基于Midas/civil的3×20公路钢筋混凝土T型截面简支梁桥设计Midas/civilbased3×20mhighwayreinforcedconcreteT-sectionsimplysupportedbeambridgedesign摘要桥梁是我们生活城市的重要组成部分,我所设计的是众多桥梁类型中的一种—简支梁桥,它在中小跨度梁桥中适用广泛,受力和结构简单,施工方便。围绕公路钢筋混凝土T型的简支梁桥,本次毕业设计的内容,是关于运用Midas/civil软件所开展的设计活动。在桥梁设计方案的选取方面,必须做到对于水文地质条件的充分考量。将Midas/civil的3×20作为重要基础的公路钢筋混凝土的T型截面简支梁桥的设计较为所确定的方案。其中,就重点而言,除了在有限元软件的辅助下,对桥梁机构在各种各样荷载组合之下的两个方面进行查看,设计之中对截面的尺寸还是实施了选择:其一为单元的应力和内力以及反力;其二为各个节点。除了依据相关规范实施了主梁的荷载的施加之外,对于这样的两种极限状态下的荷载,笔者依据相关的设计规范进行了桥梁方面的施加:其一为承载力;其二为正常使用。除了对于截面的几何特性值进行计算之外,还在对Midas/cicil软件充分利用的基础上,将结构的这些方面予以建立:一是支座;二是单元;三是节点;四是截面。另外,其中还包括调查研究,外文文献的查找和翻译。最后,在配筋方面,所依据的为桥梁的截面形式和弯矩组合的设计值。关键词:T型截面有限元模型主梁设计荷载组合截面配筋AbstractBridgeisanimportantpartofourcity,Idesignisoneofthemanybridgetypes-simplysupportedbeambridge,itiswidelyusedinsmallspanbeambridge,stressandstructureissimple,easytobuild.ThisgraduationprojectisaboutusingMidas/civilsoftwaretodesignhighwayreinforcedconcretet-beambridge.Accordingtothehydrogeologicalconditions,areasonablebridgedesignschemewasselected,andthefinalschemewasdeterminedtobethedesignof320highwayreinforcedconcretet-sectionsimplysupportedbeambridgebasedonMidas/civil.Includinginvestigationandresearch,foreignliteraturesearchandtranslation;Reasonableselectionofsectionsize;Midas/cicilsoftwarewasusedtoestablishthestructuralsection,nodes,elementsandsupports,calculatethegeometriccharacteristicvalueofthesection,andgeneratethefiniteelementmodelofthestructureintheformofbeamelement.Loadthemainbeamaccordingtothecode;Accordingtothedesignspecificationofhighwaybridge,loadisappliedonthebridgeunderthelimitstateofnormaluseandthelimitstateofbearingcapacity.Thefiniteelementsoftwareisruntocheckthereactionforce,internalforceandstressofeachnodeandunitofthebridgestructureundervariousloadcombinations.Finally,accordingtothecombineddesignvalueofbendingmomentandtheformofbridgesection,reasonablereinforcementiscarriedout.Keywords:t-sectionfiniteelementmodelmainbeamdesignloadcombinationsectionreinforcement目录第1章绪论.................................................................................................................................................51.1课题研究目的..................................................................................................................................51.2课题研究背景..................................................................................................................................51.2.1桥梁的现状和发展..............................................................................................................51.2.2桥梁的发展趋势..................................................................................................................71.3课题研究内容...........................................................................................................................