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1、STUDYONTHEEFFECTOFFLUID-SOLIDCOUPLINGANDFOUNDATIONRADIATIONDAMPINGONSEISMICRESPONSEOFARCHDAMHaoRen,TongchunLi,LanhaoZhao,XinWang,DongLiangCollegeofWaterConservancyandHydropowerEngineering,HohaiUniv.,Nanjing210098,China,e-mail:renhaohhu@163.comAbstractEffectofdam-wa
2、ter-foundationdynamicinteractionandfoundationradiationdampingwereconsideredinthecourseoftheseismicresponsetime-historyanalysisonWuDongdearchdam,withgeneralizedNewmarkalgorithmmethodandtransmittingartificialboundarycondition.Bycomparingthenumericalresultswiththeconv
3、entionalmethodofthemasslessfoundationwithfixedboundaryandwithoutconsideringfluid-solidcouplingeffect,theinfluenceoffluid-solidcouplingandfoundationradiationdampingforseismicresponseofarchdamwereobtained.Theresultsshowthattheseismicresponseofarchdamincreasealmost25%
4、withconsideringtheeffectoffluid-solidcouplingofwater-damandtheseismicresponsedecreaseabout20%~40%withconsideringtheeffectoffoundationradiationdamping.Keywordsarchdam;fluid-solidcoupling;radiationdumping;transmittingboundaryviscousboundary(Lysmer1969),paraxial.appro
5、ximationboundary(Clayton1980),1INTRODUCTIONsuperpositionboundary(Smith1973),transmittingboundary(Liao1984)andviscous-springboundaryArchdamisastaticallyindeterminateshell(Deeks1994)etc.,inwhich,transmittingboundarystructure,sotheseismicresponseofitisverymethodcandi
6、rectlysimulatetheprocessofthecomplex.Inanearthquakeprocess,thevibrationofwaveenergydispersioninthemodelboundary,itthedamandfoundationcausethevibrationofwater,considertheerroroftransmissionmethodasaandproducestheadditionalhydrodynamicpressure,propagatingoutwardwave,
7、anditisindependentofwhich,inreverse,actsonthedamandchangestheincidentangle,thesimulationofwavepropagationdynamiccharacteristicsandresponseofthedam,processisintheformofdiscretization,soitcanbethesewholeprocessreflectsintensefluid-solideasilycombinedintoFEMprogram.In
8、thispaper,couplingeffect.Therefore,dam-water-foundationthegeneralizedNewmarkalgorithmmethod(Yaninteractionanalysisisanimportantsubjectofarch2003)
