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XXX毕业设计XXX届土木工程(道路桥梁方向)专业XXX班级题目濮阳市马颊河跨径33m双向六车道预应力混凝土简支T型梁桥设计姓名XXX学号XXX指导教师XXX职称XXX二零一七年五月二十日1本设计依据《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTGD—2004)与《公路桥涵设计设计通用规范》(JTGD—2004)进行桥梁上部结构设计与验算。某高速公路33m双向六车道简支T型梁设计,33m是标准跨径,采用分离式的截面。分离式预应力简支梁桥,按《公预规》进行桥面行车道设计必须有应急车道,车道宽按3.75设计,高速120/h,双向六车道,分两幅。对主梁即预应力混凝土简支梁桥进行永久效应计算,可变作用效应计算并进行效应组合,以此对主梁进行预应力钢筋的估算和布置。手算的内容:主梁截面几何特性的计算,计算预应力损失,验算主梁各个危险截面主拉应力和主压应力,荷载效应计算、配筋计算以及应力验算主要对行车道板和横隔梁。在算得数据后用桥梁博士进行全桥结构安全验算与预应力钢筋的计算,可以得到桥梁博士算得的数据,最后将手算和电算进行比较。通过手算与电算的比较可知桥梁的设计是可行的。计算书的数据主要是以手算的数据为主。关键词:T梁;预应力混凝土;A类构件;手算;Designofa33msixwaysimplesupportedTbeamforahighwayabstractThisdesignisbasedonthehighwayreinforcedconcreteandprestressedconcretebridgedesigncode(JTGD-2004)andhighwaybridgedesigngeneraldesignspecification(JTGD-2004)forthedesignandcalculationofthebridgesuperstructure.Ahighway33mtwo-waysixlanesimplysupportedTbeamdesign,33misthestandardspan,usingtheseparationofthecrosssection,thetransversedistributioncoefficientusingrigidconnectionmethod.accordingtothepublicpreregulationsforthedesignofthebridgedeckmusthaveemergencylane,accordingtothe3.75CheDaokuandesign,thespeedof120km/h,two-wayhighwaysixlanes,dividedintotwo.2Thisdesignismainlytothehandcount,namelyonthegirderprestressedconcretebeambridgepermanenteffectcalculation,variableeffectcalculationandeffectcombination。thegeometriccharacteristicsofthegirdersection,theprestresslosscalculation,checkingeachdangeroussectionofthemaingirdertensilestressandprincipalcompressivestress,Aftercalculatingthedatawiththebridgeforthewholebridgestructuresafetycheckandthecalculationofprestressedreinforcement,youcangetthedataofthebridgedoctor,andfinallyhandcalculationandcomputercomparison.Byhandcountingandelectricity.Thecomparisonshowsthatthedesignofthebridgeisfeasible.Thecalculationsofthedataismainlytohandcountdata.Keywords:Tbeam;prestressedconcrete;classacomponent;handcalculation;computercalculation3目录第一章设计资料及构造布置.....................................71.1设计资料.................................................71.1.1桥面跨径及桥宽净空....................................71.1.2设计荷载:............................................71.1.3材料及工艺:..........................................71.1.4设计依据..............................................71.1.5基本计算数据(见表1-1)..............................81.2横截面布置...............................................91.2.1主梁间距与主梁片数....................................91.2.2主梁跨中截面主要尺寸拟定.............................101.3横截面沿跨长变化........................................131.4横隔梁的设置.............................................14第二章主梁作用效应计算......................................142.1永久作用效应计算........................................142.1.1永久作用集度.........................................142.1.2永久作用效应.........................................162.2可变作用效应计算(修正刚性横梁法).......................172.2.1冲击系数和车道折减系数...............................172.2.2计算主梁的荷载横向分布系数............错误!未定义书签。2.2.4计算可变作用效应......................错误!未定义书签。42.3主梁作用效应组合........................................29第三章预应力钢束的估算及其布置..............................313.1跨中截面钢束的估算和确定..................错误!未定义书签。3.1.1按正常使用极限状态的应力要求估算钢束数.错误!未定义书签。3.1.2按承载能力极限状态估算钢束数.........................323.2预应力钢束布置..........................................333.2.1跨中截面及锚固端截面的钢束布置.......................333.2.2钢束起弯角和线形的确定...............................353.2.3钢束计算.............................................35第四章计算主梁截面几何特性..................................394.1截面面积及惯矩计算......................................394.1.1净截面几何特性计算...................................394.1.2换算截面几何特性计算.................................404.2截面静矩计算............................................424.3截面几何特性总汇........................................44第五章钢束预应力损失计算....................................455.1预应力钢束与管道壁之间的摩擦引起的应力损失...............465.2由锚具变形、钢束回缩引起的应力损失.......................475.3混凝土弹性压缩引起的预应力损失...........................505.4由钢束应力松弛引起的预应力损失...........................535.5混凝土收缩和徐变引起的预应力损失.........................5455.6预加内力计算及钢束预应力损失汇总.........................55第六章主梁截面承载力与应力验算..............................586.1持久状况承载能力极限状态承载力验算.......................586.1.1正截面承载力验算.....................................586.2持久状况正常使用极限状态抗裂验算.........................616.2.1正截面抗裂验算.......................................626.2.2斜截面抗裂验算.......................................636.3持久状况构件的应力验算...................................676.3.1正截面混凝土压应力验算...............................686.3.2预应力筋拉应力验算...................................696.3.3截面混凝土主压应力验算...............................716.4短暂状况构件的应力验算...................................756.4.1预加应力阶段的应力验算...............................766.4.2吊装应力验算.........................................77第七章主梁端部的局部承压验算................................797.1局部承压区的截面尺寸验算.................................797.2局部抗压承载力验算......................................81第八章主梁变形验算..........................................838.1计算由预加力引起的跨中反拱度.............................838.2计算由荷载引起的跨中挠度.................................878.3结构刚度验算............................................8768.4预拱度的设置...............................
本文标题:跨径33m简支梁桥设计毕业设计
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