File:The elastic properties of concrete under bi-axial loading (1912) (14758714746).jpg

Identifier: elasticpropertie00mill (find matches)
Title: The elastic properties of concrete under bi-axial loading
Year: 1912 (1910s)
Authors: Millard, Floyd Hays
Subjects: Concrete Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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since compres-sive deformations ■••ere measured on the surface of the specimen.The deformation on the cross of a compression specimen nas foundto be 0.66 of the deformation oii the arm and the deformation onthe cross of a beam was found to be 0.67 of the deformation onthe arm. The amount of compression carried by the enlargement ofsection as found from the curves showing the distribution ofdeformation was 0.145 of the whole on the crossed beams atthe highest load and was between 0.15 and 0.1c of the whole oncompression specimens for different loads. The derived results from which the shape of section has beeneliminated show that under bi-axial loading with equal loadsin two perpendicular directions the unit deformation is reducedto 80 per cent of the deformation up-der simple loading whendetermined from compression pseclmens and to 78 per cent ofthe deformation under simple loading when determined from crossedbeams. The modulus of elasticity was found to be increased 14 per cer
Text Appearing After Image:
14 G by bi-axial compresGion and 12 per cent by bi-axial bendinc.These values v;ere determined graphically and checlced by aseparate computation. The four agreements mentioned above are in themselvesconclusive evidence that the results are not accidental. Suchclose agreement is quite commonly ladling betv/een series ofexperiments made under identical conditions. A summary of the salient points of the investigation hasbeen prepared in Table XVI, page 147. It explains itself.

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