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1、目录更多相关文档资源请访问http://www.docin.com/lzj781219完整CAD设计文件以及仿真建模文件，资料请联系68661508索要4×30m先简支后连续预应力混凝土梁桥设计摘要在本次桥梁设计中，根据地形地质条件和现有桥梁实例，依据工程设计规范提出了简支梁桥、连续梁桥、先简支后连续梁桥三种桥型的方案。按照“实用、经济、安全、美观”的桥梁设计原则，经过对优缺点的综合对比，最终选择预应力混凝土先简支后连续梁桥。当选定桥型后，接下来主要是上部结构设计，包括了桥梁总体布置及细部结构尺寸拟定、桥梁行车道板计算、主梁作用效应计算
2、、主梁作用效应组合、桥梁预应力钢束的估算与布置、横隔梁设计。其中利用了桥梁博士建立简易全桥模型，模拟全桥成桥和施工，完成钢束的估算和布置，并且计算钢束的各项预应力损失。当上部结构设计完成后，然后对下部结构进行设计。包括盖梁、桥墩等。计算内容包括内力计算、截面配筋设计与承载力的校核。先简支后连续桥梁的关键在于桥梁体系的转换，它不仅具有连续梁桥的优点，而且在施工上又具有简支梁的施工方法简单可行，便于桥梁的装配式施工。简单的说，就是运用简支梁的施工来建造连续梁桥。关键字：先简支后连续；预应力；钢筋束的布置；设计；验算；桥梁博士。IX目录IX目
3、录Prestressedconcretesimply-supportedtocontinuesbeambridgedesignAbstractInthedesignofthebridge,accordingtothetopographicandgeologicalconditions,andtheexistedbridgeasanexample,accordingtotheengineeringdesignspecificationpresentssimplesupportedbeambridge,continuousbeambridg
4、e,simply-supportedtocontinuousbeambridgethreebridgetypescheme.Accordingtothe"bridgedesignprinciplesforpractical,economic,safe,beautiful",afteracomprehensivecomparisonofadvantagesanddisadvantages,thefinalchoiceofprestressedconcretesimply-supportedtocontinuousbeambridge.Af
5、terselectedbridge,nextismainlyabouttheupperstructuredesign,includingthebridgelayoutanddetailstructuredimensions,bridgedeckcalculation,theeffectofcalculation,thecombinationofactioneffects,thebridgeofprestressedsteelbeamestimatesandlayout,crossbeamdesign.Theuseofthebridge,
6、theestablishmentoffullbridgemodel,simulationofbridgeandconstructionintofullbridge,completedestimationandlayoutofthesteelbeam,andthecalculationofprestressinglossofsteelbeam.Whentheupperstructuredesign,thencarriesonthedesigntothesubstructure.Includingthecapbeam,pier.Thecal
7、culationincludestheinternalforcecalculation,reinforcementdesignandstrengthcheck.Thekeytothesimplysupportedcontinuousbridgeliesintheconversionbridgesystem,itnotonlyhasthecontinuousbeambridgeisabit,butalsohassimpleconstructionmethodinconstructionissimpleandfeasible,conveni
8、entassemblyconstructionofbridge.Simplyput,istheuseofsimpleconstructionfortheconstructionofcontinuousbea
