桥梁钢结构疲劳全寿命设计研究

《桥梁钢结构疲劳全寿命设计研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、Y978{02长安大学硕．士学位论文桥梁钢结构疲劳全寿命设计研究刘帮俊申请学位级别塑±学科名称竖墨量丝煎苎壅论文提交日期2QQ壶。监论文答辩日期2QQ6。Q互。Q垒AbstractBridgedesignmanyyearsago，problemsinconstnlctionandseⅣicedonotbeconsidereda11．Itleadstosomequestionssuchasusefunction，stmcturediseaseaIldlowresistance，highenlistment

2、maintenallcecostsetc．AIldsomeeconomicaIldsocialproblemsalsoappearbecauseofthese．IIlsuchsituation，“needssomenewdesigllideawhichcanincludealloftheproblemsin∞nstruction，serviceandm锄agement，that’s“wholelifcdesigII”．Thispaperistheimportantingredientof“BridgeS

3、teelSt九lcture('ompentandcableSystemLifcCircleDesignGuideRuleStudy”whichisthesubsidiarysubjectof“BridgeworkLifeCircleDesigllTheofyandMethodStudy”thatbelongstoNationwesttrafficconstmctionscienceandtechnologyitem．T_llepaperjsestablishedinthebridgesteelstrIl

4、cturecompent．Majorreseachisthefatigueofbridgesteelstnlcture．1ntheanicle，basedon“wholelifedesi印”，itbringsfonⅣardVariableassuraIIcerationinfatigIleequations，sothatdif：l'erentassu砌ceratiocaIIbeusedaccordingtothediffcrenceofstnlcturereplaceablealldsignifican

5、cc．Fatigueinsteelstmctureofbridgeisoneofthemainfactorswhichaf：I．cctdurability．Codefordes咖onsteelstmcturcofrailwaybridgeCrBlo002．2—2005)basedonmanyexperimentshassomepropenysuchasadVancement，applicabilityalldreliability．Itcanshow0urmanufacturecraftandleVel

6、，aIldtherealconditionofbridgestructures．Comparewiththeabovecode，Codefordesignonsteelandtimberstmctureofroadbridge(rrJ025·86)hasdroppedbehindmuchmore．Thecodeadoptstomtioofstressasfatjguecontmlfactorjsqujtcdiffcren￡fromnewthcory'A11ditcan’trevcalreal∞nditi

7、onofstmctures．Theresultoffatiguecalculatingseemstounsafely．That’stosay，ThecodeshouldbetterchaIlge．Theaniclebasesontheexperimentsdonebyrailwayinstituteforalongtime柚dnewfatigueresearchtheoryinsideandoutside，Putf0州ardaset0foptimummethodsforstmcturedesi印．Tll

8、eexpectationistomakeagIlidefordesi弘ers．T1leresultsofresearchintheanicleareshownbydesign兀llesandcalculatingdemonstration，ltexpectstoservefordesigners．Keywords：bridgesteelst九lcture，fatiguecalculating，stmcturaloptimum论文独创性声明本