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1、附录StudyontheProprietyofRayleigh’sDampinginNonlinearDynamicAnalysisofBridgesSummaryInthispaper,basedontheresultsofcomparisonofnonlineardynamicanalysisof5spanbridgesconstructedontheI、Ⅱ、Ⅲregionsbythetwomethod(e.g.strain-energyproportionaldampingmethod&Rayleigh’sdampingmethod),param
2、etricstudyweremadetothemaximumbendingcurvatureofthepiers.Astheresults,itisfoundthattheRayleigh’sdampingmethodbringsacomparativelysmallapproachtothebendingcurvatureinmanycasescomparingwiththestrain-energyproportionaldampingmethod,andthebendingcurvaturevariousinacomparativelylarge
3、rareas.Andalso,comparativelycomputationsweremadetoacomplexbridgestructures,e.g.14spanbridgeanda3spancurvedbridge.SuggestionwasmadeonthepracticaluseoftheRayleigh’sproportionaldampingmethod.Keyword:nonlinear,dynamicanalysis,thestrain-energyproportionaldampingRayleigh’sdamping,brid
4、ges,themaximumbendingcurvature1.IntroductionAfterthenewaseismiccodeofbridgedesignpublishedintwoyearsagoinJapan,theRayleigh’sdampingmethodareoftenusedinnon-lineardynamicanalysisofbridgessincetheassumptionofdampingmatrixC=αK+βM,thetimeofcalculatingisshorterthanothermethod.Butthrou
5、ghthecomputationtothemanyengineeringproblem,itshowsthattheresultsbyRayleigh’sdampingmethodarevariouswiththedefinitionoftheparameter.Andalso,itisfoundthatthediscontinuesofbendingmomentweretakenplaceinsomepracticalanalysis.Inthispaper,basedontheresultscomparisonofnonlineardynamica
6、nalysisof5spanbridgesconstructedontheI、Ⅱ、Ⅲregionsbystrain-energyproportionaldampingmethod&Rayleigh’sdampingmethod,parametricstudyweremadetothemaximumbendingcurvatureofthepiers.Andalso,comparativelycomputationsweremadetoacomplexbridgestructures,e.g.14spanbridgeanda3spancurvedbrid
7、ge.2.TheStudytotheCommonTypeofBridges2.1AnalysisModelThe3bridgestobeanalyzedwereselectedaccordingtotheconditionsoffoundationsituatedinthedifferentregions.Bothofthemwere5spancontinuesbridgeswiththerubberbearing.ThebasicconditionsofthebridgeswereshowedinFig.1.Thestandardearthquake
8、wavefrombridgecodeofJapanwereinputatthebaseofpi
