武廣客運專線140m鋼箱系桿拱橋拱腳模型試驗研究.pdf

1、中南大學碩士學位論文武廣客運專線140m鋼箱系桿拱橋拱腳模型試驗研究姓名：余山川申請學位級別：碩士專業(yè)：固體力學指導教師：葉梅新20090401ABSTRACTWithaspanof140meters，theTingSiBridgeisasteelboxthroughfledarchbridgeofWuhan—Guangzhoupassengerdedicatedline，whichoverpassestheBeijing—Zhuhai

2、highwayBeforethecompletionofthisbridge，nosuchhighspeedrailwaybridgehadbeenbuiltThespanofthebridgeislargewhilethearchspringeristhecrucialpartofthetiedarchbridgeTherefore，inthispaperlarge—scalemodeltestsofthisbridgewasmade

3、onthebasisofanalysisThemainworksareasfollows：1ThescopeofarchspringermodeltestsandlocalanalysesweredefinedaccordingtotheprinciplesofSaint—VenantMeanwhile，basedonthethreedimentionalfiniteelementanalysisofthewholebridge，thr

4、eemostunfavorableloadcasesoftheanalysisandmodeltestsweredetermined，thatis，砧theloadcaseofmainarchtosubjecttounfavorableaxialforce；b，theloadcaseofmainarchtosubjecttounfavorableinplanebendingmoment(vertical)；c，theloadcaseof

5、mainarchtosubjecttounfavorableoutofplanebendingmoment(crossdirection)2LocalfiniteelementanalysisunderthethreemostunfavorableloadcasesofthearchspringermodelWasconductedTheresultsprovedtobeinosculatewiththefiniteelementcom

6、putationsofthearchspringerofthetruebridge3Areduced—scalemodelof1：4Wasmadeaccordingtothetheoryofsimilaritymoreovertheanchorageandloadingproposalsofthemodelwereresearchedanddesigned4Afterthemodeltestsunderthethreemostunfav

7、orablecases，theresultsshow：theoutcomesofthefiniteelementanalysesofthearchspringertallywellwiththoseofthemodeltestsIfthemainarchandthetiebeamareinperpendicularconnection，theconcentrationofstresswillbeobvious，whileincircul

8、arcurveconnection，theconcentrationofstressCanberelievedThestresslevelofthearchspringerislowingeneral；thearchspringerisstressingsafetyandreasonabledesignedTheresultsofthispapercanservicedesignofthisbridgeandprovidereferen