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ID:37493858
大小:1.13 MB
页数:5页
时间:2019-05-24
《荆岳长江公路大桥索塔锚固钢锚梁结构体系分析》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2015年第45卷第2期(总第231期)BridgeConstruction,Vo1.45,No.2,2015(TotallyNo.231)89文章编号:1003—4722(2015)02—0089~05荆岳长江公路大桥索塔锚固钢锚梁结构体系分析张家元,丁望星,朱世峰(1.湖北省交通规划设计院,湖北武汉430051;2.中铁大桥局集团桥科院有限公司,湖北武汉430034)摘要:荆岳长江公路大桥主桥为主跨816m的双塔不对称混合梁斜拉桥,在成桥状态下,索塔锚固采用两端固定的钢锚梁结构体系。为研究钢锚梁
2、平衡斜拉索索力的作用,验证超静定结构体系铜锚梁的合理性,采用ANsYS软件建立索塔锚固区有限元模型,分析钢锚梁施工过程中2种不同的支承体系方案,并通过足尺模型试验研究钢锚梁对斜拉索索力的分配比例。结果表明:斜拉索初张时采用边跨固定、中跨滑动,斜拉索张拉后两端固定结构体系的钢锚梁承担了斜拉索索力水平分力的83.7,钢锚粱与塔壁对索力水平分力的分配比例为8:2,该体系能够发挥钢锚梁平衡斜拉索索力的作用,且结构可靠度高。关键词:斜拉桥;索塔锚固;钢锚粱;结构体系;有限元法;受力分析;模型试验中图分类号:U448.
3、27;U441文献标志码:AAnalysisofSteelAnchorBeamStructuralSystemofAnchorageinPylonofJingyueChangjiangRiverHighwayBridgeZHANGdia—yuan,DINGWang—xing,ZHUShi-feng。(1.HubeiProvincialTransportPlanningandDesignInstitute,Wuhan430051,China;2.BridgeScienceResearchInstituteLt
4、d.,ChinaRailwayMajorBridgeEngineeringGroup,Wuhan430034,China)Abstract:ThemainbridgeofJingyueChangjiangRiverHighwayBridgeisaasymmetricspanhybridgirdercable—stayedbridgewithdoublepylonsandwithamainspanof816m.Theanchor—ageinapylonofthebridgeincompletionstatei
5、softhesteelanchorbeamstructuralsystemwithitstwoendsbeingfixed.Tostudythefunctionoftheanchorbeambalancingthestaycableforcesandtoverifytherationalityoftheanchorbeamofthestaticallyindeterminatestructura1system.thesoftwareANSYSwasusedtosetupthefiniteelementmod
6、elfortheanchorageinthepylon,2differentsupportschemesadoptedforconstructionoftheanchorbeamwereanalyzedandthera—tiosofthestaycableforcesdistributedbytheanchorbeamwerestudiedbymeansofthefull—scalemodeltests.Theresultsofthestudyshowthattheanchorbeamusingthestr
7、ucturalsystemwithitssidespanendbeingfixed,itscentralspanendbeingslideatthetimeofinitialtensioningofthestaycablesandwithitstWOendsbeingfixedaftertensioningofthestaycablescanbear83.7horizontaIcomponentofthestaycableforcesandtheratioofthehorizontalcomponentdi
8、stributedbytheanchorbeamandpylonwallis8:2,provingthattheanchorbeamcanplaytheroleofbal—ancingthestaycableforcesandisalsostructurallyhighlyreliable.Keywords:cable—stayedbridge;anchorageinpylon;steelanchorbeam;s
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