超長混凝土結(jié)構(gòu)溫度及收縮裂縫控制方法研究.pdf

1、東南大學碩士學位論文超長混凝土結(jié)構(gòu)溫度及收縮裂縫控制方法研究姓名：王慶龍申請學位級別：碩士專業(yè)：結(jié)構(gòu)工程指導教師：吳京20050501ABSTRACT東南大學碩士學位論文RESEARCHoNSoLUTIoNoFTHETEMPERATUREANDSH砌NKAGECRACKCoNTRoLINoVERLoNGCoNCRETESTRUCTUREABSTRACTThechamcteristicofoverlongconcretestmcturei

2、st11atits1en甜hexceedsthecodelirnitsandthcstresscausedbytemperatureands礎(chǔ)ageismtherla唱e，whichusuallybringscradkinstn】ctllreSometiInes也ecrackissowidethatmesmlcturecall’tbenoHnallyusedSometempemtureafldshrinkagecrackhasbeena

3、pivotalproblemt0besolvedu唱entlyBasedontheⅡleoryofthetemperaturea11dsnkages廿ess，severalmemodsofcomrollingmecmckarestudiedThecomemsareasfollows：1TheconcretestructllredefomsbecauseOfⅡletemperature’scha_ngealldshrinka鳊Thebea

4、mandslab’sdefoⅡnationwillbeconstr咖edbvmec01u舢a(chǎn)ndshearwall，andthenstresstakesplaceinmestructurewhichiscaUedthetemperatIlreandshriI止a2es訂essT、vomaillinnuencingfactorsare血etemperatllre’schange(includiflgtheequivalenttempera

5、ture’scha工lgebyshrillkage)andconstraintsTherearetwokindsofideasinthec翔ckcontroI0neistoenhancetheconcrete’stensilecapability，suchasexeningprestressandaddingtensile舶erimoconcretesTheot壬1eristoInjllishmesh_essbyweakellingme

6、constraints，suchassemngdefb姍ationsIotsa11dinstalliIlgtherubberbearing2Severalimportantafrectingfactorsonthetempera【tlIreandshrirlkagestressareanalvzedandthedistributioncharacteristicofthestressi11thestIuctllI℃issnldiedTh

7、ewholetemperamrcdeclineisaslow’seasonalcollrseWhenithappens，mesn己sswillberanlerlargeinmebottomt、vofloorswhileitisquitesmallin廿leo血ernoorsThetopnoor’stempemturedeclineisaratherquickcourseWhenithappeIls，thes仃esswillberathe

8、rlargeinthetoptwonoorswhileitisquitesmaUintheotllcrf100rSMbreoverme口eaks缸℃ssofbeamsandcolu】nnsattheendsisqu“Blarge(especiallyofmec01umn，sometimesitwillcauSethec01umntobreak)，wllichgreanyexceedsmatoftheslabandhappensnomat

9、terhowⅡletempemtllrechangesHoweverjthisisusuallvi2皿oredinthe口ast3Asforthepresn℃ssedconcretes仃Ilcture’scrackcontrol，firstly，specialattentionmustbepaidtostrIlcturedisposal，secondly，thepres訂essIlcedstobeexactlycalculated，mo

10、Ieover’imponancemustbea札achedtothedetailingmeasuresInthecons廿Ilctionofoverlongconcretestmcture，theafte卜pourin2zoneissetteleasetheforeparts11ril止ages仃ess，andprestressisexertedsubsectionbysubsectionThestudyindicates：proper

11、simulationofanerpollringzoIleisofgreatimponancetoeValuatetheefI、ectofmeprestressBymeansofthefilliteel鋤emanalysissonwareANSYS，thecomputingmemodisproposedwhichconsiderstlleconstmctioncourseaIldis矗lrmcrexDatiatedcombmedw汕nu

12、mericalcases4ByreferringtotlleMdgeengineeringexperience，tllememodofinstallingmembberbearinginthecOncrete矗ameisputfonvard，whichisameaningmltryoncrackcon廿01A丘eri11stallingthembberbe撕ng，metemperaturealldshrinkagestressdrops