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1、東南大學博士學位論文大跨懸索橋狀態(tài)評估實用方法研究與應(yīng)用姓名:郭彤申請學位級別:博士專業(yè):防災(zāi)減災(zāi)工程及防護工程指導(dǎo)教師:李愛群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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