Wrapped Concrete, uncoated concrete and reinforcement material models are calculated as specified in TBDY Annex 5A . Concrete wrapping effect can be considered in linear performance analysis. Existing material strengths are used in the calculation of element capacities .
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ICONS
f ck = Concrete characteristic compressive strength
f co = Compressive strength of unwrapped concrete
f yk = Characteristic yield strength ofreinforcement steel
f sy = yield strength of reinforcement steel
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After the concrete compressive strength f co and reinforcement yield strength f sy values are found by using the current material strengths and information level coefficient ( Stress-Strain Relations Curves for Concrete and Reinforcing SteelReinforcement Materials ), the material stress-unit deformation relations are created. The following picture shows the stress strain graphs of concrete and reinforcing steel, respectively.
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