活性粉末混凝土（RPC）梁高的優(yōu)化研究.pdf

1、北京交通大學碩士學位論文活性粉末混凝土（RPC）梁高的優(yōu)化研究姓名：李輝申請學位級別：碩士專業(yè)：橋梁與隧道工程指導教師：閻貴平20060301北京交通大學碩士學位論文摘要Abstractmahi越，prcstrcssedconcrete百rderShavebeenwidelyusedinrailwaybridgesButthercexitsomedefbctsintheconVentionalcoⅡcrete，suchas10wcomp

2、ressivestrengtll，】owtensilestren毋handpoordumbility，whichnotoIllyobstmcttheconcretebridges打0mdeVelopingintolowerweightaIldlongerspan，butalsonegativelyinnueⅡcethesafctyallddurabilityIEspecially，atpfcsenttllepassengcrsp。dal

3、railwayliIIeaIldhigllspeedrailwayarebeillguIlderconstmctjoninouroguntry，wllichdemandtheconcretewithbenermech蛐icalpropenyaIlddurabiljtyAsresultofthehugesectionsizeofstrIlcturesmadeOftraditiOnalconcrete，asubstitutemater主al

4、withbenerperfoml鋤ceisⅡeededtoreplacethetraditionalconcretetoreducethesectionsizeandweightDuetoitsprcmiummech鋤icalpropertiessuchashi曲compressivestren甜h，hi曲ductility，higlldllrabilityaIldlowp唧eabilityandsoon，RPc(ReactivePow

5、der(bncretc)isquite印plicabletothecons咖ctionofthepassengerspecialrailwayline趾dhighspeedrailwayAimiIlgfortheRPC’spopularizationinpracticaleⅡgiIleerings，thepapercombiIlesfiniteclement卸alysis鋤d叩timizationmetllodtotheoretical

6、lyanalyzeRPcT西rdefsinpassengerspccialrailwaylineandbox垂rdersinh蛐speedrailway11Ieoptimal百rderdepthsalldprestressedreinforcememarcasofdi任ercntspanshavebecnobtainedbyFEMmodelandoptimizationanalysis，andthesolutionsc蛆providet

7、heoreticalbasisforthepractjcalenginee血gsofRPC7I二girdersandbox—girdersopt曲izationof5differentsp柚T_垂fdersand6di髓rentspallbox一畫rdershaVebeenconducted，respectiVelythentheoptimaldeptllsarcgained仃omthea11alysisBaSedontheoptima