脹錨型錨栓（群）受拉極限承載力研究.pdf

1、同濟大學碩士學位論文脹錨型錨栓（群）受拉極限承載力研究姓名：朱國棟申請學位級別：碩士專業(yè)：建筑與土木工程指導教師：陳世鳴20040601捅要同濟大學申請碩士學位論立_AbstractBuildinganchorplaysanimportantroleinpost—anchorageofconcreteInfluencedbyvariousfactorssuchasitsembedmentdepth，theaperturediameter

2、thegapsbetweenanchors，concretestrengthandaswellasthicknessofconcretecoveretc，load—bearingcapacityoftheanchorisbasicallydeterminedthroughapull—OUttest，inwhichanindividualanchorispulledoutfromtheconcretebaseInpracticerelev

3、antparametersthatgoverntheloadbearingcapacityofanchorssuchasembedmentdepthinconcreteanddiameterofshankareusuallyprovidedbythemanufacturerofproductsanddesignerscandosomesimplecalculationt0extrapolatetheload—bearingcapacit

4、yofanchorsfordifferentdiameterandembedmentdepthbyexperiencesInthiswork，applicationandcurrentstatusofconcretepost—anchoragetechnologyarebriefed：thecharacteristicsandfailurebehavioroftwotypesofconcreteanchorage，whicharemet

5、alanchorfasteningandchemicalanchorfasteningaredescribed，failurepatternsofCOnstructionanchorsarcanalyzed，strengthcriterionofconcretebasedontheOttosen’S4parametermodelissummarizedBasedonaspatialhalfspaceinfinitymodelwithan

6、innerconcentratingforceexerted，elasticitytheoryisappliedtoderivethetheoreticalsolutionoftheproblemAnexpressionoftheconicalfailuresurfaceofconcreteisdeducedInaccordancewiththefailurepatternsofanchorage，theultimatetensilec

7、apacityofexpansionanchorsisstudiedStudyontensileloadcapacityofindividualanchor：Basedonelastictheoryst／esgdistributionofconcretearoundaindividualexpandinganchorunderpullingisanalyzed，strengthcriterionbased9nthe4parameterm

8、odelofOttosen，isusedinderivationoftheconicalfailuresurfaceofconcretetheformulaoftheultimamload—capacitybasedonthecomcalfailurepatternofconcreteforindividualexpandinganchorisderivedTheinfluencesonultimatecapacityarediscus

9、sedResuItshowsthatwhenconcreteconeisbrokeninthebase，themagnitudeofultimatetensilecapacityisproportionaltotheprojectingareaoftheconicalsurfaceofconc／@te，whichcouldbeapproximatedasthefollowing：P=移(142h)2=63ffll：where五isfor