斜拉橋合理設(shè)計狀態(tài)確定與施工控制.pdf

1、湖南大學(xué)博士學(xué)位論文斜拉橋合理設(shè)計狀態(tài)確定與施工控制姓名：顏東煌申請學(xué)位級別：博士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：劉光棟易偉建2001.3.1塑墮查蘭墮塑三堡主些苧主堂垡堡壅ABSTI認(rèn)CTTherearemanyresearchresultsindeterminingthefinishedstateandconstructionstatesandinconstructioncontrollingofcable—stayedbridgesHow

2、everther∞arestillalotofproblemsintheapplication，especiallywithoutanintegratedmethodHavingdonemanystudiesinthesethreeaspectsthroughoutmorethantencable—stayedbridges，theauthorhascomeupwithanintegratedmethodandavisualizatio

3、ndesignofcomputerprogram1Anoptimizationmethodfordeterminingthereasonablefinishedstateofcable‘—stayedbridgesbyaimingtorestrictthestressofthemainbeamisintroducedThemethodhasfoursteps曲Ascertainthereasonableprestressingquant

4、ity，underthecontrollingconditionsaccordingtothemostandtheleaststressesofthetopandbelowedgesofthebeamcontrollingsectionb)Collocatetheprestressaccordingtothereasonableprestressandotherdesigndemandsandthenascertainthedeadmo

5、mentfeasiblefieldofthemainbeamofthefinishedbridgec)Takingthecabletensileforcesofthefinishedbridgeasvariables。Wecanformaoptimizationmodelwhichissubjectedtotherestrictionconsideringtherequirementsofuniformofthecableforces。

6、theresistanceofthesideandassistantpiers，thebendingofthetowersandthedeadmomentfeasiblefieldofthebeamd)Makeouttheoptimizationmodelandthenattainareasonablefinishedstate2Aforward—iterationmethodfordeterminingthereasonablecon

7、struetionstateofcable—stayedbridgesiSintroducedThemethodisdescribedasthefollowingAfinishedbridgestateisgottenwiththeforward—calculationpresumingthecontrollingcabletensingforcesWecanmodifythecontrollingcabletensingforcest

8、ominimizethedifferencevaluesbetweentheresultandthepredeterminedvalueoftheresonablefinishedbridgebytheleastsquaresmethodIteratetheaforesaidprocedureuntilthevalueisconstringedThemethodonlyrequiresforwardcalculation。evenitc

9、anminimizetheeffectofno—closurebytheleastsquaresmethodAdvantagesofthismethodincludesfourpoints1)Itsimplifiestheinputofcalculatingdatagreatlybecauseitonlyneedtodoforward—analysis。whileothermethodsalwaysneedstodobackwardan

10、alysis2)Itavoidstheproblemofno—CIosureAIthoughthecalculationhas8differencecomparedwiththereasonablefinishedbridgestate，thedifferenceiSSOpunybyoptimization(1eastsquaresmethod)thattheresultcanmeetengineeringrequirement3)Le