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1山东交通学院2015届毕业生毕业设计设计书题目：滨德高速4×30m装配式预应力混凝土简支T梁桥施工图设计专业：土木工程班级：土木学号：姓名：指导教师：完成日期：2015年6月王腾飞：滨徳高速4×30装配式预应力混凝土简支T梁桥施工图设计2摘要预应力混凝土梁式桥在我国桥梁建筑上占我重要的地位，在目前，对于中小跨径的永久性桥梁，无论是公路桥梁或者城市桥梁，都在尽量采用预应力混凝土梁式桥，因为这种桥梁具有就地取材，工业化施工，耐久性好，适应性强，整体性好以及美观等多种优点。本设计采用装配式简支T梁结构，其上部结构由主梁、横隔梁、行车道板，桥面部分和支座等组成，显然主梁是桥梁的主要承重构件。其主梁通过横梁和行车道板连接成为整体，使车辆荷载在各主梁之间有良好的横向分布。桥面部分包括桥面铺装、伸缩装置和栏杆等组成，这些构造虽然不是桥梁的主要承重构件，但它们的设计与施工直接关系到桥梁整体的功能与安全，这里在本设计中也给予了详细的说明。本设计主要受跨中正弯矩的控制，当跨径增大时，跨中由恒载和活载产生的弯矩将急剧增加，是材料的强度大部分为结构重力所消耗，因而限制的起跨越能力，本设计采用27m标准跨径，合理地解决了这一问题。在设计中通过主梁内力计算、应力钢筋的布置、主梁截面强度与应力验算、行车道板及支座、墩台等等设计，完美地构造了一座装配式预应力混凝土简支T梁桥，所验算完全符合要求，所用方法均与新规范相对应。本设计重点突出了预应力在桥梁中的应用，这也正体现了我国桥梁的发展趋势。关键词：预应力，简支T梁，后张法，应力验算3AbstractTheprestressedconcretebeamplatebridgeoccupiesmyimportantstatusinourbridgeconstruction,inatpresent,regardingsmallspanpermanentbridge,regardlessofisthehighwaybridgeorthecitybridge,allasfaraspossibleisusingtheprestressedconcretebeamplatebridge,becausethiskindofbridgehasmakesuseoflocalmaterials,theindustrializationconstruction,thedurabilityisgood,compatible,integritygoodaswellasartisticandsoonmanykindsofmerits.ThisdesignusesassemblytypesimplesupportTbeamstructure,itssuperstructurebythekingpost,septumtransversumbeam,thelaneboard,thebridgefloorpartandthesupportandsooniscomposed,theobviouskingpostisthebridgemaincarrier.Itskingpostconnectsintothewholethroughthecrossbeamandthelaneboard,enablethevehiclesloadtohavethegoodtraversebetweenvariouskingposts.Bridgefloorpartincludingcompositionsandsoonflooring,expansionandcontractioninstallmentandparapet,thesestructuresalthoughisnotthebridgemaincarrier,buttheirdesignandtheconstructionrelatesthebridgewholedirectlythefunctionandthesecurity,herehasalsogiventhedetailedexplanationinthisdesign.Thisdesignmainlystepsthesaggingmomentcontrol,whenthespanincreases,crossthebendingmomentwhichproducesbythedeadloadandtheliveloadthesharpgrowth,isthematerialintensitymajorityofconsumesforthestructuregravity,thuslimitsthespanningability,thisdesignusesthe27mstandardspan,hassolvedthisproblemreasonably.Inthedesignthroughthekingpostendogenicforcecomputation,thestresssteelbararrangement,kingpostsectionintensityandstresscheckingcalculation,laneboardandsupport,pillarTaiwanandsoondesigns,astructureassemblytypeprestressedconcretesimplesupportTbeambridge,thecheckingcalculationcompletelyhasconformedtotherequirementperfectly,usesthemethodandthenewstandardcorresponds.Thisdesignhashighlightedthepre-stressedwithemphasisinthebridgeapplication,thishasalsobeenmanifestingourcountrybridgetrendofdevelopment.Keyword:Pre-stressed，SimplesupportTbeam，Tensioning，Stresscheckingcalculation王腾飞：滨徳高速4×30装配式预应力混凝土简支T梁桥施工图设计4目录前言......................................................................1第1章.桥梁设计基本资料..................................................11.1滨德高速K72+943.5中桥工程地质资料...................................11.1.1气候条件.........................................................11.1.2地质资料............................................................21.2设计规范..............................................................3第2章桥型设计方案....................................................52.1方案一：预应力钢筋混凝土简支梁（锥型锚具）.............................52.1.1基本构造布置........................................................52.1.2设计荷载............................................................52.2方案二：钢筋混凝土箱形拱桥...........................................62.2.1方案简介............................................................62.2.2尺寸拟定........................................................62.2.3桥面铺装及纵横坡度..................................................72.2.4施工方法........................................................72.2.5总结...............................................................7第3章上部结构设计.....................................................83.1设计资料及结构布置..................................................83.1.1设计资料............................................................83.1.2横截面布置.........................................................83.1.3横截面沿跨长变化.................................................113.1.4横隔梁的布置....................................................113.2主梁作用效应计算.....................................................113.2.1恒载内力计算....................................................113.2.2活载内力计算....................................................133.2.3计算横向分布系数.................................................133.2.4计算最大弯矩和最大剪力..........................................173.2.5主梁效应作用组合...................................................213.3钢筋面积的估算及钢束布置..........................................213.3.1受压翼缘有效宽度b'f的计算.........................................213.4钢束预应力损失估算.................................................303.4.1预应力钢筋与管道间摩擦引起的预应力损失σl1........................303.4.2锚具变形、钢丝回缩引起的应力损失σl2................................303.4.3预应力钢筋分批张拉时混凝土弹性压缩引起的应力损失σl4...............323.4.4钢筋松弛引起的预应力损失σl5.......................................323.4.5混凝土收缩、徐变引起的损失σl6.....................................323.5应力验算...........................................................3553.5.1短暂状况的正应力验算......