“飛燕式”鋼管混凝土拱橋主拱與端橫梁受力分析.pdf

1、浙江大學(xué)碩士學(xué)位論文“飛燕式”鋼管混凝土拱橋主拱與端橫梁受力分析姓名：林初杰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：陳偉球葉貴如20050201ABSTRACTThestructureofthemiddleloadandCFSTarchbridgeswithflexibletiedbarisnothrustarchstructurebytensingthetiedbar.Theofcastingconcreteintobeari

2、ngsteeltubulararchisoneofthemostcomplexanddifficultprocessfortheconstructionofCFSTarchbridges.Anotherproblemisthatthesidearchneedburdenaftertensingtheflexibletiedbar.TakingtheconstructionmonitoringofaCFSTarchBridgeinhang

3、zhoucityasaninstancemanyproblemsonconstructionoftheCFSTbridgearediscussedinthispaperincluding:theanalysisforsimulatingconstructionphasecomparingtheplainsequenceofcastingconcreteintobearingsteeltubulararcthetroubleremoval

4、fortheendcrossbeamtheoptimizationofthestructureforthesafetyofendcrossbeam.Bytheanalysisforthesimulat噸constructionphaseintroducingthetroubleremovalfortheendcrossbeamtheruleoftheinternalforceforthestructureindiferentconstr

5、uctionphaseisshown.Someproblemsexistingintheconstructionprocessfrequentlyarediscussed.Theefectoftheplainsequenceonthenormalstressoftherelatedcrosssectionisinvestigatedbytheanalysisforthesequenceofcastingconcreteintobeari

6、ngsteeltubulararchofconcretefilledsteeltubulararchbridgeusingthethreedimensionalFEM.Itisshownthattheplainsequenceofcastingconcretehaveanefectontheconcretebuttonoefectonsteeltubebecausetheorderoftheconcretetakingloadisdec

7、idedbytheplainsequenceofcastingit.Thereforewhendesigningtheconstructionphasebigeyesshouldbethrownonthisplainsequenceofcastingconcreteintobearingsteeltubulararc.Itisaproblemtoassuringthesafetyoftheendcrossbeaminthearcwith

8、flexibletiedbarbecauseitisdifficulttoprestresstheendcrossbeamaftertensingthetiedbar即optimizingthestructureofthesidearcandtheendcrossbeamitisfoundthataugmentingtheweightofsidearcisbeterfortheendcrossbeam.Keywordsconcretef