池州长江公路大桥主桥桥塔上横梁锚固结构设计.pdf

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1、桥梁建设２０１７年第４７卷第２期（总第２４３期）BridgeConstruction，Vol．４７，No．２，２０１７（TotallyNo．２４３）８３文章编号：１００３－４７２２（２０１７）０２－００８３－０６池州长江公路大桥主桥桥塔上横梁锚固结构设计文坡，张强，石建华（中铁大桥勘测设计院集团有限公司，湖北武汉４３００５６）摘要：池州长江公路大桥主桥为主跨８２８m的双塔双索面单侧混合梁斜拉桥。桥塔上塔柱设置６道钢结构上横梁，上横梁均采用箱形断面，竖向中心距均为１３．５m。单个钢横梁长７m、宽５．５m、高７m，划分为４个块段，各块段间采用M３０高强度螺栓进行拼接。斜拉索分组锚固于各道钢横梁

2、横隔板之间的锚固构造内，形成索塔体外锚固体系。钢横梁端部与桥塔上塔柱接触位置设置预埋钢板，通过高强度螺杆及剪力钉将钢横梁与混凝土上塔柱牢固连接。每道钢横梁外部设置封闭钢珠结构。采用有限元软件对桥塔上横梁锚固结构进行受力分析，结果表明结构受力均满足规范要求。关键词：斜拉桥；桥塔；钢横梁；索塔锚固；连接构造；钢珠结构；结构设计；有限元法中图分类号：U４４８．２７；U４４２．５文献标志码：ADesignofAnchorageStructuresforUpperCrossBeamsonPylonofMainBridgeofChizhouChangjiangRiverHighwayBridgeWEN

3、Po，ZHANGQiang，SHIJianhua‐（ChinaRailwayMajorBridgeReconnaissance&DesignInstituteCo．，Ltd．，Wuhan４３００５６，China）Abstract：ThemainbridgeofChizhouChangjiangRiverHighwayBridgeisaone‐sidehybridgirdercable‐stayedbridgewithdoublepylons，doublecableplanesandwithamainspanof８２８m．Ontheuppercolumnsofapylon，６steelupp

4、ercrossbeamsarearranged．Thesectionsofthecrossbeamsarealltheboxsectionsandtheverticalc／cdistancesofthecrossbeamsare１３．５m．Thelengthofacrossbeamis７m，thewidthis５．５mandthedepthis７m．Thecrossbeamisdividedinto４segmentsandthesegmentsaresplicedbytheM３０high‐strengthbolts．Thestaycablesareanchoredingroupinthea

5、nchoragestructuresarrangedbetweenthediaphragmsofeachcrossbeamandconsequentlytheanchoragesystemsoutsidethepylonareformed．Atthepositionswheretheendsofacrossbeamcontactwiththeupperpyloncolumns，thepre‐embeddedsteelplatesarear‐rangedandthesteelcrossbeamandtheconcreteupperpyloncolumnsarefirmlyconnectedb

6、ythehigh‐strengthboltstemsandshearstuds．Ontheoutsideofeachcrossbeam，theclosedsteelballstructureisalsoarranged．Thefiniteelementsoftwareisusedtocarryouttheforceconditionanal‐ysisoftheanchoragestructuresforalltheuppercrossbeamsandtheresultsoftheanalysisdemon‐stratethatthestructuralforceconditionscans

7、atisfytherelevantrequirementsinthecodes．Keywords：cable‐stayedbridge；pylon；steelcrossbeam；anchorageinpylon；connectingstructure；steelballstructure；structuraldesign；finiteelementmethod1概述干线公路的重要组成部分。该桥位于长江下游安池州长江公路大