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1、重庆交通大学硕士学位论文“释能法”加固桁式组合拱桥结构计算分析研究姓名：李世春申请学位级别：硕士专业：桥梁与隧道工程指导教师：蒙云20100401ABSTRACThetrussedcombinationarchbridgeoriginatedbyourcountryinthe1980'sissuchanewtype.Comparedwithotherkindbridge,itwassimpleandcostless,aswellasbenefits,soithaddevelopedrapidlyinthepast30years.Butmanyproblem
2、saboutthiskindofbridgehaveariseninrecentyears.Clearly,wemustreinforcementandrepairofthesecriticallydangeroustrussedcombinationarchbridgestimely.However,thecurrenttraditionaloldbridgestrengtheningandmaintenancemethodsoftrussedcombinationarchbridgehaveplayedratherlimitedroleinmostca
3、ses."Themethodofreleasedenergy"(ERmethod)isakindofnewmethod,newtechniqueandnewcraftworktoquicklyimprovecarryingcapacityofbridge.Themethodchangesappliedforcesystemofmainarchbyprocessingarchspringingwithspecialtechnique,releaseinternalforceofmainarchspringingoforiginalbridge,redistr
4、ibuteinternalforceofmainarch,improvebehavioroforiginalbridge,explorepotentialofmainarchoneself.Withthein-depthstudyofERmethodreinforcementtechnologyandmoresuccessfulbridgereinforcementuses,ERmethodreinforcementtechnologyhasbeenrecognizedbymoreandmorepeople.Especiallyin2008year,hea
5、dedbyProfessorMeng,ChongqingJiaotongUniversityresearchgroupof"ERmethod,"successfullycompletedtheYuancunbridgereinforcingprojectofGuizhouProvince,reinforcingeffecttobeahighdegreeofpeerrecognition.So,itisofgreatsignificancetostudythecalculationandanalysisoftrussedcombinationarchbrid
6、ges.First,basedonthefirstdesignandconstructiondrawing,usingDr.bridgeplanefiniteelementanalysissoftware,establishingplanefiniteelementmodelofFadebridgeinGuizhouprovincetosimulatetheconstructionprocess,andthroughstaticanalysisunderconstantload,theliveloadandloadcombinations,theautho
7、rreachedtheresultthatthemainreasonswhydiseasesanddeficienciesappearintrussedcombinationarchbridge.Second,usingthefiniteelementnumericalanalysissoftwareANSYS,simulateboundaryconditionsofERarchbridgeby"contactsurface"，resolvedtheboundaryconditionsinfiniteelementmethodwhichinreinforc
8、ingarchbridge.Andthen,takeFadebri
