140m下承式钢箱系杆叠拱桥受力特性分析

《140m下承式钢箱系杆叠拱桥受力特性分析》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、AbstractThetied—archbridgewithsteelboxhastheadvantagesofalargespanningcapacity,lowconstructionheight，andthebeautifulappearance．Ithasbeenwidelyusedincountrieswhichhavealreadybuilthigh．speedrailway．Butsuchbridgesarestillrareinthehigh—speedrailwaylineinChina．TheXinkaiheBridge，whichiso

2、nconstructioninHa-Dapassengerline，isa140mspanthroughtied—archstackwithsteelbox．111eupperandlowerarchesaremadeofparallelsteelboxwiththesamesectionoftwo．ribs；thetiedbeamiSmadeofconstantwidth．variableheightsteelboxsection；ThedeckiSacombinationofverticalandhorizontalsteelbeamandconcret

3、eslab．ThisbridgeisakeyprojectintheconstructionofHa．Dapassenger1ine．Inthispaper,mechanicalcharacteristicsofXinkaiheBridgeweresystematiclyanalyzedwithfiniteelementmethod．Thefollowingworkswerecompleted：1．FiniteelementmodelsofthisbridgewereestablishedbothbvpackageANSYSandⅦDAS．Thenthest

4、iffnessandstrengthofthebridgeareanalyzed．Underthecombinedactionofvariablyloads．t11edisplacementofthetiedbeam，girder1，andgirder2is10．1cm，10．5cm，and10．6cm；ThestressesofhangersarealiRlebigger,whichreach227．9Ⅳ口a，thestressoftheotherpartofthebridgeiSsmallthan150Ⅳ啤a．Theresultsshowthat：the

5、bridgeisinreasonablecondition．andthestiffnessandstrengthmeetdesignrequirements．2．Thestabilityofthebridgewascalculated．TheoverallstabilitywascalculatedbyMIDAS，whilethelocalstabilitywascalculatedbvANSYS．Theresultsshowthat：Thestabilityfactorofthebridgeisbig，theoverallstabilityfactorsa

6、rebiggerthan10．0，thelocalstabilityfactorsarebiggerthan8．08．3．Theroleofresistanceprovidedbyconcretebridgedecktothedeformationandstressstateofthebridgeinavarietyofloadswasstudied．Theresultsshowedthat：鼢entheresistanceprovidedbyconcretebridgedeckisnotconsidered，inthecombinedactionofdea

7、dload&ZKworsttwo—laneliveload&swingpower,theverticaldisplacementofthebridgeincreasedalittle；ThestressofcrossbeamincreasedbV3O％，thatthemaximumstressreached96．4Ⅳma．theincreaseofstressoftheotherpartsarelessthan5％．4．Theroleofsecondarybeamtothedeformationandstressstateofthebridgeinavari

8、etyofloadswasstudied．There