一种新型承重砌块砌体基本力学性能研究-结构工程专业论文.docx

一种新型承重砌块砌体基本力学性能研究AbstractBasedontheexperimentalresearch，thefundamentalmechanicalandnon—linearbehaViorofP．KblockareanalyzedanddiscussedwithseVeraltheoryandFEAmethodareused．Throughtheexpenmentsof48compressionspecimens and18shearspecimens，thefailurepattern，thecrackingresistantload，theultimateload，thestress-straincurVe，theelasticmodulus，Poission’sRatio，theshearmodulusandthefailurepatterninsheartest，shearstrengthareanalyzed．Datasgotfromthoseexperiments reVealthattheP．K blockisbrittlerthanusualones．andithaslowerultimateloadundercompression，it’sshearstrengthisclosetotheValuewhichthecodeproVide．Thecalculationformulasforcompressionstrengthandshearstrengthare regressed，alsowiththeexpressionsofstress-straincurVe，theelasticmodulus，Poission’sRatioandtheshearmodulus．DesignofmasonrystructurewithP．Kblockcanbebenefittedf．romthisresearch．SummingupthemeritsanddemeritsofP．Kblock，aVenicalh01econcreteblockisbrou曲toutforabetterfundamentalmechanicalqualitywithapreconditionofpreservingtheoldone’smeritofenergysaVingandheatpreservation．Thecalculationf．onnulasf-orcompressionstrengthandshearsn‘engtharef10rwardedbythetheroymethod，thoseformulasshowthatthefundamentalmechanicalqualityoftheVerticalholeconcreteblockisbetterthantheoldone．Atlast，thegeneralnon-linearFEAprogramANSYSisusedtosimulatethetestresultsandreapeartestprocessofthose blocks．Byparametersalterationanalysis，theef．fectofmainf．ctorsinthecompressiVestrengthandshearstrengthofthoseblocksareanalyzed，andthedistributionofstressofconcreteblockmasonryunderloadispresented．TheresultsofFEAshowtheweaknessoftheP．Kblockexpressly，tothe P．Kblock，thisisausefulreferrenceforafutureimproVement，inaddition，theresultsproVethattheimproVedblockmentionedinthispaperisreasonableinsomedegree．Thewelprecisionofresultsbynon-1inearnniteelemnetmethodforconcreteblockmasonryproVethatANSYScanbeusedonthemasonry non·linearFEA．DesignofmasonrystructurewithP．Kblockcanbebenenttedfromthisresearch．III硕十学位论文KeyWords：Concreteblockmasonry；MechanicalbehaVior；Compressionstrength；Shear