The elastic properties of concrete under bi-axial loading . ding tne Instrument at the 1 ime of thetest. All computations checlced some tine afterthey were made, and the computations of points ^7hich seemedirregular, often the points of the entire curve r-ere is felt that the curves shov/ the data exactly as it Y^asobserved. When the irregularity of a point was great it wasoften better to disregard it entirely. In such cases a dottedline is dravm to show the form of the curve used in the furthercomputations and averages. The full lines show the curve as itwas pl
The elastic properties of concrete under bi-axial loading . ding tne Instrument at the 1 ime of thetest. All computations checlced some tine afterthey were made, and the computations of points ^7hich seemedirregular, often the points of the entire curve r-ere is felt that the curves shov/ the data exactly as it Y^asobserved. When the irregularity of a point was great it wasoften better to disregard it entirely. In such cases a dottedline is dravm to show the form of the curve used in the furthercomputations and averages. The full lines show the curve as itwas plotted from the observed data. No attempt has been made to draw smooth curves for eachindividual gauge-line, but straight lines have been drawnbetween the plotted points. The actual variations are shown inthis way. The single stress-deformation diagram for a gauge-line onboth the compression specimens and beams is often not a smoothcurve, but it follows the parabolic form which we would stress-deformation diagra:iiis for the cylinders tested are. OS uniformly smooth curves. An effort to account for this differ-ence led to the conclusioii that the cylinder curve was smoothbecause tlie deformations at various points on its surface -/.eremechanically averaged by the yoXe arrangement which was used intesting such specimens. Deformations on the compressionspecimens and beams measured at several points separatelyand therefore varied with the nature of the concrete at theparticular part of the test piece considered. Any eccentricityof loading in the cylinder was not indicated in the resultir^gcurve because of the averaging device, while an eccentricity ofloading on a compression specimen was shown in the series ofcomputed curves because they gave relations at particularpoints on the surface of the specimen. It would seem probable that failure in a concrete compressionpiece occurs progressively, that is to say, first one pointbecomes deformed to its ultimate and yields
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
