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CDD/PGNL parameters

Two different types of physical nonlinear calculation (material nonlinearity) are available:

CDD

Divide members in parts

The number of intervals the beam is divided to during the physically nonlinear calculation of deformations.

This value overrides the division adjusted in the mesh setup dialogue, but is used ONLY for the calculation of physically nonlinear deformations.

Deformation: Max. displacement of beam

Maximal deflection of a beam for the serviceability limit state (defined relatively to the length of the beam).

Deformation: Max. displacement of plate

Maximal deflection of a slab for the serviceability limit state (the absolute value).

PGNL

Calculation of nonlinear stiffness for nonlinear calculation

The default setting determining if the physically nonlinear behaviour should be taken into account in order to calculate internal forces.

Convergence criterion of the calculation

The precision (in percentages) of the iteration method.

General

Coefficient for reinforcement

(amount of reinforcement can be increased for the CDD and PGNL calculation)

If the PNL calculation is performed for the Required As, the user may modify the amount of calculated reinforcement by multiplying it by this coefficient.
 

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