PC连续刚构桥施工阶段受力分析

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1、西南交通大学硕士学位论文PC连续刚构桥施工阶段受力分析姓名：屈健申请学位级别：硕士专业：桥梁与隧道工程指导教师：赵人达20070601西南交通大学硕士研究生学位论文第lI页Abstract。Withtherapiddevelopmentofhighwayconstructioninoarcountry，bridgeconstructionhascomeintheupsurgeperiod．Becauseofthestrongadaptabilityofterrain，thematurityofdesignandconstructionte

2、chnology，long·spancapabilityandthereasonablecost，thePCcontinuousrigidframebridgeiswidelyadopted．Continuouscurvedrigidframebridgewithlong·spanandhigh—piercombinesthemechanicalpropertiesofcurvedgirderbridgeandrigidframebridge，itsstructuralanalysisbecomesmorecomplex．BasedonB

3、aishuichongBridge，theMIDAS，CⅣILfiniteelementsoftwareisadoptedinthisthesistoinvestigatethespatialmechaniccharacteristicofPCcontinuousrigidframebridgeinconstruction．Firstly，theanalysistheoryofcurvedgirderbridgeandthefrequentlyusedanalysismethodsinengineeringareintroducedand

4、concludcdinthisthesis．Thisthesissummarizesthemechanicalcharaeteristics，theoriesandmethodsofFCcontinuousrigidframebridgeconstructioncontr01．Throughcomparingtheresultsofdifferentcurvatureradiusanddifferentheightofpiers，thedeadload,prestressingforce,travelingcarriageload，con

5、creteshrinkageandcreepareconsideredinthestructuraldeformationduringconstructionstages．Threetypicalworkconditionssuchasmaximalcantileverstate，theclosureofmargin-spanandmiddle-span[fiealsoanalyzed．Andtheallocationruleofbox-beamstressanddeformationissummarized．Fortheconstruc

6、tionofthebridgeisallrightandthebeamaxisshapeisappeasedbydesignrequest,thestrategyofconstructioncontrolisalsoanalyzed．TheresultsofthethesisgivesomeexperiencesandadvicetOthedesignandconstruetioⅡofthesimilarPCcontinuousrigidframebridge．KeyWords：PCcontinuousrigidframebridges；

7、curvedgirderbridge；constructioncontrol；finiteelement；concreteshrinkageandcreep西南交通大学硕士研究生学位论文第1页第1章绪论1．1PC连续刚构桥概况1．1．1PC连续刚构桥的产生和发展PC连续刚构这一桥型首先是在国外发展起来的。推动其发展的悬臂施工方法，1950年由前联邦德国首创，它利用已建成的桥墩沿桥跨径方向逐段地悬出接长对称施工，为桥梁建设实现结构高强轻型化、跨度长大化，施工机械化、装配化等方面开辟了新的途径．20世纪70年代，随着预应力混凝土工艺的完善，使

8、用于桥梁的预应力混凝土工艺更加成熟．在混凝土桥的施工中引入钢桥自架设体系的施工方法，即将桥梁的上部结构分节段或分层来逐步完成全桥的施工。也就是无支架而靠自身结构进行施工，人们称之为自架设体系施