桥梁上部结构毕业设计

**大学本科毕业设计I摘要随着时代的发展，交通建设逐渐成为地区经济发展的关键，而桥梁建设显得尤为突出。本文就一座T型简支梁的预应力混凝土桥梁为设计目的，从而探讨桥梁设计方面的一些知识与内容。本文主要设计**至**一级公路段上的一座分离式桥梁上部结构.桥长106.5米，由三跨组成，每跨长35.5米，单幅路宽为12米，两面设人行道。桥面铺装采用8cm沥青混凝土和15.5cm水泥混凝土；设计荷载为公路-I级。其中，桥梁上部结构设计包括结构尺寸的拟定，主梁设计，桥面板设计，横隔梁以及支座设计。主梁选定为预应力混凝土T型梁，混凝土采用C50，预应力钢束采用标准强度为1860Mpa的高强度钢绞线，支座则选用钢筋混凝土摆动式支座。主梁设计的主要内容有：荷载计算、荷载横向分布计算、内力影响线绘制；内力计算包括恒载内力、活载内力等；内力组合包括承载能力极限状态、正常使用极限状态；绘制内力图；截面强度计算包括破坏阶段截面强度和斜截面强度的计算等。横隔梁设计包括横隔梁荷载计算以及配筋等。行车道板设计由荷载计算，内力组合和钢筋配置组成。支座设计包括确定支座尺寸，进行支座配筋的工作。计算表明，各项验算符合要求，设计方案合理。关键词：预应力，混凝土，简支梁，上部结构设计**大学本科毕业设计IIAbstractAstimegoesby,trafficconstructionhasbecomethekeytoeconomicdevelopment.Especiallyinbridgeconstruction,whichisprominent.Inthispaper,IconstructaTtypesimplebeamofprestressedconcretebridge,soastoexploresomeknowledgeandcontentaboutthebridgedesign.Thedesignengineeringisaseparatebridgeonafirstclassroadfrom**to**.Thebridgeis106.5meterslong,composedofthree-span,andeachspan’slengthis35.5meters,singlelanefor12meters,besides,bothsidessetupthesidewalk.Thebridgedeckpavementismadeupof8cmasphaltconcreteandthe15.5cmcementconcrete;anddesignloadisforroad-Ilevel.Thebridgesuperstructuredesignincludestheformulationofstructuraldimensions,themainbeamdesign,thebridgedeckdesign,diaphragmbeamsandbearingdesign.OneconcreteofbridgesusingC50,astandardstrengthofprestressedsteelbeamhigh-strengthsteelstrandforthe1860Mpa,andbearingswingbearingtochoosereinforcedconcrete.Thedesignofthemaingirdercontentare:theloadcalculation,theloadtransversedistributioncalculation,internalforceinfluencelinedrawing;Internalforcecalculationincludesconstantloadinternalforce,liveloadinternalforce,etc.;Combinationofinternalforceofthecarryingcapacityofthelimitstate,includingnormaluselimitstate;Todrawinternal;Forsectionstrengthcalculationincludingdestructionduringsectionstrengthandinclinedsectionstrengthcalculation,etc.Crossthebeamdesignincludeshorizontalloadcalculationandthebeamreinforcement,etc.Carriagewayboarddesignincludestheloadcalculation,thecombinationofinternalforceandreinforcedconfiguration.Bearingdesignincludesdeterminesizebearings,makingtheworkofreinforcement.Calculationsshowthatthecheckingmeetstherequirements,sothedesignisreasonable.Keywords:prestressedconcrete,simplysupportedbeam,theupperstructuraldesign**大学本科毕业设计III目录第一章引言.............................................................1第二章基本资料...........................................................22.1设计资料............................................................22.2桥面布置............................................................22.3材料容重............................................................22.4设计荷载............................................................22.5工程地质、水文及气候资料............................................22.6方案比较与选定......................................................32.6.1梁式桥.....................................................................32.6.2刚架桥....................................................................32.6.3拱式桥....................................................................42.6.4方案选定...................................................................4第三章桥梁结构设计......................................................53.1拟定T型梁基本尺寸..................................................53.2横隔梁基本尺寸......................................................53.3桥面铺装............................................................5第四章行车道板结构设计..................................................64.1计算数据............................................................64.2自重内力计算........................................................64.2.1恒载内力...................................................................64.2.2恒载弯矩...................................................................64.2.3车辆轮载在板上的分布.......................................................64.3行车道板配筋及验算..................................................84.3.1行车道板的配筋............................................................84.3.2行车道板复核..............................................................94.3.3现浇湿接缝钢筋...........................................................10第五章主梁结构设计......................................................115.1设计资料...........................................................11**大学本科毕业设计IV5.1.1技术设计标准...................................................115.1.2材料...........................................................115.2主梁截面尺寸拟定...................................................115.2.1横截面布置...............................................................115.2.2截面几何特性.............................................................145.3主梁内力计算.......................................................185.3.1恒载内力及弯矩计算.......................................................185.3.2活载内力计算.............................................................215.3.3荷载的跨中作用效应计算....................................................265.3.4支点截面荷载最大剪力计算.................................................295.3.5主梁弯矩剪力组合.........................................................315.4钢筋面积的估算及钢束布置.......................