A treatise on concrete, plain and reinforced : materials, construction, and design of concrete and reinforced concrete; 2nd ed. . te, and, from his general formulas, deduced formulasapplying to circular slabs free on their outer edge and clamped round thecolumn. In this analysis the effect of lateral stresses has been taken intoaccount, this being expressed by Poissons ratio, which is the ratio of thelateral deformation to that in the direction of stress. Very few tests havebeen made to determine the value of Poissons ratio, and the results ob- ^ tained vary considerably. Many of the earlier t
A treatise on concrete, plain and reinforced : materials, construction, and design of concrete and reinforced concrete; 2nd ed. . te, and, from his general formulas, deduced formulasapplying to circular slabs free on their outer edge and clamped round thecolumn. In this analysis the effect of lateral stresses has been taken intoaccount, this being expressed by Poissons ratio, which is the ratio of thelateral deformation to that in the direction of stress. Very few tests havebeen made to determine the value of Poissons ratio, and the results ob- ^ tained vary considerably. Many of the earlier tests giveas high as , but, sincesome of the best experimentsin our American colleges in-dicate a value ranging, withconcrete of different propor-tions and strength, from , the ratio of isrecommended for use withconcrete where the correctvalue is unknown, as beingundoubtedly safe for con-crete of 1:2:4 must be noted that the in-crease of Poissons ratio tendsto diminish the deflection andthus decrease the stress. Ahigh Poissons ratio thereforemeans a thinner slab andless steel. / / /I\ \ , A/. > Assumed line ofnidximiim bending i1 ; moment \ / ^ ^ .Theoretical line \Column head /Y ofJnflection_ \
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1912
