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1、公路交通科技第卷上承式大跨度鋼管混凝土拱橋地震反應(yīng)分析張波1，李術(shù)才1，楊學(xué)英2，孫國(guó)富1，葛顏慧1，魏建軍3，李傳夫1（山東大學(xué)巖土與結(jié)構(gòu)工程研究中心，山東濟(jì)南250061）(山東城市建設(shè)職業(yè)學(xué)院，山東濟(jì)南250014)(中國(guó)礦業(yè)大學(xué)，江蘇徐州221008）摘要：為研究上承式大跨度鋼管混凝土拱橋的地震反應(yīng)性能，以大型有限元計(jì)算軟件ANSYS為平臺(tái)，分別以縱向+豎向和橫向+豎向遷安波與EICentro波作為輸入地震波，對(duì)跨徑為430m的上承式鋼管混凝土拱橋——支井河特大橋進(jìn)行了地震反應(yīng)分析。研究結(jié)果表明：前10階振動(dòng)以側(cè)
2、向振動(dòng)為主，表明橋縱向剛度遠(yuǎn)大于側(cè)向剛度；拱肋抗震設(shè)計(jì)最危險(xiǎn)截面是拱腳截面，地震反應(yīng)內(nèi)力最大；橫向＋豎向地震動(dòng)輸入時(shí)拱肋軸力及彎矩Mz略大于縱向＋豎向地震動(dòng)輸入時(shí)，相差幅度不大，但橫向＋豎向地震動(dòng)輸入時(shí)彎矩My遠(yuǎn)大于縱向＋豎向地震動(dòng)輸入；在橫向＋豎向地震動(dòng)輸入下最危險(xiǎn)截面――拱腳處的地震反應(yīng)軸力內(nèi)側(cè)拱肋大于外側(cè)拱肋。關(guān)鍵詞：橋梁工程;地震反應(yīng)分析;ANSYS;上承式鋼管混凝土拱橋;支井河特大橋中圖分類號(hào)：U448.22文獻(xiàn)標(biāo)識(shí)碼：ATheSeismicResponseAnalysisofDeck-typeLong-Spa
3、nCFSTArchBridgeZHANGBo1,LiShu-cai1,YANGXue-ying2,SUNGuo-fu1,GEYan-hui1,WEIJian-jun3,LIChuan-fu1(GeotechnicalandStructuralEngineeringResearchCenter,ShandongUniversity,Jinan250061,China)(ShandongUrbanConstructionVocationalCollege,Jinan250014，China)(ChinaUniversityo
4、fMiningandTechnology,Xuzhou,221008,China)Abstract:Inordertostudytheseismicresponseofdeck-typelongspanCFST(concretefilledsteeltube)archbridge,thedeck-typeCFSTarchbridge—ZhijingheGreatBridgewith430mspanwasanalyzedwithcomputationprogramANSYS,whichtheQiananseismicwav
5、eandEICentrowaveweretakenastheinputwaves.Theresultsshowthatmostvibrationsinthefirst10stepsareinthecrossdirectionofbridgewhichindicatesthatstiffnessinlengthwisedirectionofbridgeislargerthanthatincrossdirectionofbridge.Thesectionatarchspringingisthemostdangeroussec
6、tioninseismicresponsewhichhasthelargestseismicresponsememberforces.Althoughtheaxial-forceandmomentMzofarchribwithcross+verticaldirectionsinputseismicwavesarealittlelargerthanthosewithlengthwise+verticaldirectionsinputseismicwaves,themomentMywithcross+verticaldire
7、ctionsinputseismicwavesaremorelargerthanthosewithlengthwise+verticaldirectionsinputseismicwaves.Theaxial-forcesofinnerarchribatthemostdangeroussection—archspringingwithcross+verticaldirectionsinputseismicwavesarelargerthanthoseofoutarchrib.Keywords:bridgeengineer
8、ing;seismicresponseanalysis;ANSYS;deck-typeCFSTarchbridge;zhijingrivergreatbridge公路交通科技第卷0引言鋼管混凝土拱橋的首次應(yīng)用是1937年前蘇聯(lián)在列寧格勒用集束小直徑鋼管混凝土做拱肋建造了跨經(jīng)為110m的拱梁組合橋，自從1990年我國(guó)建
