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1、DissertationftheMaster?sDegreeinEngineeringENGINEERINGACTERISTICSOFWENCHUANEARTHQUAKEDEVELOPMENTOFATTENUATIONMODELCidate：SahirSagharSupervis：Prof.ZhaiChanghaiAcademicDegreeAppliedf：Master?sinCivilEngineeringSpeciality：Di
2、sasterpreventionreductionprotectionengineeringAffiliation：SchoolofCivilEngineeringDateofDefence：June2014DegreeConferringInstitution：HarbinInstituteofTechnologyContentsIITableofContentsAbstract(InEnglish).................
3、........................................................................?Abstract(InChinese).........................................................................................?Chapter1Introduction……................
4、...........................................................................11.1Objectiveofthestudy……………………………….........................................11.2MotivationApproachScopeofthestudy................................
5、............11.3Reviewofpastresearches…………………….................................................21.4GeneralBackground…………………………….................................................41.5ganizationofthethesis…………………............
6、.........................................5Chapter2acteristicsofgroundmotionsfWenchuanearthquake...............72.1Intoduction...............................................................................................
7、.........................72.1Groundmotiondataset....................................................................................................82.3Spectralcteristics..................................................
8、..................................................82.3.1Predominantspectralperiod(Tp)............................................................................82.3.2Smoothedspectralpredominantperiod(To)................
9、...........................................92.3.3Averagespectralperiod....................................................................................92.3.4Meanperiod..................................................
10、....................................................102.3.5Cumulativeabsolutevelocity.................................................................................102.3.6Accelerationspectrumintensity..................
11、...........................................................102.3.7Velocityspectrumintensity....................................................................................112.3.8AriasIntensity........................
12、.................................................................................112.3.9Analysisconclusions........................................................................................112.3Durationacteristics.
13、................................................................................................212.3.1Bracketedduration..................................................................................................21
14、2.3.2Unifmduration....................................................................................................212.3.3Significantduration............................................................................
15、....................222.3.4Analysisconclusions.......................................................................................232.4Directivityacteristics............................................................
16、..................................252.4.1Directivity................................................................................................................252.4.2Analysisconclusions..............................
17、.........................................................262.5Elevationeffects..............................................................................................................362.5.1Analysisconclusions......
18、.................................................................................362.6Radiationpattern.............................................................................................................382.6.1An
19、alysisconclusions.......................................................................................39Chapter3Chapter3AttentionModelfAttentionModelfPGAPGA..............................................................
20、....................................................................................................40403.1Intoduction......................................................................................................
21、................403.2Regressionanalysismethodflowt..................................................................403.3Generalmodelfpredictiverelationships...............................................................
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