Ultimate limit state - Foundation block

Longitudinal reinforcement

No reinforcement needed when hf / a >

If the ratio hF / a is greater than the adjusted value, no reinforcement is used.

Default value = 2.0.

Minimum reinforcement ratio r1

Minimal reinforcement ratio.

Default value = 0.005.

Minimum reinforcement only needed hf <

The reinforcement ratio specified above is used ONLY if hF is lower than the input value.

Default value = 500 mm.

Default concrete cover

The default cover size for the foundation block.

Default value = 70 mm.

Apply reinforcement on the upper side

For eccentric foundation blocks, the minimal design moments related to punching assessment cause tension at the upper side of the block. If this option is ON, the minimal reinforcement at the upper surface is taken into account.

Calculation of bending moment

Moment in face of support

Reduced moment

Select the appropriate method for the calculation of the design moment: (i) in face of support – position 1 in the figure, (ii) reduced moment - position 2 in the figure.

image\zakl_patka_vyztuz.gif

Shear punching

if A > 2 hF, Beta 1 =

The definition of punching shear angle Beta 1 (see Fig. above) for the situation when A > 2 hF.

Default value = 33.7°.

if A < 2 hF, Beta 1 =

The definition of punching shear angle Beta 1 (see Fig. above) for the situation when A < 2 hF.

Default value = 45.0°.

Beta V

Coefficient taking account of the punching shear reinforcement in order to determine the shear force capacity.

Default value = 1.0.

Angle alpha reinforcement / foundation plane

The orientation of the punching shear reinforcement.

Default value = 45.0°.

Pyramidal block

k1

Correction coefficient.

Default value = 2.25.

k2

Correction coefficient.

Default value = 1.11.

k3

Correction coefficient.

Default value = 1.34.