加大截面法加固混凝土軸壓中長柱縱向穩(wěn)定系數(shù)的試驗(yàn)及理論研究.pdf

1、同濟(jì)大學(xué)博士學(xué)位論文加大截面法加固混凝土軸壓中長柱縱向穩(wěn)定系數(shù)的試驗(yàn)及理論研究姓名：韓兵康申請學(xué)位級別：博士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：朱伯龍19960401同濟(jì)大學(xué)申請博士學(xué)位淪文_I___●_l●_____●_I__#≈__l___目________l___I目∞IExperimentalandTheoreticalStudyontheLongitudinalStabilityFactoroftheSlenderConcreteColu

2、mnsStrengthenedwithConcretesubjectedtoAxialLoadAbstractThisPhDthesisw鍛aimedatthemengtheningmethodofelllarsinsthecolumnsize，adop協(xié)dopeninthepr枷cale哂n∞fir翰withwluchthe&Csm∞mrowere蛐嘲_lgm∞edWimcompu鋤。simulatingtestbasedonthew

3、holeprocessanalysis，asastudyway，combinedwithtwoama留瞻columninlaboratory，theprobl鋤abouttheloq五tI】逋nalstabilityfactoroftheslenderl乙CcolumnsstrengthenedwithCOrlClO協(xié)underaxislloadwasstudiedindetailIn＆Imewaytheproblemaboutthe∞

4、啊礦i瑪capacityoftheshortcolumnss燈engthenod誦tllconcrefeunder嫡alloadWaSstudmdandtheoreticaldeducednemainjobsandconclusionsinthispaperasfogows：1、Inthewholeprocessanalysis，formulasoftherdatiomhipb毗w嘲s扭essandsUainoftheoldconcre

5、teWaSdeducedwithconsiderationofthecreepintheoldconcreteunderpermanentloadbeforeandatterstrensthmedAnewassumptionfordistributionoffiberstrainincompositese甜onw越recommendedthisisi螂easeinstrainsinconcretesndreinforcementared

6、erivedassummsthat#ane∞mp0|si協(xié)sectionremains#areUsingcreeptransformedseetiollpropertiesthechangeinfiberstrainandstressandindeflectionoftheslendercolumnunderpermanentlosdinthestageofcreepWaScalculatedAprogramforanalyzingth

7、eperformanceofslenderandshortcolumnss燈engthenedwithcot謝eteinthewholeloadingprocesswascompilea“thFORTRANlanguagemsprogramc獅beusedforsimulatingthewholeloadingl瞳ocessofcm材etecoltmmsstrensthenedwithconcreteinanywaytraderaxia

8、lload2，ThroughteststudyOntWOslender＆Ccolumnsinlaboratorythebrokenperformameandthedis仃ibufioncharacteristicofthefiberstrainoftheslendercolumns，sa伽gthenedwithconcreteundernonunloading“OgL甄OstudiedindetailBycompmastheultima

9、teloadoftwocolumnsobtailledby儲twiththosebyeomputersimtd撕ngtestandformula(412)ofTechnicalSpecificationforStrengtherangConcreteStructurcs(CECS25：90)，itturnedoutthatitisfalseinconcepttocalculatingthecarly崦capacityoftheslend

10、er鼬陷哩曲IenedcolunmslosingstabilityinthelightoftheCodeandtheresultsisconservative，thatthevaluesbycomputersimulatingtestcouldobtainverygoodagreementwimthosebytestinlaborat哪3、Throughanalysisintotheresultsofcomputersimulating

11、testof206shorteohmmsand306deridereolonmsstrengthenedwithcompeteofsomeparametersubjectedtoaxialIoad。studyOninfluenceofdifferentparameters(nonunloadinglevelbeforestrengthened，creepcoefficient，aroaratioofn吼vs蒯∞tOoldseol20n。

12、s岔engthratioafnewco懈etetooldconcrete，steel捌陋afor曲舊哩；IhelIi塢，slendernessratiobeforeandafters掃engthened)uponthecarryingcapacityofstrengthenedcolumnsFormula細(xì)cal叫a缸鴨thelongitucUnalstabilityfactorissuggested，器reflectstheperfo

13、rmanceofslenderRCcolumnssUm蛐eneOwithconcretesubjectedtoaxialload4、Through懿perin刪andtheoreticalstu由ontheperformanceofstrensthenedcolumnssubjectedtoload，twoproposslsfordesignofcolumns殉期唱：dl艦Iedwithconcretesubjectedtoaxiall