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页数:5页
时间:2019-05-22
《混合式桥面体系斜拉桥悬臂施工优化》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、桥梁建设2014年第44卷第4期(总第227期)BridgeConstruction,Vo1.44,No.4,2014(TotallyNo.227)l17文章编号:1003—4722(2014)04一O117—05混合式桥面体系斜拉桥悬臂施工优化戴宇文,王友元,何锦明。(1.华南理工大学,广东广州510640;2.中交四航工程研究院有限公司,广东广州510230;3.中交四航局第一工程有限公司,广东广州510500)摘要:为了降低混合式桥面体系斜拉桥的施工安全隐患,提高施工质量和效率,以贵广铁路北江特大桥混合式桥面体系的悬臂施工为例,采用MIDASCivi
2、l软件建立全桥有限元模型,对该桥对称悬臂施工方案进行计算分析,根据其分析结果提出先合龙后铺装桥面板的优化方案,并对优化方案进行计算分析。结果表明,在对称悬臂施工方法中桥塔位移过大,最大水平累计位移达12.5cm;而优化方案使桥塔位移基本控制在2cm左右,避免了桥塔位移过大引起施工安全隐患,使后续施工更有效率。关键词:铁路桥;斜拉桥;正交异性钢桥面体系;叠合梁桥面体系;悬臂施工;有限元法;施工优化;桥梁施工中图分类号:U448.27;U445.466文献标志码:AOptimizationofCantileverConstructionofCable—Stay
3、edBridgewithHybridDeckSystemDAIYu—wen~,WANGYou—yuan,HEdin—ming。(1.SouthChinaUniversityofTechnology,Guangzhou510640,China;2.EngineeringTechnologyResearchInstituteCo.,Ltd.,CCCCFourthHarborEngineeringCo.,Ltd.,Guangzhou510230,China;3.TheFirstEngineeringCo.,Ltd.,CCCCFourthHarborEnginee
4、ringCo.,Ltd.,Guangzhou510500,China)Abstract:Tominimizethecantileverconstructionsafetyriskandtoimprovetheconstructionqualityandefficiencyofthecable—stayedbridgewithhybriddecksystem,thecantileverconstruc—tionofthehybriddecksystemoftheBeijiangRiverBridgeonGuiyang—GuangzhouRailwaywast
5、akenasanexample。thesoftwareMIDASCivilwasusedtocreatethefiniteelementmodelforthewholebridgeofthebridgeandthesymmetriccantileverconstructionschemeforthebridgewascalculatedandanalyzed.Basedonthecalculationandanalysis,theoptimizedschemeofclos—ingthebridgefirstandlayingthedeckslabslate
6、wasproposedandtheoptimizedschemewasfur—thercalculatedandanalyzed.Theresultsofthecalculationandanalysisshowthatforthebridgeconstructedjustbythesymmetriccantileverconstructionmethod,thepylontophorizontaldis—placementistoogreatandthemaximumaccumulativedisplacementcanreach12.5cmwhileb
7、ytheoptimizedschemeasmentioned,thedisplacementiSbasicallycontrolledwithinabout2cm,thecantileverconstructionsafetyriskcausedbythetoogreatpylontopdisplacementisavoidedandthesuccessiveconstructionofthebridgeisthereforemoreefficient.Keywords:railwaybridge;cable—stayedbridge;orthotropi
8、csteeldecksystem;compositegirderd
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