametersthatcanevaluatetheamounto