土木工程专业英语 教学课件 作者 陈瑛 7.1.Masonry Properties.ppt

《土木工程专业英语 教学课件 作者 陈瑛 7.1.Masonry Properties.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、7.1MasonryPropertiesMasonryistypicallysiteconstructedusingmanufacturedmasonryunits砌块andsitemixedmortar.Theunitsarelaidinmortartovariousheights,withthestrengthoftheassemblybeingachievedduringcuringofthemortar.Masonryisnormallyusedforcomponentssubjectedtocompressiveloading.Masonrywallsalsohavea

2、limitedcapacitytosupporthorizontalloadsandbendingmoments.MasonryMaterialsMasonryUnitsclayunits粘土砖≥MU10hollow(coresoccupygreaterthan25%ofunit)Perforated[5pE:fEreit]adj.多孔的solidconcreteunits混凝土砌块(solidorhollow)stoneunitscalciumsilicateunits硅酸盐砌块砌体MasonryMaterialsMortarcomposedofcement,lime[laim

3、]石灰andsandbondmasonryunitstogethertoformacompositestructuralmaterial.isafactorinthecompressive,shear,andflexuralstrengthsofthemasonryassemblagecompensatesfordimensionalandsurfacevariationsofmasonryunitsresistswaterandairpenetrationthroughmasonrybondstometalties,anchors,andjointreinforcementso

4、thattheyperformintegrallywiththemasonryunits.MechanicalProperties--CompressiveStrengthmasonryloadedinuniformcompressionfailbythedevelopmentoftensilesplittingcracksparalleltotheaxisofloadingThetensilestresseswhichcausethesplittingtypeoffailureresultfromtherestraineddeformationofthemortarintheb

5、edjointsofthemasonryMechanicalProperties--CompressiveStrengthstrengthofmasonryincompressionissmallerthanthenominalcompressivestrengthoftheunitsmasonrystrengthmaygreatlyexceedthecubecompressivestrengthofthemortarusedinit.MechanicalProperties--CompressiveStrengthThemeancompressivestrengthofplai

6、nmasonrymadewithgeneralpurposemortarmaybecalculatedonthebasisofmeancompressivestrengthofmasonryunitsandcompressivestrengthofmortar:meancompressivestrengthofmasonryunits≤20Mpa≥f2meancompressivestrengthofmortarMechanicalProperties--ShearStrengthTwoformsofshearstrengthexisttensionshearslidingMec

7、hanicalProperties--ShearStrengthinitialshearstrengthunderzerocompressiveloadcharacteristiccompressivestressperpendiculartotheshearplanecorrectionfactorwhichdependsontheclassificationofmasonryunitsinfluencecoefficientcorrespondingtothecombinat