現(xiàn)澆混凝土空心樓板的應(yīng)用研究.pdf

1、廈門大學(xué)碩士學(xué)位論文現(xiàn)澆混凝土空心樓板的應(yīng)用研究姓名：徐繼東申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：張鵬程20070501AbstractCastinsituhollowfloorisanewtypeoflong—spanstructuresystem，whichCanreducetheselfweightofthestructurebyembeddingpermanentcavitiesinthickplankItisapplica

2、bletobuildingswithgreaterloadsandspanItcaneconomizethestoreyheight；reducethetotalcostoftheprojectSoitisatypeoffloorwithgoodapplicationfunctionandeconomybenefitCastin—situhollowfloorhasbeenappliedtobuildgreatmultiplebayst

3、ructureswhicharecontinuouslycastwithoutconstructionjointsThepilotprojectsindicatethatthestructurehasgoodcrackresistanceThekeyproblemofhollowflooristhelawofstressdistributionunderloadsactionPresentlymostresearchesoncast—i

4、n—situhollowfloorarefewnessexperimentsandsimplenumericalsimulationPeoplecanknowthemechanicscapabilityofthehollowfloortoacertainextentthroughtheseresearches，butitisnotveryclearyetThepaperutilizesFEMsoftwaretoanalyzethehol

5、lowflooraccuratelybasingtheconclusionsofotherresearchdepartments；itrevealsthelawsofstressdistribution，shearstressdistributioninthesectionandlawsofdeformationofthecastinsituhollowfloorThekeyproblemofsuperlongconcretestruc

6、tureishowtocontrolthecrackundernon—loadfactorsThemainnon—loadfactorsare：thermalstresscausedbytemperatureriseduetohydrationheat，shrinkageofconcreteandthethermalstressduetovariationofambienttemperatureThepaperstudiedthehyd

7、rationatearlyages，shrinkageandthestrainofsteelbarthroughexperimentsItutilizedFEMsoftwaretosimulatethetemperaturefieldofcastinsituhollowfloorandcomparedthecomputationresultswiththeexperimentresultsItindicatedthatitwasfeas

8、ibletoanalyzethetemperaturefieldthroughFEMAtlast，thepapersummarizedthelawsofdistributionofthetemperaturefieldandthemainfactorsinfluencingthetemperatureriseduetohydrationandputforwardsomemeasurestocontrolthetemperaturefie