摘要
Fundamentalprinciplesfromstructuraldynamics,randomtheoryandperturbationmethodsareadoptedtodevelopanewresponsespectrumcombinationrulefortheseismicanalysisofnon-classicallydampedsystems,suchasstructure-dampersystems.Theapproach,whichisnamedtheperturbationspectrummethod,canprovideamoreaccurateevaluationofanon-classicallydampedsystem'smeanpeakresponseintermsofthegroundresponsespectrum.Toaccountfortheeffectofnon-classicaldamping,allelementsareincludedintheproposedmethodforseismicanalysisofstructure,whichisusuallyap-proximatedbyignoringtheoff-diagonalelementsofthemodaldampingmatrix.Moreover,ashasbeenadoptedinthetraditionalCompleteQuadraticCombination(CQC)method,thewhitenoisemodelisalsousedtosimplifytheexpressionsofperturbationcorrelationcoefficients.Finally,numericalworkisperformedtoexaminetheaccuracyoftheproposedmethodbycomparingtheapproximateresultswithexactonesandtodemonstratetheimportanceoftheneglectedoff-diagonalelementsofthemodaldampingmatrix.Intheexaminedcases,theproposedmethodshowsgoodagreementwithdirecttime-historyintegration.Also,theperturbationspectrummethodleadstoamoreefficientandeconomicalcalculationbyavoidingtheintegralandcomplexoperation.
出版日期
2010年05月15日（中国期刊网平台首次上网日期，不代表论文的发表时间）
