变截面连续箱梁桥设计

本科毕业论文（设计）诚信声明本人郑重声明：所呈交的毕业论文（设计），题目《资江大桥设计（五）》是本人在指导教师的指导下，进行研究工作所取得的成果。对本文的研究作出重要贡献的个人和集体，均已在文章以明确方式注明。除此之外，本论文（设计）不包含任何其他个人或集体已经发表或撰写过的作品成果。本人完全意识到本声明应承担的责任。作者签名：日期：年月日湖南工业大学本科毕业设计（论文）I摘要本设计题目为资江大桥（五）预应力混凝土连续梁桥，本项目位于益阳市资阳区和赫山区境内，线路全长2547.8m，其中大桥桥长550m，桥头接线长752.18m，另外在大桥资阳岸设匝道桥一座，长185.24m。单向三车道，上部结构采用先简支后连续的预应力混凝土连续箱型梁桥。简支转连续是桥梁施工中较为常见的一种方法,该施工方法的主要特点是施工方法简单可行，施工质量可靠，实现了桥梁施工的工厂化、标准化和装配化。目前随着高等公路的发展，为改善桥梁行车的舒适性，简支转连续梁桥在中、小跨径的连续梁桥中得到了广泛地应用。随着社会的发展，建立起更加发达、快捷、便利的交通网络成为了影响区域经济发展的重要因素。上世纪60年代至今，由于科学技术的发展，现代工业制造水平的提高，对桥梁建造提出了越来越高的要求，通过一代又一代的土木人的辛勤奋斗，高速公路上循环交叉的立交桥，高架桥，长达几十公里的跨海大桥，新发展的城郊高速公路，铁路桥与轻轨运输高架桥等。这些桥梁犹如一条横跨江海上的“彩带”，将我们的世界装扮的愈发多姿多彩。纵观世界各国的大城市，常以工程雄伟的大桥作为城市的标志与骄傲。桥梁建筑已不仅仅是一种交通出行的要求，而且作为一种结构艺术的形式，存在于我们的生活中。梁桥体系桥梁是一种非常古老而实用的桥型。梁作为承重结构，是以它的抗弯能力来承受荷载的，梁分简支梁、悬臂梁、固端梁和连续梁等，悬臂梁，固端梁和连续梁都是利用支座上的卸载弯矩去减少跨中弯矩使梁跨内的内力分配更合理，以同等抗弯能力的构件断面就可建成重大跨径的桥梁。预应力混凝土梁氏体系的桥梁应用甚广，简支梁的最大跨径已经达到78m，连续梁的最大跨径接近200m。关键词：连续梁；悬臂施工；预应力；弯矩；极限状态资江大桥设计（五）IIAbstractThisdesigntopicfortheziriverbridgeofprestressedconcretecontinuousgirderbridge,(5)withintheterritoryoftheprojectislocatedinziyangdistrictandgumingyiyangcitydistrict,linelengthof2547.8m,1518.6mlong,includingbridgebridgeconnection752.18mlong,theotheratabridgefromtheshorearampbridge,185.24mlong.One-waythreelanes,theupperstructureUSESthefirstafterthesimplysupportedcontinuousprestressedconcretecontinuousboxgirderbridge.Inturnsimplysupportedcontinuousbridgeconstructionisoneofthemorecommonmethod,themaincharacteristicsoftheconstructionmethodissimpleandfeasibleconstructionmethods,constructionqualityandreliable,andhasrealizedthebridgeconstructionoffactory,standardization,andassembly.Atpresent,alongwiththedevelopmentofthehigherroadbridgeinordertoimprovethedrivingcomfort,turnsimplysupportedcontinuousbeambridgeinmediumandsmallspancontinuousgirderbridgehasbeenwidelyused.Withthedevelopmentofthesociety,toestablishamoredeveloped,fastandconvenienttransportnetworkhasbecometheimportantfactorsthataffectregionaleconomicdevelopment.Sincethe1960s,duetothedevelopmentofscienceandtechnology,theimprovementofmodernindustrialmanufacturing,thebridgebuildinghigherandhigherdemandsareproposed,bygenerationaftergenerationofcivilpeopleofhardstruggle,circularcrosshighwayoverpass,theviaduct,dozensofkilometerslongcross-seabridge,thenewdevelopmentofsuburbanhighway,railwayandlightrailtransitviaduct.Thebridgeislikearibbonacrosstheocean,willdressupourworldmorecolorful.Bigcitiesthroughouttheworld,ofteninengineeringgrandbridgeasasymbolofcityandpride.Bridgeconstructionisnotonlyisakindoftransportationdemand,andasakindofstructureformofart,existinourlife.Thebridgegirderbridgesystemisaveryoldandpracticalbridge.Beamassupportingstructure,tobeabletowithstandtheload,itsbendingbeamsimplysupportedbeamandcantileverbeam,fixedendbeamandcontinuousbeam,cantileverbeam,thefixedendbeamandcontinuousbeamareusingunloadingonthebearingbendingmomenttoreducebendingmomentinthespanoftheinternalforcedistributioninthebeamspanmorereasonable,atthesamesectionflexuralcapacityofcomponentscanbebuiltwithbigspanBridges.Prestressed湖南工业大学本科毕业设计（论文）IIIconcretebridgeofkissingthesystemapplication,thebiggestspanbeamhasreached78m,thebiggestspancontinuousbeamiscloseto200m.Keywords:Thecontinuousbeam;：Thecontinuousbeam;Thecantileverconstruction;Prestressed;Bendingmoment;Limitstate.资江大桥设计（五）IV目录摘要.......................................................................................................................IAbstract................................................................................................................II第1章绪论........................................................................................................11.1工程概况.................................................................................................11.2技术标准和设计参数.............................................................................11.3主要设计规范.........................................................................................21.4地质条件.................................................................................................2第2章方案比选................................................................................................32.1方案..........................................................................................................32.2方案比选依据..........................................................................................4第3章桥梁纵向分孔及横截面尺寸拟定........................................................63.1桥梁纵向分孔..........................................................................................63.2桥横截面尺寸拟定..................................................................................63.3箱型截面尺寸的拟定..............................................................................7第4章桥面板计算..........................................................................................114.1悬臂板内力计算....................................................................................114.2中间板内力计算....................................................................................12第5