Long-term deflection analysis



Stiffness calculation with respect to the non-linear stress-strain relationships in concrete and its reinforcement.
Input of real (practical) reinforcement or use of program-generated reinforcement.
Modification of the calculated required reinforcement area using the multiplication factor when the program generates the amount of required reinforcement for CDD calculations.
The program can calculate the magnitude of concrete creep deformation for selected combinations. It does this twice - once using the standard concrete modulus of elasticity, and once using the effective modulus of elasticity. The difference between the two values is considered as the creep deformation.
Evaluation of total deformation and deformation caused by short-term loading.


Analysis of total, immediate and additional deformations in reinforced-concrete structures including the calculation of long-term stiffness according to national codes.

  • Calculation of deflections based on regulations stipulated in standards.
  • Long-term deflection obtained as a multiple of short-term deflection and creep coefficient.

Two-step process:

  • linear calculation + input of reinforcement (can be calculated automatically) + calculation of cracks and their effect on stiffness.
  • calculation with modified stiffness.

In order to calculate the long-term deflections in concrete, you need to do the following:

  • Define physically non-linear concrete combinations; In fact, this is automated.
  • Run a linear analysis;
  • Input real (practical) reinforcement or have the program calculate the amount of required reinforcement;
  • Run a non-linear analysis using the Concrete - CDD Command;
  • Display and evaluate the linear/CDD results including creep deformation figures.

Long-term deflection (CDD) calculations can be performed according to Eurocode 2 + all supported national annexes.

Long-term deflection analysis Long-term deflection analysis  Long-term deflection analysis

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