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1、西安建筑科技大學(xué)碩士學(xué)位論文mainlyvertical;thefasterincreasedpeakdynamicstressofpilesandsoilalongthelongitudinaldirectionsofthesubgradebyincreasingthespeeds,thefasteritdecays,andthenumberofthelinetrainsrunnsisrelatedtothelaw;soildynamicstressdecayfasterthanthepilealongdepthofthepile,thedistributionofpiledynamic
2、stressalongthelengthofthepiledepthpresentsmorecomplex;thedynamicstressattenuationofpileandsoilalongthepilelengthisnotobviouswithtrainspeed.4.Vibrationonthesiteofthetrainrunningmainlyinthescopeoftheembankment,butthevibrationcausedbythevenuesoutsidetheembankmentshouldalsobegivendueattention;asthedep
3、thincreases,thevibrationatcompositefoundationcausedbytrainsfocusedinthepilebody;theinfluencedepthofvibrationcausedbytheimpactofthetrainrunningincreasesbecauseofCFGpilesexist;5.Withincreasingheightofsubgrade,thepeakdynamicstressontopofthepilecontinuedtodecline,whichshowsalinearrelationbetweenthem;t
4、heincreaseintrainlines,dynamicstressgrowthrateofcompositefoundationpileisfasterthansoil;theheightofsubgradeincreaseswithinacertainrangeforcompositeFoundationwithreducedaccelerationeffectismoreobvious,butwiththeincreasingheightofsubgrade,thistrendofdecreasemaygraduallyslowdown;6.Thefatiguelifecalcu
5、latedwiththemethodofcombiningthecriticalsurfacewithenergyislargerthanusingthevalueoflocalstress-strainmethod;themethodofcombiningthecriticalsurfacewithenergyisspecificallyclearbydefiningthedamagevariableisapplicabletotheanalysisofconcretefatiguelifewithmultiaxialstate,andcangivethelocationoffatigu
6、efailure.Keywords:High-speedrailway,ABAQUS,CFGpilecompositefoundation,traindynamicloading,fatiguelifeFundproject:1.TheresearchprojectinShaanxiProvince.“Thecomprehensivestudyofgeotechnicalandgeo-environmentalinXi’anconstruction”Issuefour:thesuitabilityandevaluationmethodofvariouspile.Itemnumber:201
7、1KTZB.2.Shaanxicoinnovationprojectsprojects.SettlementofrailtransportoperationsinXi'anintelligentdeviceformonitoringandevaluationofresearchanddevelopment.Itemnumber:2013KTCQ.萬方數(shù)據(jù)西安建筑科技大學(xué)碩士學(xué)位論文3.Studyonlong-termst
