鄭州市中心區(qū)鐵路跨線斜拉橋地震響應(yīng)分析.pdf

1、西南交通大學(xué)碩士學(xué)位論文鄭州市中心區(qū)鐵路跨線斜拉橋地震響應(yīng)分析姓名：喻明秋申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：祝兵20090301AbstractBridgesarethelifelineofhumanproductionactivities，butstrongearthquakeleadscrashingdestructionforbridgestructure，SOseismicresearchforbridgeisbe

2、enpayedmoreattentionto。Seismicresearchoflarge—spancable—stayedbridgeiStoguaranteethestructureadequatesecuritywhenearthquakeoccurredCablestayedOverpassBridgeinZhengzhoudowntownwithtwintowersandthreespanisaconcretecablesta

3、yedbridge，withatotallengthof460m，belongstoseismicintensity7andfirstclassbuildingTherefore，seismicresponseanalvsisisveryimportantandmeaningfulFiniteelementanalysissoftwareMIDAS／CIVILisusedtocarryoutadetailedseismicrespons

4、eanalysisforthisbridgeFollowingmainaspectsiscompleted：f1)MIDAS／CIVILisusedtoconstructthespacefiniteelementdynamicmodelandsubspaceiterationisusedforfreevibrationanalysis；(2)ResponsespectrummethodandCQC—typecombinationaret

5、akenforthedynamicanalysisLongitudinal，horizontal，verticalandseismicresponsecombinationwasconsidered；(3)Dynamictimehistoryanalysisisusedtocalculatetheinternalforceanddisplacementresponse，toanalysetheseismicresponseofcable

6、stayedbridgeunderseismicexcitationsE1一Centroseismicwavewhichiscarriedtothestrength，spec：trumadjustment，andNorthridgeseismicwavewhichonlyiscarriedtothestrengthadjustmentareselectedtocalculatethedisplacementandinternalforc

7、esofthebridgeBycomparingtheresults，influenceofseismicwavespectrumforseismicresponseofbrideisperformancedquantitativelyf4_)Resultsofresponsespectrumandtime—historyanalysisarecontrasted，andapplicabilityofresponsespectrumme