涵洞鋼波紋管力學特性的試驗研究.pdf

1、南京航空航天大學碩士學位論文涵洞鋼波紋管力學特性的試驗研究姓名：錢海濤申請學位級別：碩士專業(yè)：道路與鐵道工程指導教師：夏逸鳴201103涵洞鋼波紋管力學特性的試驗研究iiABSTRACTAtpresentmostofsmallbridgesculvertsintheroadstillusereinfcedconcretemasonrymaterials.Intheprocessofsubgradecompressivestrainfou

2、ndationsettlementdefmationthepipeculvertbuiltonsoftsoilfoundationisveryeasytoleadtothedestruction.Ifthecrugatedsteelpipeculvertwithgreatflexibilityhighstrengthcouldbeputintouseitcangreatlyimprovetheadaptiveabilityofthefo

3、undationbasisdefmationtoslovetheunevensettlementoffoundationproblemswhichwillcausethedamagetotheculvert.ItisthefirstapplicationinChinatotestthemechanicalpropertiesofcrugatedsteelpipeculvertbyfiberBragggratingsens.Compare

4、dwithtraditionaltestingtechniquesopticalfibersensingtechnologycaneasilyovercometheshtcomingssuchasvulnerableoftheenvironmentalimpactelectromagicinterference.Aftertemperaturecrectionitcanreachhighprecisionwhichissuitbalet

5、olongtermmonitingfthethedefmationreliabilityofengineeringstructures.Currentlytheadaptiveengineeringresearchofcrugatedsteelculverislessinthesoftsoilwithhighgroundwaterlevel.Inthispapertwocrugatedsteelpipeculvertswereedint

6、henthernextendedroadofNanjingYangtzeRiverNo.4Bridge.Experimenttestsnumericalcomputationmethodswereusedtoanalysisitsfceacteristicsunderdifferentfillheightsvehicleloadssummarizethechangesinlawrefineengineeringdesignelement

7、stoimprovethestructuraldesignofcrugatedsteelpipeculverts.Theresultsfromexperimentaltestsfiniteelementanalysisshowthatthesteelroundpipeshaveaverylargelongitudinaldefmationcompensationcapacityaftertreatedwiththeripplealong

8、itsaxis.Itisabletoprovidestretchingroomofthematerialtoadapttofoundationdefmationwhichcandevolopsufficientlyonitsgoodfceacteristicsofradialaxialunderthelargefoundationdefmation.Sothecrugatedsteelpipeculvertcandispersionlo

9、adeffectatgreaterextenttoplaytheadvantageofsteelstructure.Therefeinthesoftsoilexpansivesoilcollapseloesspermafrostotheradversegeologicalconditionsithasobviousadvantagestousecrugatedsteelpipestructurefconstructingtheculve