The Structural Engineer > Archive > Volume 31 (1953) > Issues > Issue 8 > The Use of Deformed Steel Bars in Reinforced Concrete
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The Use of Deformed Steel Bars in Reinforced Concrete

In reinforced concrete design it is generally assumed that the strain in the steel reinforcement is equal to the strain in the concrete immediately surrounding it. This is substantially true in zones of compression but, in the parts subject to tension, the working stress in the steel is usually high enough for the strain to be more than the surrounding concrete can withstand without cracking. The size of the cracks formed in this way and their spacing along the reinforcement depends primarily on the bond but is also affected by the strain in the steel, the tensile strength of the concrete and its modulus of elasticity.

Keywords: reinforcement;deformed bars;reinforced concrete;effects;properties;cracks;design;astm a305-50;bond;tests