1、河海大學(xué)碩士學(xué)位論文動(dòng)力參數(shù)法識(shí)別混凝土結(jié)構(gòu)損傷研究姓名：蔣勇申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：丁曉唐20060401英文摘要ABSTRACTBecauseofvariousfactors，damage，whichwillleadtoseriousconsequence，willinevitablyappearincivilengineeringstructuresTherefore，itisnecessaryforengine

2、eringstructurestobemonitoredforhealthStructuralHealthMonitoring(SHM)andRestorationisafocalpointofNationalNatureScienceFoundationofChinaincivilengineeringfieldItisalsoahotsubjectininternationalengineeringfieldpresentlyand

3、hasveryimportantengineeringbackgroundandpracticevalueSHMincludesdamageidentificationandcapabilityevaluationTheoryandmethodofdamageidentificationofstructuresistheresearchcoreofSHMInthisthesisresearchaboutdamageidentificat

4、ionofstructuresiscarriedonwiththeemphasisonthestudyofdynamicparametermethodbasedonvibrationThemaincontentsaresummarizedasfoUows：1Somedamageidentificationmethodsofstructuresincomnlonusearediscussed仉1eprocedureofdamageiden

5、tificationmethodsbasedonvibrationismainlyanalyzedThatfindingthedynamicparameterswhichcanindicatestructuraldamagessensitivelyisthekeypointofthemethodisemphasizedDynamicparameterdeterminessnccessorfailureandeffectivenessof

6、thedamageidentificationmethods2IflthedamageidentificationmethodbasedonvibrationthemodalanalysisofhealthyRCstructuresbyFEMisoftenneededAfterthediscussionofanalysismethodofRCstructuresbyFEMineommonuse，themodelanalysismetho

7、dofRCstructuresbasedonFEMprogramANSYSisstudiedBecausenonlinearcharacterofmaterialscan’tbetakenintoaccountinmodalanalysisinANSYS，themodalanalysisofRCstructuresbyANSYScanonlygetapproximateresult3Thedynamicparameterswhichar

8、ecommonlyusedindamageidentificationaremainlydiscussed，suchascurvaturemode，rotationangleofmodeshape，flexibifitymatrix，flexibilitycurvature，strainmode，modalstrainenergyandsoonTheircharacteristicsandapplicabilityarestudieda

9、ndverifiedbysomenumericalexamplesorstructuralexperiments4Theidentificationcapacityofdifferentdynamicparameterswhichincludescapacityofidentifyingearlydamages，damagesofdifferentdegreesandpositions，isnumericallyanalyzedCert

10、aindynamicparameterswhichcanidentifyearlydamagesordamagesofdifferentdegreesandpositionsofstructuresarefoundout5Thedynamicparametersmentionedinthethesisareoverallevaluatedbasedonthesummarizationoftheanalysisofdynamicparam