风区大跨度连续梁桥施工控制分析

《风区大跨度连续梁桥施工控制分析》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、风区大跨度连续梁施工控制研究AbstractSince2009ourcountrytovigorouslydevelopthehigh-speedrail，China’Srailwaybridgeconstructionprojectscareerhasdevelopedrapidly．Continuousgirderbridgeisanoftenseenontherailwaybridgetype，Continuousbeambridgewiththeconstructionofcantileverconstructionmethod，Structureundergoes

2、aprocessofsystemtransformation；Inthisprocess，Thestressstateanddisplacementofthebridgestructurewithalotofuncertainty，Therefore，long-spancontinuousgirderbridgefiniteelementmodelcalculationandstrictconstructioncontrolisnecessary．Inthispaper，theseconddoubleofpracticalengineeringLan-XinHuoexpre

3、ssway，cross—connectedcontinuousgirderbridge，thispaperconductssimulationanalysistothisbridgethroughthelarge-scalefiniteelementsoftware—MIDASCIVIL．Themainbridgeofthisbridgeusestheexistingrailwaywithcontinuousbeam；thespanis60m+100m+60m．AdoptingpouringConstructioncraftsofcantilever，thebeamstru

4、ctureneedsuccessivelyexperiencethefollowingprocess：Pierbeamconsolidation，consolidatingpierbeam，Pouringcantilever，foldingsidespanconcrete，removingtemporaryconsolidationandfoldingmiddlespanconcrete．Errorcomparisonismadebetweentheoreticaldataobtainedandmeasureddataofcon—structionprocess；throu

5、ghthecomparativeanalysis，theoreticaldataandthemeasureddatahasalittledeviation，butitiscoincidingonthewhole．Theresultsofsimulationcalculationonconstructioncontrolhaveguidanceonactualconstructionprocessandprovidebasicguaranteeandtheoreticalbasisforthewholebridgefoldingsmoothly．Thecloseoftheco

6、ntinuousbeambridgecanbeselectedaccordingtotheactualconstructionconditions，Duetovariousreasonstheconstructionfinishedonthe24Blockafterthebridgetochangethecloseapproach，MiddleCrossClosebyfirstchangedtothefirstEdgeCrossClose，Bythesoftwareanalysis，Firstinthebeamcrosscloseparagraphdisplacement-

7、18．65mmsidespancantileverdisplacementof13．36mm；FirstCrossCloseonly4．67mmsidespancantileverdisplacement一1．74mm．Thetwodeadloadconstructionphase，Firstinthebeamcrosscloseparagraphdisplacement61．97mmsidespancantileverdisplacementof-130．65ram；FirstCrossCloseonly一12m