资源描述:
《预应力连续刚构桥毕业设计》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要摘要近几十年来,由于我国科学技术的进步,工业水平的提高,桥梁建筑技术得以讯速发展。千里江面的座座跨江大桥,现代高速公路迂回交叉的立交桥,高架桥和城市高架道路,以及更长的跨海湾,海峡大桥,城郊高速铁路与轻轨运输高架桥等,犹如一条条“彩虹”使得天堑变通途。并逐步建成立体交通网络,极大地改变了我国的交通状况,拉动了国民经济的发展,方便了广大人民群众的生活。在这些桥梁中不仅有华丽富贵的斜拉桥,气势雄伟的悬索桥,钢筋铁骨的钢桥,体形优美,历史悠久的拱桥,也有外表朴实却适应性强、施工方便、投资小、效益高
2、的刚架桥、连续--刚构桥.其中,预应力混凝土连续刚构桥以结构受力性能好、变形小、伸缩缝少、行车平顺舒适、造型简洁美观、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。随着预应力技术的发展和不断完善,尤其是悬臂等先进施工方法的出现,更使预应力混凝土连续刚构桥如虎添冀而活跃在整个桥梁工程领域,无论是城市桥梁、高速公路、山区高架桥,还是跨越江河湖滨大桥,预应力混凝土连续刚构桥都以它独特的魅力,而取代其他桥型成为优胜方案。另外,从国内外已建成的钢桥、钢筋混凝土及预应力混凝土连续梁体系的修建总
3、数来看,预应力混凝土连续梁刚构桥已远远超过半数,充分表现出预应力混凝土连续梁桥的强大生命力。同时,回顾一下预应力混凝土桥梁的发展历史也是十分必要,非常有益于展望今后的发展方向。关键词:连续刚构桥满堂支架预应力迈达斯1摘要Abstract:Inthelastseveraldecades,becauseoftheprogressoftechnologyandtheexaltationofindustrylevelinourcountry,Thetechniqueofbridgebuildinghav
4、ebeendevelopinginanamazingspeed.bridgesacrossthewiderivers,fly-overbridgesconnectingwiththemodenhighway,viaductandelevatedroadovercities,eventhelongerbridgesoverthechannelandarm,high-speedrailwaysintheoutskirtsofthecityandlightrailfortransportation,j
5、ustlooklikerainbowswhichmakethenaturalmoatturnintoaflatroad.inthesametime,thetrafficnetworkinprogresshaschangedsubstantiallythetansportationconditioninChina,Stimulatedthenationaleconomicgrowth,fittedthelifeoflargepeopleconveniencely.inthesebridges,th
6、erearenotonlythegorgeouscablestayedbridge,themajesticsuspensionbridge,thestrongsteelbridge,thebeautiful,richlyhistoriedarchbridge,butalsotherigidframebridgeandcontinuousrigidframebridgewhoseoutwardappearanceissimplebutgoodatadaptabilityandperformance
7、,whichmaketheconstructionconvenienceandtheinvestmentless.Aboveall,continuousrigidframebridgeofprestressedconcretebecomeoneofthemainpatternsofthemostcompetitionbridge,becauseoftheperfectstructurefunction,smallstrain,littleexpansionjoint,smoothcardrivi
8、ng,simpleandpleasingshape,littleengineeringmaintenanceandsuperiorityearthquake-resistant.alongwiththedevelopmentandimprovementofprestresstechnology,espaciallytheintroductionofthemodencantileverconstruction,continuousrigidframebridgeofprestressedconcr