刚架拱桥旧桥加固方案论证分析.pdfVIP

2023年第6期黑龙江交通科技No.6,2023

(总第352期)HEILONGJIANGJIAOTONGKEJI(SumNo.352)

刚架拱桥旧桥加固方案论证分析

李油油,张鸿志

(河南省交通规划设计研究院股份有限公司,河南郑州451450)

摘要:现役刚架拱桥因其结构安全系数低、整体刚度差、横向联系弱等缺点,导致主要受力构件易出现结构性病害,危及桥梁

结构安全。综合考虑桥梁结构设计安全等级、施工方便性、经济性及交通量情况,同时采用粘贴钢板方案与减轻上部活荷载方

案对桥梁进行加固改造。通过利用有限元软件midascivil,对刚架拱桥加固前、后的受力状态进行分析。结果表明:该方案加固

效果较为显著,可以明显减小桥梁跨中竖向位移,提升桥梁承载力安全系数,改善各构件受力状态,保障桥梁安全运营。

关键词:刚架拱桥;加固;粘贴钢板;病害分析

中图分类号:U445文献标识码:A文章编号:1008-3383(2023)06-0085-03

DemonstrationandAnalysisofReinforcementSchemeofOldRigidFrameArchBridge

LIYou-you,ZHANGHong-zhi

(HenanCommunicationsPlanningDesignInstituteCo.,Ltd.,Zhengzhou,Hennan451450,China)

Abstract:Inservicerigidframearchbridgesarepronetostructuraldiseasesandendangerthesafetyofbridgestructuresbecauseof

theirlowstructuralsafetyfactor,pooroverallstiffnessandweaktransverseconnection.Consideringthedesignsafetylevel,construction

convenience,economyandtrafficvolumeofthebridgestructure,theschemeofpastingsteelplateandtheschemeofreducingtheupper

liveloadareadoptedtostrengthenthebridge.Thestressstateofrigidframearchbridgebeforeandafterreinforcementisanalyzedby

usingthefiniteelementsoftwaremidascivil.Theresultsshowthatthereinforcementeffectofthisschemeissignificant,whichcansig-

nificantlyreducetheverticaldisplacementinthemiddleofthebridgespan,improvethesafetyfactorofbridgebearingcapacity,im-

provethestressstateofeachcomponent,andensurethesafeoperationofthebridge.

Keywords:rigidframearchbridge;reinforce;pastesteelplate;diseaseanalysis

根据在荷载作用下主梁的轴力、弯矩、剪力、位

1桥梁概况

移