第34卷第1期2012年2月工程抗震与加固改造EarthquakeResistantEngineeringandRetrofittingVol.34，No.1Feb．2012EarthquakeResistantEngineeringandRetrofittingFebruary2012［文章编号］1002-8412(2012)01-0082-07多种加固方法应用于双曲拱桥主拱圈的提载加固黄伟，申波，薛守宝，梁影(贵州大学空间结构研究中心，贵州贵阳550003)［提要］针对双曲拱桥的提载加固，基于贵州省安顺市木浪河大桥的检测结果，提出了在主拱圈的拱脚上缘增大截面、下缘增大截面改造为箱形断面，以提高拱脚抵抗负弯矩、正弯矩的承载能力;对其它截面采用拱背增大截面以提高抵抗负弯矩的承载能力，相应也提高了抵抗正弯矩的承载能力;对正弯矩承载能力不足的截面，采用粘贴钢板的加固方法。结果表明:采用这种提载加固的设计方法，达到了提高荷载等级的目的，同时方便施工，便于达到加固效果。［关键词］桥梁;双曲拱桥;主拱圈;提载加固［中图分类号］U448．22［文献标识码］AReinforcementforImprovingBearingCapacityofADoubleArchBridgeMainArchbyStrengthenMethodsHuangWei，ShenBo，XueShou-bao，LiangYing(ResearchCenterofSpaceStructures，GuizhouUniversity，Guiyang550003，China)Abstract:Inthispaper，reinforcementforimprovingthebearingcapacityofadoublearchbridgeisstudied．Basedonthetestresultsofadouble-archedbridgeofAnshuninGuizhouprovince，thestrengtheningprogramofthemainarchisproposed．Atthesectionofarchfeet，themomentbearingcapacityisimprovedbyenlargedupperedgeconcreteandloweredgeconcreteofthesection，thesectionischangedtoboxsection．Attheothersectionofthearch，thenegativemomentbearingcapacityisimprovedbyenlargedupperedgeconcreteofthesection，andthepositivemomentbearingcapacityisimproved．Forthedeficienciesofthepositivemomentbearingcapacity，thebondingsteelplateisrecommendedatthearchriboftheothersection．Theresultsshowthatthereinforcementmethodscanimproveloadlevelofthebridgeeffectively．Theconstructionofthebridgeisconvenientandcansatisfythedesigngoals．Keywords:bridge;doublearchbridge;mainarch;reinforcementforimprovingthebearingcapacityE-mail:gy-shenbo@sohu．com［收稿日期］2011-03-101引言双曲拱桥创建于20世纪60年代中期，是一种轻型拱式桥梁，也是传统桥型和现代施工工艺相...
