考虑行波效应的高拱坝地震动响应分析

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中图分类号：TV642.4 文献标识码：A 文章编号：1001-9235（2025）07-0115-07

Abstract：Theseismicperformanceassessmentofa3-m-levelhigharchdamhasgenerallyadoptedananalysis modelbasedonthe dynamicinteractionbetweenthedambodyandthefoundation.However，thehorizontalspatialscaleofthegroundmotioninput boundaryatthebottomof theanalysismodelincudingthefoundationcanreachseveralkilometers，withalargespatialspan.Thnonuniformityof groundmotionontheorizontalexteralbundaryofteodelsouldnotbeignoed，specialludernearfaultgound motion.Tostudytheinfluenceoftheuniformgroundmotioninputoftheexternalboundaryonthedynamicresponseof thearchdam， thispapertakesacertain27O-m-levelhigharchdamasanexampleandadoptstheETAmethodtoanalyzethenfluenceoftheuniform inputandhenonunifoinputconsideringtetravelingwavefectothedisplacement，tress，nddamageresponseofhdamIt isfoundthat，comparedwiththestressresponseresultsofthearchdambtaiedbyuniforminput，themaximumarchstressnsome areas ofthe archdamstressresposeconsidering thetraveling waveefect increases，whilethemaximumbeam stressdecreases，nd thestressontheinputsideoftheground motionincreasessignificantly.Comparedwiththeuniforminput，thedamageresponselawof thedamwithtravelingwaveeffectismainlythatthedamagetotedamfaceisreduced，hiletedamagetotherchendandedam

botomincreases.Fromthemaximumdisplacementofthedamtoprelativetothedambotom，itcanbeseenthatthetravelingwave inputincreasesthedamtopdisplacementsignificantlyrelativetotheuniforinput.Fromthespatialpointofview，thedamtop displacementnartheleftbankincreasessigiicantlyupstream，thedamtopdisplacementdecreassasitmovestoterightbank，and the dam top displacement near the right bank increases significantly downstream.

Keywords： concrete arch dam; traveling wave effect; non-uniform input; finite element simulation

中国西部地区为地震动高烈度区，也是水电能源丰富的地区。（剩余6946字）