3x13m预应力混凝土简支空心板梁桥计算书模板

WORD整理版参考学习资料南京工程学院毕业设计说明书作者：卞勋垒学号：214090640系部：建筑工程学院专业：土木工程题目：3X13m预应力混凝土简支空心板梁桥设计指导者：陈冬华讲师评阅者：臧华副教授2013年6月南京WORD整理版参考学习资料摘要预应力混凝土空心板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空心板桥，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，整体性好等多种优点，从而决定了本设计中桥型的选择，整个计算的方法。本设计采用装配式预应力简支梁结构，跨径组成为313m，其上部结构由主梁，桥面部分和支座等组成，主梁是桥梁的主要承重构件。桥面部分包括桥面铺装和栏杆等组成，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。下部由盖梁、桥墩等组成，共同支撑了整个下部结构。在设计中，桥梁上部结构的计算着重分析了桥梁在施工及使用过程中恒载以及活载的作用力，采用整体的自重荷载集度进行恒载内力的计算。按照新规范公路Ⅱ级车道荷载进行布置活载，并进行了梁的配筋计算，估算了钢绞线的各种预应力损失，并进行预应力阶段和使用阶段主梁截面的强度，正应力及主应力的验算。在设计中通过主梁荷载计算、内力计算、应力钢筋的布置、主梁截面强度与应力验算、支座等设计，完整地构造了一座装配式预应力混凝土简支梁桥，本设计主要计算主跨结构，边跨均以构造图进行设计。关键词：预应力，简支空心板梁，先张法WORD整理版参考学习资料Designofa3×13mprestressedconcretesimply-supportedhollowplategirderbridgeAbstractPrestressedconcretehollowslabbridgeinthebridgeconstructionofourcountryoccupiesmyimportantstatus,Atpresent,thepermanentbridgesforthemediumandsmallspan,Regardlessofisthehighwaybridgeorthebridgeinthecity,asfaraspossibletheuseofprestressedconcretehollowslabbridge,Becausethiskindofbridgehasobtainrawmateriallocally,theindustrializationconstruction,thedurabilityisgood,adaptabilityisstrong,hastheadvantagesofgoodintegrityetc.Todeterminethedesignofbridgetypeselection,thecalculationmethodof.Thisdesignusestheassemblytypeprestressedsimplysupportedbeamstructure,thespanofthebridgeis313m，Theupperstructureiscomposedofamainbeam,bridgefloorpartandthesupportandsoon,Thegirderisthemainbearingmemberofbridge.Bridgefloorpartcomposedofbridgedeckandrailings,Thesestructuresalthoughisnotthebridgemainbearingmembers,buttheirdesignandconstructionisdirectlyrelatedtothesafetyofthewholebridgefunctionandhereinthisdesignhasalsogivenadetaileddescriptionof.Inthedesign,calculationofthebridgeupperstructurefocusesontheanalysisoftheforceofbridgeintheconstructionanduseoftheprocessofconstantloadandliveload,thedeadloadthewholesetofconstantloadinternalforcecalculation.LayoutaccordingtothenewcodeforhighwaygradeIILaneloadliveload,Calculationandbeamreinforcement,lossofprestresssteelstrandwasestimated,andprestressedphaseandusephaseofthegirdersectionstrength,ischeckingcalculationofthestressandtheprincipalstress.WORD整理版参考学习资料Inthedesignofthemaingirderloadcalculation,internalforcecalculation,thestresssteelbararrangement,themainbeamintensityandstresscheckingcomputations,supporthedesignofthemaincalculationofmainspanstructure,thesidespanwithstructuralmapdesign.Keywords:prestressed,simplehollowboardbeam,pretensioningmethodWORD整理版参考学习资料目录前言..................................................................1第一章预应力混凝土简支空心板桥上部结构设计..........................21.1设计资料.......................................................21.2构造及尺寸选定.................................................21.3空心板毛截面几何特性计算.......................................41.3.1毛截面面积...............................................41.3.2毛截面重心位置...........................................41.3.3空心板毛截面对其重心轴的惯性矩...........................41.4作用效应计算...................................................61.4.1永久作用效应计算.........................................61.4.2可变作用效应计算.........................................71.4.3作用效应组合计算........................................161.5预应力钢筋数量估算及布置......................................191.5.1预应力钢筋数量的估算....................................191.5.2预应力钢筋的布置........................................211.5.3普通钢筋数量的估算及布置................................211.6换算截面几何特性计算..........................................231.6.1换算截面面积............................................241.6.2换算截面重心位置........................................241.6.3换算截面惯性矩..........................................251.7承载能力极限状态计算..........................................251.7.1跨中截面正截面抗弯承载力计算............................251.7.2斜截面抗剪承载力计算....................................261.8预应力损失计算................................................311.8.1锚具变形、回缩引起的应力损失............................311.8.2加热养护引起的温差损失..................................31WORD整理版参考学习资料1.8.3预应力钢绞线由于应力松弛引起的预应力损失................311.8.4混凝土弹性压缩损失引起的预应力损失......................321.8.5混凝土收缩、徐变引起的预应力损失........................331.8.6预应力损失组合..........................................351.9正常使用极限状态计算..........................................361.9.1正截面抗裂性验算........................................361.9.2斜截面抗裂性验算........................................411.10变形验算.....................................................461.10.1正常使用阶段的挠度验算.................................461.10.2预加应力引起的反拱度及预拱度的设置.....................471.11持久状态应力验算.............................................501.11.1跨中截面混凝土法向压应力kc验算........................501.11.2跨中截面预应力钢绞线拉应力p验算......................501.11.3斜截面主应力验算.......................................511.12短暂状态应力验算.............................................551.12.1跨中截面应力验算.......................................551.12.2L/4截面应力验算.......................................571.12.3支点截面应力验算.......................................581.13最小配筋率复核...............................................601.14铰缝计算................................................