厦漳跨海大桥南汊主桥桥塔设计

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1、桥梁建设2013年第43卷第4期(总第22i期)BridgeConstruction，Vo1．43，No．4，2013(TotallyNo．221)33文章编号：1003—4722(2013)04—0033—06厦漳跨海大桥南汊主桥桥塔设计田文民，王江波，冯云成，牟宗军(中交第一公路勘察设计研究院有限公司，陕西西安710075)摘要：厦漳跨海大桥南汉主桥为主跨300m的双塔结合梁斜拉桥。对H形、钻石形、菱形和宝瓶形等塔形进行比选，最终确定该桥桥塔采用改进的H形钢筋混凝土桥塔(上塔柱竖直，中塔柱倾斜，下塔柱

2、外侧面竖直、内侧面倾斜)。桥塔塔柱采用矩形空心截面，在塔底设置高4．0m的实体段；钢锚梁采用开口箱形截面；塔柱横梁为全预应力混凝土结构，箱形截面；承台采用哑铃形截面；桥塔基础采用钻孔灌注桩群桩基础。为检验桥塔受力，对裸塔和全桥进行整体计算，并采用ANsYS和MIDAS分析桥塔关键部位局部受力。分析结果表明，桥塔各部位受力均满足规范要求，并有一定的安全储备。关键词：斜拉桥；桥塔；钢筋混凝土结构；钢锚梁；结构设计；受力分析；防腐设计；有限元法中图分类号：U443．38文献标志码：ADesignofPylons

3、ofSouthMainBridgeofXiazhangSea-CrossingBridgeT／ANWen—min，WANGJiangbo，FENGYun—cheng，MUZong-jun(CCCCFirstHighwayConsultantsCo．，Ltd．，Xian710075，China)Abstract：ThesouthmainbridgeoftheXiazhangSea—CrossingBridgeisadouble—pyloncorn—positegirdercable—stayedbridge

4、withamainspan300m．Inthedesignofthepylonsofthebridge，thepylonsoftheH—shape，diamondshape，geometricdiamondshapeandflowervaseshapewerecomparedanditwasfinallydeterminedthatthemodifiedH—shapereinforcedconcretepylons(theuppercolumnsofapylonwerevertical，themiddle

5、columnswereinclinedandtheoutersidesoftheIowercolumnswerevertica1whiletheinnersideswereinclined)shouldbeused．Thecolumnsoftheselectedpylonsaretherectangularhollowsectionsandatthefootingsofapylon，thesolidsectionsof4．0mheightareutilized．Thesteelanchorbeamsint

6、hepylonsaretheopenboxsections．Thecrossbeamsofthepylonsarethecompleteprestressedconcretestructuresofboxsections．Thepilecaponwhichapylonstandsisthedumbbellshapeandthefoundationisofthegroupboredpiles．Tochecktheforceconditionsofthepylonsofthebridge，theglobalc

7、alculationofthefreestandingpylonsandthewholebridgewasmadeandthelocalforceconditionsofthecriticalpartsofthepylonswereanalyzed，usingthesoftwareANSYSandMIDAS．Theresultsoftheanalysisindicatethattheforceconditionsofthedifferentpartsofthepylonscanmeettherelevan

8、trequirementsinthecodesandthepylonshavecertainsafetymargin．Keywords：cable—stayedbridge；pylon；reinforcedconcretestructure；steelanchorbeam；structuraldesign；forceconditionanalysis；corrosionprotectiondesign；finiteelemen