基于現(xiàn)場測試的拱橋鋼管混凝土拱肋徐變效應研究.pdf

1、北京工業(yè)大學碩士學位論文基于現(xiàn)場測試的拱橋鋼管混凝土拱肋徐變效應研究姓名：謝勝濤申請學位級別：碩士專業(yè)：結構工程指導教師：閆維明20070501ABSTRACTAsthescience、technologyandtrafficisrapidlydevelopinglongspanconcrete—filledsteeltubular(CFST)archbridgehasbeenusedanddevelopedrecentlybecaus

2、eithastheadvantagessuchashighstrength、bigstiffness、lightstructure、beautifulmodel、supercrossingabilityandsl怵constructionperiodMeanwhilewiththeconcretecreeptheoryandconstructiondevelopingrapidlypeoplebegintopaymuchattentio

3、ntotheproblemofCFSTcreep，anditismorecomplicatedthanthatofordinaryconcrete，becausethecoreconcreteofCFSTstructureisintheairtightenvironmentofthesteeltubulartheinfluencebyexternalenvironmentisrelativelyslightmeanwhile，thest

4、ressoftheconcreteisdecreasingandthatofthesteeltubularisenlargingduetotheredistributionofsectionstressbycreepFirstlyhavingcombinedfiniteelementanalysiswithCFSTarchconcretecreepexperimentsofcoustructionsitewegetresearchdat

5、athroughfiniteelementanalysiscomputationandsteeltubularstress—termofdifferentconditionsanddifferentcircumstancesintheconslxuetionsiteIproposetheconceptofbasicandinclusiveeffectfactorofcocretecreepandthenmakeuseofthisconc

6、epttoanalyzethedatagainedaimingatgivingthecalculationmodelofcreepcoefficientandcalculationmethodofconcretecreepwhicha∞mostsuitabletothecircumstancesstressmadworkingconditionofsteeltubulararchinsideSecondly，havingcombined

7、finiteelementanalysiswitllCFSTarchconcretecreepexperimentsofconstructionsiteinviewofeachkindofoperatingmodeandworkingconditionsIgain山einclusiveeffectfactorofCFSTanddrawbackthecreepeffectcoe麗cientbasedonthemethodthisartic

8、leproposedFinally，bycomparingthesteeltubularstresssurplusofdifferentsectionsalongthearchlineofairpipearchandCFSTarchandtheoneofthesamecrosssectionofdifferentpositionsweproposetheconceptofCFSTarchcreepinternalforcecalcula

9、tionenvelopeandprovidegoodconferenceforconsideringconcretecreepeffectwhendesigningCFSTarchbridgesandtheirrelatedconstructionsInaword，theseachievementsmaturethedesigntheoryandmethodsofCFSTtrUSSarchbridge，andprovidebenefic