The elastic properties of concrete under bi-axial loading . apparatus. For testir^g compression specimens v/ith arms equallyloaded, the arrangement Y;hich v-as first used on compressionspecimen 2050 (tirro jaclc systems) would have been better thanthe combination of one jaclc and the testing machine if somemeans of Iceeping the jaclcs in their proper positions could havebeen found. A falling off of the load would have affected thetwo arms more nearly equally with two ;jac]cs. However a comparisonof the stress-deformation curves of the horizontal and verticalarms shows that the me+hod of testir


The elastic properties of concrete under bi-axial loading . apparatus. For testir^g compression specimens v/ith arms equallyloaded, the arrangement Y;hich v-as first used on compressionspecimen 2050 (tirro jaclc systems) would have been better thanthe combination of one jaclc and the testing machine if somemeans of Iceeping the jaclcs in their proper positions could havebeen found. A falling off of the load would have affected thetwo arms more nearly equally with two ;jac]cs. However a comparisonof the stress-deformation curves of the horizontal and verticalarms shows that the me+hod of testir^ finally adopted was vevysatisfactory. Three compression specimens in addition to the preliminarytests of 2050, were loaded with equal loa^s on the two arms,and deformations parallel to the axis of each arm both on thecross and on the arm were measured. Expansions on the cross andon the arm were determined by the expansometers, VJlien theresults of the expansion measurements on 2051, 2052 and 2053were computed, it was found that the expansometers had not. 57 worlced satisfactorily on the oross of 2052. Tt70 other corapresGlorspecimens, 2054 and 2059, Yieve then made with the intention oftesting them for expansion only, since it was felt that a knowloicf*of the expansion was important and that conclusions could notbe based on two curves. To investigate the effect on the unit deformation of unequalcompressive stresses in two directions, three specimens v:eretested with half as great horizontal compression as verticalcompression. These were 2051, 2032 and 2053. To determine the effect of the enlarged section at thecross on the unit deformation at the cross, three compressionspecimens .vere loaded on one arm and the same measurements ofdeformation made as were made in the other two cases. The horizontal load was applied with the jack and the verticalload with the testing machine. Ordinarily two men applied load,one with the testirog machine, the other with the pump. Theobserver ru


Size: 1348px × 1854px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912