大跨度拱桥结构减振控制研究

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1、Y8S鑫5S3分类母篁她§!寮缓一——重庆交道大学单位代确擘垮1061803270t07硕士学位论文三缝墨坐虹鳃迎垒塑i业旦鲤2ControlofLong-spanArchBridgeStructure研究生姓名：塑焦导师姓名、职称：韩西教授申请学位级别r亟±一专业名称：论文答辩日期学位授予单位结构工程眷辩委员会j二帝：扇盘：坚趱评1司人：王盛耋蹬垄女：!整羞墨2006年4月28日论文摘要ABSTRACTArchbridgeisacommonstructurethathasbeenwidelybuiltinournation(especiallyinth

2、esoutheastregion)．Andbecauseofthenewmaterialandtechnology,thebridgebecomeslighter,thedimensionslender,thespanlarger,yetthetrafficincreases，whichmayresultsinthefatiguedamageduetovibration，andmaketheresearchofvibrationmoresignificant．Aimedatresponsecharacteroflarge·spanreinforcedco

3、ncretebox-typedarchbridgeandthepassivevibrationcontrol，themainstudiesareasfollows：(1)．Throughreferingtodomesticandoverseasliteratures，thepricinpleandmethodofpassivedvibrationcontroloflarge—spanreinforcedconcretebox-typedarchbridgesisstudied，and，thedesignpricinpleandtheprocesstech

4、nologyofMTMD(MultiTunedMassDamper)havebeenresearchedinthetext．(2)．Studyofvibrationresponseoflarge—spanreinforcedconcretebox—typedarchbridges．Byestablishingthefiniteelementmodalofarchbridgetestmodal，thenaturalvibrationcharacteroflarge—spanreinforcedcoBcretebox-typedarchbridgesisst

5、udied，themodalandtime-marchinganalysisismadeandthedynamicbehaviorsofbridgeanditsresponsecharacterunderrandomloadareanalyzed．(3)．Studyofvibrationcontroloflarge—spanarchbridgesbyTMD(’FunedMassDamper)andMTMD．First，thecontrolledmodalisconfirmed，andthentakingthemeansquareresponseascon

6、trolobjective，optimizationalparameter,includingoptimumfrequencyratio，dampingratio，erectionlocationandeffectivemassareobtained．Finally,bythetime-marchinganalysis，thevalidityofTMDandMTMDusedtoreducetheseismicresponseofthearchbridgeisverified．(4)．TestanalysisofvibrationcontrolofTMDa

7、ndMTMD．ThetestmodelofJinshajiangTongYangBridgewithascaleof1：50isestablishedbyorganicmaterials，andaccordingtothedynamicresponseofthemodelunderrandom，impulsiveload，andwhitenoisemotivation，theTMDparametersareoptimized．BythecomparisonsofdynamicresponseofarchedbridgewithandwithoutTMDa

8、ndMTMD，thevalidityofTMDandMTMDonarchedbr