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1、東南大學(xué)博士學(xué)位論文大跨懸索橋狀態(tài)評(píng)估實(shí)用方法研究與應(yīng)用姓名:郭彤申請(qǐng)學(xué)位級(jí)別:博士專業(yè):防災(zāi)減災(zāi)工程及防護(hù)工程指導(dǎo)教師:李愛(ài)群20050701ABSTRACTTheresearchandicsapplfcationofbridgeconditionassessmentbecomesahotandimportalltfieldinciv訂engineeringwiththegrowinganentiontotheperforrnance
2、aIldreliabilityof】ongspaIlbridgesMeallwhile,ther8piddevejopmentofcorrelativetechnjquessuchasthevibrationtest,signaldlsposal,d鋤ageidentmcationmakesilpossbletealizetheonlineevaluationofJongspanbridgesBasedonexistingtheorya
3、ndresearch,lhispaperfocusesintheresearchof印pliedmethodsofconditionassessmemandprovidessomeusefulreferenceIot1econditiOnaSsessmentsystemofRunyangbrjdgeInthispapeLthecomparativelypopularornewmethodsarecomprehensivelysummar
4、izedTbreaIjzethebridgeconditionassessment,aproperFEmodelisrequjred,sothemodelmod訊cationoflOngspansuspensionbridgea11ditsupdatingmethodarediscussednrstBasedonthis,thoprobabilityanalysismethodusi“gnumericalsimulationisfunh
5、erresearched,whichisaIlemphasisofmispapeLMoreoveLinordertonndouttlecomprehensiveperf0啪鋤cecapacityofbridges,the如zzyana】ytichierarchyproc髓sisdedicateda11dthecompositiVecondjtionassessmentsystemissetupThemainworkoft|lispape
6、risasfollows1ModelmodmcationaIldupdatingoflongspa士1bridgeforcondi廿蛐assessmentAccordingtotheneedofconditionassessmem,theFEmodelmodi廳cationmethodusingoptimizationprocessbprovjded,a力dtheFEmodelofRuny卸gsuspensjon嘶dgejsmodj石e
7、dbyzeroordermen】odandfirstorderoptimizationme也odTheresultsshowthatt11ezero—ordermethodhasar叩idconve唱espeed,andwhenthecurvefiniIlgofstatev狐abJesisbyquadraticpIuscmsstelms,theprecisionofa11aIysiscanbasicallymeettheneedofmo
8、delmodificatiomitshouldbeusedwh朋t11enumberofdesignv撕ablesislessthant、ventyThe五rstorderoptimizationmethodhasabetterprecisjonbutisratherslowintheconvergespeed,moreoverwhenthetoleraIlceofobjectivefunctionisnotsmallenou曲,t11
9、ebestsolu石onmaybealocalone,itc柚beusedwhenthenumberofdesjgnv撕ablesismoreth柚twentyoramorepreciseanalysisisrequired2SimulationofnonlinearbehaviorunderdamagedsitIlationJnordertosimulatethenonlinearbehaviorofsllspensionbddgeu
10、nderservicea11ddarnagedsituations,柚adap廿veNewton—Raphsonarithmeticisin訂oducedaftermemodmcationof血eoriginalmodel,meposinona11dm℃ssofcablesarecalclllatedpreclselyThismethodproVidesanicetoolfortlleupdatingofmeFE啪del,especia
11、llyjndalllagedcaSes,and丘nallyamorereHabjeFEmodelisachieved3,ResearchinmetheoryofnumericalsimulationIntllispan,thekeytechniquesarediscussedThrou曲也ecompareofMontecarlomethoda11dResponseSu—hcemethod,thechamcteristics,t11epr
12、ocessandthesystemicerroraresuITlmarizedBasedontIlis,acombinedmethodofsimulationisdedicatedaSabaSict001fortheprobabilityaflalysisofRunyangb—dgeThecombinedsimu】ationmethod廿鋤sferstheo打gi衄lcomplexqueslion“pmbabⅢ哼硼alySjsintot
13、hes01utionofaseriesofmultinomial,m捌ngtheefflciencyimprovedsignmcaIltIysothat也eprecjsionofanalysisisalsoincreased盯eatly4Applicationofthecombinedme山odinreliabilityassessmentofRunyangbridgeBasedonthiscombinedmethod,thepmbab
14、ilityanalysisofRuny如gsuspensionbridgeismade,theprobabjlistjcsensjavitjes,tllecorrelatjonsbetweenrand鯽varjab】esandthere】iabiJj砂ofsnuctures黜analyzedinnonnalaIldheavytramcs詛terespectivelyInthispapeLseVerald鋤agesituationsare
15、simuIatedtoeVaiuatethereIjabiIityoftllebridgeundert|lecenaindamagesinlationThoseresuItsproVidesomeusefulreferencestot11e蛐mcturalhealthmonitoringsystemOfRu“yangBridge5Researchinthemz巧anal”ichierarchypmcessTbgetamorecompre
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