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ID:36499857
大小:1.26 MB
页数:6页
时间:2019-05-11
《厦漳跨海大桥南汊主桥桥塔设计》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
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
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