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Материалы, коэффициенты, обозначения

The following notation for material parameters is used:

f 'c

-

characteristic compressive cylinder strength of concrete at 28 days

Ec

-

mean value of the modulus of elasticity of concrete at 28 days

f 'ct,f

-

characteristic flexural tensile strength of concrete

f 'ct

-

characteristic principal tensile strength of concrete

fsy

-

yield strength of reinforcing steel

The characteristic compressive strength of concrete is the basic input parameter given by the class of concrete.

The most common notation for geometrical parameters:

b

-

cross-section width

D

-

cross-section depth

d

-

effective depth of cross-section

z

-

lever arm (arm of internal forces)

All computations are carried out according to the theory of limit states.

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