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山东交通学院2016届毕业生毕业论文（设计）题目：临河桥施工图设计-5×13m预应力混凝土简支空心板桥施工图设计院别交通土建工程学院专业土木工程班级土木121学号120711113姓名褚鹏飞指导教师邢德进二○一六年六月山东交通学院毕业设计1摘要本次毕业设计课题是5×13米预应力简支空心板桥施工图设计。预应力混凝土空心板梁桥以结构受力性能好、变形小、伸缩缝少、行车平顺舒适、养护工程量小、抗震能力强等而成为最富有竞争力的主要桥型之一。设计桥梁跨度为5×13m，桥面宽20m。计算过程大致如下。首先，确定主梁主要构造及细部尺寸，它必须与桥梁的规定和施工保持一致，考虑到抗弯刚度及抗扭刚度的影响，设计空心板梁。其次，利用结构设计原理的知识求解分析结构总的内力(包括恒载和活载的内力计算)。用于计算的内力组合结果从而估算出纵向预应力筋的数目，然后再布置预应力钢丝束。再次，计算预应力损失。然后，进一步进行截面强度的验算，其中包括承载能力极限状态和正常使用极限状态。在正常使用极限状态验算中包括计算截面的混凝土法向应力验算、预应力钢筋中的拉应力验算、截面的主应力计算。必须通过多次验算才能得到理想结果，经过多次调节各号钢束的编束根数与束数以及加配普通钢筋，最终使得结构安全验算合格。关键词：预应力混凝土，简支空心板，内力组合2ABSTRACTMygraduatedesignissueistheconstructiondesignforsimplysupportedhollowslabbridge(5×13m)meter.Prestressedconcretehollowslabbeambridgestructureperformance,smalldeformation,atelescopicseamless,smoothdrivingcomfort,smallamountofmaintenanceengineering,seismicabilitystrongandbecomethemostcompetitiveoneofthemainbridge.Thebridgespanis5×13m,andthebridgedeckis20m.Firstly,Determinethemainstructureanddetailsizeofthemaingirder,anditmustbeconsistentwiththeprovisionsofthebridgeandtheconstruction,consideringtheinfluenceofbendingrigidityandtorsionalrigidity,designthehollowslabbeam.Secondly,theinternalforceofthestructureisanalyzedbyusingtheknowledgeofstructuredesignprinciple(includingtheinternalforcecalculationofdeadloadandliveload).Theresultsoftheinternalforcecombinationareusedtoestimatethenumberofthelongitudinalprestressingtendons,andthentheprestressedwirebundleisarranged.Moreover,calculationofprestressloss.Then,thecheckingcalculationofthesectionstrengthiscarriedout,includingtheultimatestateofbearingcapacityandthelimitstateofnormaluse.Innormaluselimitstatecheckingcalculationincludingthecalculationsectionofconcretenormalstresscheckingcalculationoftensilestressinprestressedbarandthemainstressofsection.Afterseveraladjustmentsofthesteelbeam，thebeamforthenumbersincreasewiththebeamandwithafewordinarysteel，youcanmakeCheckingthestructuralsafetyqualified.Keywords:Prestressedconcrete，Simplysupportedhollowslabbridge，Combinationofinternalforces目录摘要....................................................................1ABSTRACT..................................................................2前言.....................................................................11计算依据与基础资料......................................................21.1标准...............................................................21.2主要材料..........................................................21.3设计要点..........................................................22方案比选................................................................32.1方案编制...........................................................32.2方案比较...........................................................33上部结构的计算..........................................................53.1横断面布置.........................................................53.2内力计算..........................................................73.2.1永久荷载作用计算：...............................................73.2.2可变效应作用计算.................................................83.2.3支点横向分布系数：..............................................143.2.4支点到4l处的荷载横向分布系数...................................154可变效应计算...........................................................164.1车道荷载效应......................................................184.2人群荷载效应......................................................195作用效应组合...........................................................206全预应力混凝土梁配筋设计...............................................226.1预应力钢筋数量的估算..............................................226.2预应力钢筋的布置..................................................236.3普通钢筋数量的估算及布置................................................236.4承载能力极限状态计算....................................................256.4.1跨中截面正截面抗弯承载能力计算...............................256.4.2斜截面抗剪承载力计算...............................................266.5预应力损失计算....................................................296.6正常使用极限状态计算..............................................346.6.1正截面抗裂性验算....................................................346.6.2斜截面抗裂性验算....................................................386.7变形计算..........................................................416.7.1正常使用阶段的挠度计算.............................................416.7.2预加应力引起的反拱度计算...........................................426.7.3预拱度的设置........................................................436.8应力验算..........................................................446.8.1持久状态应力验算....................................................446.8.2短暂状态应力验算....................................................467最小配筋率复核.........................................................508栏杆计算...............................................................51褚鹏飞：5×13m预应力混凝土简支空心板桥施工图设计8.1栏杆的构造及布置..................................................518.2栏杆柱的作用效应计算..............................................519扶手计算........................................................................5510板式橡胶支座..........................................................5711下部结构