桃花峪黄河大桥吊杆主梁锚固区受力分析

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1、桥梁建设2014年第44卷第3期(总第226期)44BridgeConstruction，Vo1．44，No．3，2014(TotallyNo．226)文章编号：1003—4722(2014)03—0044—07桃花峪黄河大桥吊杆一主梁锚固区受力分析陈国红，宋晓莉(山东省交通规划设计院，山东济南250031)摘要：桃花峪黄河大桥主桥为主跨406m的大跨度钢箱梁自锚式悬索桥。该桥吊杆一主梁锚固区采用锚箱式锚固结构，由布置在钢箱梁腹板外侧的锚固板、承压板及加劲板等组成，板杆空间交错，受力复杂。为验证该桥锚固区受力的合理性，采用A

2、NSYS建立主梁空间节段有限元模型，对锚固区各板件的受力状况、锚固板件与箱梁外腹板焊缝受力特性及吊杆索力的扩散规律进行了分析，得到锚固区的受力特性。结果表明：吊杆索力通过锚头锚圈、垫板、,ik~le．、锚回板、主粱腹板传递扩散到整个钢箱梁断面；锚固区各板件应力均满足规范要求，结构受力合理且应力在各板件间传递流．畅关键词：自锚式悬索桥；吊杆一主梁锚固区；设计；受力分析；有限元法中图分类号：U448．25文献标志码：AForceConditionAnalysisofSuspenderandMainGirderAnchorageZ

3、onesofTaohuayuHuangheRiverBridgeCHENGuo—hong，SONGXiao-li(ShandongProvincialTransportPlanningandDesignInstitute，Jinan250031，China)Abstract：ThemainbridgeoftheTaohuayuHuangheRiverBridgeisalongsPanseif—an—choredsteelboxgirdersuspensionbridgewithamainspanof406m．Thesuspe

4、nderandmaingirderanchoragezonesofthebridgearethesteelanchorboxanchoragestructuresthatarecom—prisedoftheanchoringplates，bearingplatesandstiffeningplatesarrangedoutsidethewebsofthesteelboxgirder．Theplatesandmembersintheanchoragestructuresarespatia11ystaggeredandthefo

5、rceconditionsthereofarecomplicated．Toverifytherationalityoftheforceconditionsoftheanchoragezones，theANSYSwasusedtoestablishthespatialsectionalfiniteelementmod—elforthemaingirder．Theforceconditionsofvariousplatesoftheanchoragezones，theforcecharacteristicsOftheweldin

6、gseamsconnectingtheanchoringplatesandtheouterwebsofthesteelboxgirderandthespreadinglawofthesuspendercableforceswereanalyzedandtheforceconditionsoftheanchoragezoneswerehencegained．Theresultsoftheanalysisshowthatthesuspendercableforcestransferandspreadtothewholecross

7、sectionofthesteelboxgirderviatheanchorbands，paddingplates，bearingplates，anchoringplatesandthewebsofthemaingird—er．Thestressofthevariousplatesoftheanchoragezonescanmeettherelevantreauirementsinthecodes，theforceconditionsoftheanchoragestructuresarerationalandthetrans

8、ferofthestressfromplatetoplateissmooth．Keywords：self-anchoredsuspensionbridge；suspenderandmaingirderanchoragezone；de—sign；forceconditionanalysis；