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Materials, Coefficients, Notation

The following notation for material parameters is used:

fck

-

characteristic value of cylindrical compressive strength of concrete

fcd

-

design compressive strength of concrete

fctm

average value of tensile strength of concrete

fctd

-

design axial tensile strength of concrete

fyk

-

characteristic tension strength of steel bar

fyd

-

design tension strength of steel bar

The characteristic compressive strength of concrete is the basic input parameter given by the class of concrete - it serves to derive the remaining coefficients of reliability (Ch. 8.2).

for fck 50 MPa

for fck > 50 MPa

for fck 50 MPa

for fck > 50 MPa

The most common notation for geometrical parameters:

b

-

cross-section width

h

-

cross-section depth

d

-

effective depth of cross section

z

-

lever arm (arm of internal forces)

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