波形鋼腹板組合梁橋疲勞性能參數(shù)研究.pdf

1、Y9780621Q21壁=篷曼!亙Zl長安大學碩士學位論文申請學位級別碩士學科名稱橋梁與隧道工程論文提交日期2QQ互：5：2論文答辯日期2Q豎生互目!Q目學位論文評閱人：室=＆蕉墊熊查遘塾墼絲查苧AbstractThecompositegirderbridgewithcorrugatedsteelwebisakindofnewtypestructure，whichmakesuseofthematerialcharacteristicso

2、fconcreteandcorrugatedsteelwebsandshowsit’spowerfulvitalenergiesForthepurposeofdeveloppingfatigueresistancedesignmethods，thedissertationinvestigatesfatigueofthecompositegirderbridgewithcorrugatedsteelwebOnthebasisofanaly

3、sisoftherelatedfatiguetestsresearchesofcorrugatedwebgirders，combinedwiththestructuralandmechanicalpropertiesOfcompositegirderswithcorrugatedweb，thestressdistributionisanalysizedbyaFEAsoftwareofANSYS，especiallyinweb—flang

4、eweldTheresultsoffiniteelementanalysisshowthatthehigheststressandthestressconcentrationfactorsalwaysappearattheendoftheflatpartoftheinclinedfold，pointSandsomeparametershaveaninfluenceonthestressandSCFofpoint(S)tosomeexte

5、ntFortheseparameters，thecorrugationangle(0)istheparameterwhichmostinfluencethestressconditionandSCFnearpointSTodecreasethelowestpossiblestressandSCFatthepointSandimprovefatigueofthecompositegirderwith’corrugatedwebs，para

6、metersofcorrugatewebsshouldbedesignedproperlyOnthebasisoftheParisformulaandlocalstress—strainmethod，thefatiguelifeofcrackinitiationandcrackpropogationcanbepredictedAtwo—stagecalculationmodelpredictingwebflangeweldedofcor