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1、41軌道交通學(xué)院畢業(yè)設(shè)計(jì)(論文)題目:高速鐵路70m+120m+70m連續(xù)梁橋設(shè)計(jì)專業(yè)土木工程(軌道工程)班級(jí)學(xué)號(hào)姓名指導(dǎo)教師2014年5月25日41高速鐵路70m+120m+70m連續(xù)梁橋設(shè)計(jì)摘要:20世紀(jì)90年代以來(lái),中國(guó)的高速鐵路取得了長(zhǎng)足進(jìn)步,為經(jīng)濟(jì)建設(shè)作出了重要貢獻(xiàn)。橋梁作為高速鐵路的重要組成部分,在鐵路交通運(yùn)輸中起著不可替代的作用。連續(xù)梁橋是常用的一種橋梁結(jié)構(gòu),預(yù)應(yīng)力混凝土連續(xù)梁橋是其主要結(jié)構(gòu)形式,它具有接縫少、可以減小梁高,節(jié)省材料,且剛度大,整體性好,超載能力大,安全度大,橋面伸縮縫大,行車舒適
2、等優(yōu)點(diǎn)。本設(shè)計(jì)依據(jù)任務(wù)書要求,采用單箱單室截面形式,通過(guò)midas軟件進(jìn)行設(shè)計(jì),根據(jù)橋梁的尺寸擬定建立橋梁基本模型,然后進(jìn)行內(nèi)力分析,計(jì)算配筋結(jié)果,進(jìn)行截面驗(yàn)算。本文詳細(xì)介紹了70m+120m+70m連續(xù)梁橋設(shè)計(jì)的截面尺寸擬定、橋梁模型建立、荷載施加、截面配筋和橋梁截面驗(yàn)算等過(guò)程,經(jīng)過(guò)分析驗(yàn)算表明該設(shè)計(jì)計(jì)算方法正確,內(nèi)力分布合理,符合設(shè)計(jì)任務(wù)的要求。關(guān)鍵詞:高速鐵路;連續(xù)梁橋;結(jié)構(gòu)分析;過(guò)程驗(yàn)算Thedesignofahigh-speedrailwaycontinuousgirderbridgewiththem
3、ainspansof(70+120+70)mAbstract:Sincethe1990s,China'shigh-speedrailwayhasmadeconsiderableprogress,madeasignificantcontributiontoeconomicdevelopment.Asanimportantpartofhigh-speedrailway,bridgeplaysanirreplaceableroleintherailtransport.Continuousgirderbridgeisa
4、commonbridgestructure,pre-stressedconcretecontinuousgirderbridgeisitsmainstructureform,ithasadvantagesoffewerseams,highbeamcanbereduced,savingmaterialandstiffness,goodintegrity,highoverloadcapacity,safetydegree,largedeckjoints,drivingcomfort,etc.Thedesignbas
5、isrequirementsofthemissionstatement,usingcross-sectionintheformofsingle-chambersinglebox,designedbymidassoftware.Accordingtothesizeofthebridgeintendedtoestablishthebasicmodelofthebridge,andthentheinternalforceanalysis,calculationresultsofreinforcement,conduc
6、tedacross-sectionalchecking.Thispaperdescribesthe70m+120m+70m-sectionaldimensionsoftheproposedcontinuousgirderbridgedesign,bridgemodel,theappliedload,andbridgereinforcementsectionsectionoftheprocessof41checking,etc.,throughtheanalysisofcheckingdesigncalculat
7、ionsshowthatthemethodiscorrect,rationaldistributionofinternalforces,inlinewithrequirementsofthedesigntask.Keywords:high-speedrailway;continuousgirderbridge;structuralanalysis;checkingprocess41目錄1概述51.1連續(xù)梁橋特點(diǎn)51.1.1連續(xù)梁橋與簡(jiǎn)支梁橋和懸臂梁橋相比具有以下特征51.2預(yù)應(yīng)力混凝土結(jié)構(gòu)51.2.1預(yù)應(yīng)力混凝
8、土結(jié)構(gòu)基本原理61.2.2預(yù)應(yīng)力結(jié)構(gòu)特點(diǎn)61.2.3預(yù)應(yīng)力施加方法61.3設(shè)計(jì)特點(diǎn)71.4施工工藝71.5Midas軟件介紹81.6小結(jié)82橋跨整體設(shè)計(jì)和局部尺寸92.1設(shè)計(jì)基本資料92.1.1橋面跨徑及橋?qū)?2.1.2設(shè)計(jì)荷載92.1.3材料及工藝92.1.4設(shè)計(jì)依據(jù)102.1.5基本設(shè)計(jì)數(shù)據(jù)102.2主梁結(jié)構(gòu)設(shè)計(jì)102.2.1截面尺寸擬定112.3小結(jié)123荷載內(nèi)力計(jì)算133.1單