基于數(shù)值模擬研究骨料對(duì)混凝土應(yīng)變場的影響.pdf

1、東南大學(xué)碩士學(xué)位論文基于數(shù)值模擬研究骨料對(duì)混凝土應(yīng)變場的影響姓名：朱潔申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：力學(xué)；固體力學(xué)指導(dǎo)教師：何小元20110311東南大學(xué)碩士學(xué)位論文AbstractWhileaggregateiSallimportantrawmaterialofconcrete，themechanicalpropertiesofconcretearedependentonitsstrengthelasticmodulus，shape，siz

2、eanddosageIntheengineeringdesignandtestconcreteisusuallyconsideredasahomogeneousmaterialHoweverweoftenchoosetheaveragestraininacertainsizerangeasthestrainofconcreteThemainpurposeofthispaperistoanalyzetheeffectsofaggregat

3、eonconcretestra砜andfindtherelationshipbetweentherangeofconcretestrainmeasurementandmaximumaggregatesizeFirstlythenumericalmethodisemployedtosimulatetheconcretewhichmaybeconsideredasathree—phasecompositematerial，consistin

4、gofaggregates，cementmatrixandinterracialtransitionzone(ITZ)Locationsofaggregatescallbecalculatedandthecircleaggregatedistributionsintwo—dimensionconcretealeavailablebyusingaprograminFortranThenthemethodofITZsimulationand

5、finiteelementmeshingareproposedAssuchafiniteelementmodelisestablishedSecondlyafiniteelementsoftwareAnsyscallbeusedtoanalyzethenumericalconcretemodelsTheeffectsofthemesosmlctIlreparametersonconcretestrainarediscussedThenu

6、mericalresultsindicatedthatdifferentaggregateareapercentageandaggregatemaximumsizewillhavegreatinfluenceonstrainresultsThirdly，forthecompressiontestofconcrete，experimentofDICandnumericalsimulationareemployedtoanalyzethes

7、trainofconcreteWepo硫outthegaugesizefortheconcretestrainmeasurementchoosedifferentlocationsthatlessthanthegaugeandcalculatethecorrespondingaveragestrainvaluesBycomparingthenumericalresults塒tlltheexperimentresults，wegetthe