The elastic properties of concrete under bi-axial loading . cross of a crossed beam is of the unitdeformation on the arm. Acceptir^ the result derived above that the enlarged sectionalone would reduce the deformation to of that on the arm, we have that the effect of the two compressions rhen the shapeof the test piece is eliminated is to reduce the deformationto or of that on the arm. We may then say thatthe unit deformation of a portion of concrete sub;iected to twoequal bending stresses at right angles is reduced to 78 per cent of the unit deformation which v/ould
The elastic properties of concrete under bi-axial loading . cross of a crossed beam is of the unitdeformation on the arm. Acceptir^ the result derived above that the enlarged sectionalone would reduce the deformation to of that on the arm, we have that the effect of the two compressions rhen the shapeof the test piece is eliminated is to reduce the deformationto or of that on the arm. We may then say thatthe unit deformation of a portion of concrete sub;iected to twoequal bending stresses at right angles is reduced to 78 per cent of the unit deformation which v/ould occur by the action of one of these stresses. Modulus of Elasticity. Tlie relation of the apparent modulus of elasticity on the cross to the modulus of elasticity on the arm is very much the same as the relation between similar quantities found on the compression specimens. See the summary sheet of Table XVI on page 147. The modulus on the cross of 2001 is 2 760 000, or times the modulus of 2 100 000 on the arm. The modulus on the cross of. Table XII Crossed Beanna (, ZOOE, a003. 3\unnr)ncxr-y of Ratios of Deforrr-»atioo on theCross fo Defomnafiori oo the Arm. Unit5t ress Defbmnation on CrossDefornnation on Arm :p r\ 1 2 O 03 /av© rag e 1600 I600 MOO .65 .5A .60 .65 .55 • 7Z .e>4 lOOO .66 -56 .77 .66 aoo .ri .56 .SO .63 aoo .71 .56 .70 AOO .73 .69 .73 z oo .75 .57 .75 Average .69 .56 .8Z .67
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
