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《大跨度鋼管混凝土拱橋穩(wěn)定性研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、西南交通大學(xué)碩士學(xué)位論文大跨度鋼管混凝土拱橋穩(wěn)定性研究姓名：黃瑋申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：劉元久20080601西南交通大學(xué)碩士研究生學(xué)位論文第1I頁(yè)AbstractWiththerapideconomicdevelopment,．TheCFSTisconsideredasthepreferentialstructurematerialformanyadvantagessueh嬲reducingthematerialsandstructureweight，easyconstructionandlargebearingcapacityere．W1
2、lile，theCFSTarchbridgeiseharacterizedascontinousconstructionsystemchanging,seriously110n-linearinflueneing，highlycouplingoftheconstructionprocessandthebridgestatusincompletedstage．So．itismostvaluabletocarryOllthestabilityaiialysis．BasedOntheNanningbridge，thestabilityanalysisineachstage
3、oftheconstructionwascarried011．．(1)Thebasicstabilitytheoryandthecomputingtheoryofthearchbridgewereintroduced，consideringthecharacteristicsofthesteelconcretearchbridge，theevaluatofiindexandfailurecriteriawerepresentedaswellasthefailuremodesofthebridge．theSincrementalfiniteelementmethods
4、werealsodieussed．(2)Adoptingtheunifiedstrain-stressmodel，theCFSTwereconsideredaSonecombinedmaterial．WiththehelpoftheANSYSprogram,thesteelconcretearchbridgewasconstructedwiththebeaml88elementtype．0(3)Theconstructionprocessofthesteelconcretewascomplicated．Eccentricloadinducedbythepumpedc
5、oncreteinthesteelpipeandthechangeofthestiffnessinfluencingOilthestabilityofthestructureWaSlarge．，nlestabilityofthestructureineachstageofthesixpumpplanswereanalyzed．碭eoptimalsequenceoftheCFSTwasgained．··(4)Basedonthebucklinganalysisandthearc，lengthcontrolledincrementalfiniteelmentmethod
6、s，tlleIinearelasticandelato-plasticstabilityofthebridgeintheconstructionandfinishedstageswerecomputedandanalyzed．ThefirstandSecondstabilityfactorsandfailuemodeswereobtained．The110n—linearfeaturesinfluencingOilthestability．ofthebridgewereanalyzed．ItWaScomideredthatinitialgeometrydefects
7、andnon-liearmaterialweremajorinfluencingfactors．While，thenon-linear●geometrym．flueneingOnttie．stabili哆factorswascomparativelylittle．Consideringthewindloadinfluencingonthestabili夠ofthestructure,the．1ateralstabilityofthestructurewasanalyzed．．砌e，the．ratioofthewideandspaninfluencingOnthe
