基于壓電陶瓷的鋼管混凝土界面剝離損傷監(jiān)測(cè)的實(shí)驗(yàn)研究.pdf

1、湖南大學(xué)碩士學(xué)位論文基于壓電陶瓷的鋼管混凝土界面剝離損傷監(jiān)測(cè)的實(shí)驗(yàn)研究姓名：張婷申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：許斌20110528幕十限IU陶瓷的鋼琶：混凝十柱界面剝離損傷：惰測(cè)的實(shí)驗(yàn)fiJf=究AbstractWithexcellentstructuralperformanceincludinghigherloadcarryingcapacity，goodenergyassumptioncapabilityandducti

2、lityconvenience，andeconomyinconstruction，ConcreteFilledSteelTube(CFST)structuralmembershavebeenextensivelyadoptedasverticalloadcarryingstructuralcomponentsincivilinfrastructuressuchaslargescaleindustrialplants，highrisebu

3、ildingandbridgesBytheuseofsteeltubethecoreconcreteiSintriaxialcompressionstressstateandthecorrespondingstrengthofconcretecanbeimprovedOntheotherhandwiththesupportoffilledconcretethestabilityoftubecanbeenhancedAvarietyoff

4、actorsmayleadtodebondingbetweenconcreteandsteeltube，whichmaymakegreatimpactontheloadcarryingcapacityandductilityoftheCFSTButtheinvisibilityofdebondingbetweentheconcreteandsteeltubemakesitdifficulttodirectdetectThedevelop

5、mentofreliabledebondingdamagedetectionmethodiscrucialEvenvarioustraditionalNondestructiveEvaluation(NDE)technologiesincludingthehammerimpact，ultrasoundandfiberbragggratingdetectionhaveshowntheirpotentialfordetectingdebon

6、dingbetweenconcreteandsteeltubeButmostofthecurrentmethodsusuallyneedheavytestingequipments，andarenotapplicableforonlinemonitoringInthispaperexperimentalstudyondebondingmonitoringofaconcretefilledsteeltubebasedonPZTisprop

7、osedThemaincontentsinclude：1Afterintroducingbackgroundandthesignificanceofthestructuralhealthmonitoring，theapplicationofpiezoelectricceramicmaterialsincivilengineeringisoverviewed2AnumberofsmartaggregatesbasedonPZTareemb

8、eddedinthecoreconcreteandanumberofPZTpatchesarebondedonpredeterminedlocationsoftheoutsidesurfaceoftheCFSTspecimenassensorsAdebondingdetectionmethodwithPZTisproposedInthismethod，theSAsareexcitedwithsweepsinusoidalsignalsa

9、ndtheresponseofthePZTpatchesarerecordedwithahigh—speeddataacquisitionsystem3ExperimentstudyonascaleCFSTmemberiscarriedout，theamplitude，frequencyspectrumofthemeasurementofPZTpatchesandanenergyindexdefinedwiththewaveletpac