分布式光纖傳感性能及工程應(yīng)用研究.pdf

1、東南大學(xué)碩士學(xué)位論文分布式光纖傳感性能及工程應(yīng)用研究姓名：張彪申請學(xué)位級別：碩士專業(yè)：防災(zāi)減災(zāi)工程及防護(hù)工程指導(dǎo)教師：繆長青20090601AbstractResearchontheSensingPerformanceandEngineeringApplicationofDistributedOpticalFiberGraduateStudent：ZHANGBiaoAdvisor：ProfMIAOChangqingCollegeofCi

2、vilEngineeringSoutheastUniversityAbstract、MththedevelopmentofConstructionEngineeringandTrafficEngineeringgreatconcernhasbeenpaidtothesafety，durabilityandnormalusefunctionoflarge—scalebuildingandbridgestructuresSomenewtyp

3、eofsensortechnologies，whichagegraduallyappliedtotheconstructionandtra幣cengineeringstructuralmonitoringhasdevelopedveryfastFBGandBOTDAaretwoadvanceddistributedopticalfibersensingtechnologies，whichbreakthroughthetraditiona

4、lconceptofpointsensingandCallbeusedtomonitorthedistributedstraininformationofthestructure111eyprovideapowerfulmeansforthebuildingandbridgestructures’monitoringanddiagnosisThispaperhasbeensystematicallyresearchedondistrib

5、utedopticalfiber$gnsorcharacteristicsandstrainandtemperaturecrosssensitivityproblemintroducedseveralcommonlyusedmethodtoeliminatetemperature—sensitiveoftemperaturecompensationAtthesametime，twotypesofsensingtechnologyarec

6、omparedandthecalibrationtestisdoneBasedonthetwosensingtechnology，structuralstrainismonitoredinaseriesofexperiments，andstructuralhealthmonitoringsystemofaspecial—shapedtiedarchbridgeisstudiedThemaincontentsinclude：(1)This

7、paperintroducesopticalfibersensingtechnologyprincipleofFBGandBOTDA，thestrainandtemperaturesensingpropertiesoftheFBGandfiberaswellasthestrainandtemperaturecross—sensitivityproblemhavebeenanalyzedThentheprincipleandmethodo

8、fthetemperaturecompensation鵲wellastheimpactoftemperaturecompensationatactualslructurestrainmonitoringaleanalyzed(2)Studyofcomparingthetwotypesofsensingtechnologyandtheirstrainandtemperaturesensivityarecalibratedexperimen

9、tallyTheresultsshowthatatstrainandtemperatureofFBGandbarefiberdifferentstages，thestrainandtemperaturesensivityvarieslinearlybutatstrainandtemperatureoftight—bufferedopticalfiberdifferentstages，thestrainandtemperaturesens

10、ivityaredifferent(3)Forthesensingfiberwithcoatingandjacketusedinproject，itsfmiteelementmodelWaSbuiltbyANSYSinfiniteelementanalysissoft：wareAndfortheembeddingfibertheinfluencesaffectedbyelaSticmodulusandthicknessofthefibe

11、rcoatingandjacketandelasticmodulusofmatrixmaterialareanalyzedForthesurfacebondedfibertheinfluencesaffectedbyelasticmodulus，widthandthicknessofthebondingmaterialareanalyzed(4)TheFBGandBOTDAopticalfibertransfertechnologyis

12、appliedinthetensiletestofhiighstrengthsteelstrandandstrengtheningtestofmasonrywallswithpolymermortarThestrainchangeofhighstrengthsteelstrandundereachleveltensileloadismonitoredwithFBQanditsfeasibilityisstudiedinthispaper

13、ThestrainofsteelstrandandpolymermortarusinginthestrengtheningofmasonrywallsismonitoredwiththeFBGandBOTDAtechnologythestrainchangeismonitoredinbothloadcontrolperiodandthedisplacementcontrolperiodIt。sconclusedthattheBOTDAo