Analysis of total, immediate and additional deformations in reinforced-concrete frames 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 + calculation of cracks and their effect on stiffness.
- calculation with modified stiffness.
|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.|
In order to calculate CDD in concrete, the user needs to do the following:
- Define physically non-linear concrete combinations;
- 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 option;
- Display and evaluate the linear/CDD results including creep deformation figures.
CDD calculations can be performed according to the following national codes:
- Eurocode 2;
- NEN 6720;
- ČSN/STN 73 1201;
- DIN 1045;
- Önorm B4700;
- BS 8110.