变剪模半空间上基础竖向振动分析与土动力特性试验分析

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1、硕士学位论文ABSTRACTAnintegralrepresentationfordisplacementsofacircularfootingvibratingverticallywithalinearwavevelocityonaelastichalf—spacewhoseshearmoduluschangesnon—linearlywithdepthwaspresentedbyanalysis．dynamictriaxialtestondynamicmodulusanddampingratioofsoilswasalsoca

2、triedout．Soil·structuredynamicinteractionisaobjectivephenomenon，Whileanalyzingthesoil—structuredynamicinteraction，tiisoffirstimportancetObuildthetranslationrelationshipbetweenthevibrationofsiteandstructure．Itisaeffectivewaytofocusontheanalysisoftheforceandmovmentofthe

3、foundationwhilebuildingthatrelationship．Inthiswaythefoundationwillbeeffectedbythevibrationforceofthestructure．AllthisforcewillbefcIrmulatedwithmovementoftheundersideoffoundation．SOtiistheprincipalsteptOconfirmthemovementoftheundersideoffoundation．，sequentiallyconfirmt

4、herigidoffoundation．Oncetherigidoffoundationisfound，itcanbethereferenceoftheintegermovementeq—uation．Otherwise，themeaningofdynamicrigidoffoundationtodanamicmachinefoundationisobviously．Basedontheresearchandthepracticaldatum，asitemodelispresentedthattheshearmodulusisdi

5、stributedexponentiallyincreasingwithdepth．Themethodofintegraltransformhasbeenintroducedfortheanalysisofacircularfootingvib—ratingverticallywithalinearwavevelocityonaelastichalf—spacewhoseshearmoduluschangesnon—linearlywithdepth．Thedynamicproblemcouldbeform—ulatedasase

6、tofdualintegralequations．Anintegralrepresentationfordispt—acementswaspresentedbyanalysis．Therepresentationcanbeusedtonumericalanalysisandtheoryreference．Furthermore，thecarveoffrequenceandresponseispresented．Indynamicanalysisitisimportanttomakecleardynamicbehaviorofsit

7、esoils，ofwhichtheparametersarenecessaryfortheoreticalanalysisandnumericalanalysis．Thenoneoftheproblemsintheprojectishowtodeterminethepar—ametersandtheirregularityusingthetestequipments．Thereforedynamictriaxialtestisconductedtodeterminethedynamicmodulusanddampingratioo

8、fsiltycla—Yofthesite，whereamodeltestaboutsoil—foundation—structuredynamicinteract—ionwillbedone。Becausetherelationshipcurves