摘要预应力混凝土简支T字形梁桥由于外形简单、构造方便，目前在桥梁公路工程中应用广泛。本次毕业设计中，确定简支梁桥方案后，就其进行了结构设计。设计的主要内容有：拟定截面尺寸；计算截面内力及其相应的组合值；估算预应力钢筋的数量并对其进行布置；计算预应力损失值；主梁截面承载力与应力验算；主梁端部的局部承压验算；主梁变形验算；横隔梁计算；行车道板的计算；关键词：预应力；T形梁；简支梁桥；横隔梁；行车道板ABSTRACTPretestedconcreteTshapedgirderbridgesareofmanyadvantages.Theyhavesimpleoutlinesandcanbefabricatedeasily.BecauseoftheseadvantagesthePCTshapedgirderbridgearenowwidelyappliedinhighwaybridgeprojects.Intheprocessofthedesignmethodofthepaper.PosttensioningpretestedconcreteTshapedgirderischosenasthemaingirderofthebridge.Aftertheconfirmationofthetypeofthebridge,thedesignofthestructureisdone,includingconfirmingthesizeofcrosssection,calculatingthedesignforceofrestrainingsectionsandcombiningthemaccordingtothecriterion,estimatingtheamountofpretestedsteelsandarrangingthem,calculatingthegeometricaltraitsofcrosssectionsofgirdercalculatingthelossofpresses,checkingthecarryingcapacityofcrosssectionsandsoon.Keywords:Prestressed；T-shapedgirder；Diaphragms；Simplysupportedbeambridge；目录摘要.............................................................................................................................................2ABSTRACT.....................................................................................................................................31．前言...................................................................................................................................71.1预应力混凝土T型简支梁的特点及研究意义............................................................72．设计资料及构造布置............................................................................................................82.1桥梁跨径及桥宽...........................................................................................................82.2设计荷载.......................................................................................................................82.3材料及工艺...................................................................................................................83.横截面布置：.........................................................................................................................93.1主梁截面布置...............................................................................................................93.2主横截面沿跨长的变化............................................................................................123.3.横隔梁的设置............................................................................................................134.主梁作用效应计算................................................................................................................134.1永久作用效应计算.....................................................................................................134.1.1永久作用集度.................................................................................................134.1.2永久作用效应.................................................................................................154.2可变作用效应计算.................................................................................................
