The InfoCAD program system can be used to conduct ultimate limit state and serviceability checks for any 2D and 3D loaded beam or shell structure. Elements with no prestress as well as prestressed elements with subsequent bond, without bond, with external prestressing and in mixed construction can be analyzed.
The reinforced concrete and prestressed concrete design specified in EN 1992-1-1 (Eurocode 2) can be used for buildings and engineering constructions under observance of the following standards
- EN 1992-1-1 as the base document
- DIN EN 1992-1-1 with the National Annex Germany
- OENORM EN 1992-1-1 with the National Annex Austria
- SS EN 1992-1-1 with the National Annex Sweden
Actions, Design Situations
The actions according to EN 1991-1-1 are simply mapped to the load cases by the user. The program then automatically creates the decisive design values for the ultimate limit state and serviceability limit state while considering the safety factors and combination coefficients. For each combination different design situations can be defined for the construction and end states. When conducting the check, the extreme value deriving from all combinations and situations applies. Optionally, the checks can be carried out for all possible combinations of internal forces.
Checks at the ultimate limit state
- Minimum reinforcement against failure without warning
- Bending with or without normal force or normal force only
- Lateral force under consideration of the minimum level of reinforcement
- Pure torsion and torsion with lateral force
- Checks against punching shear
- Checks against fatigue for concrete, bending, lateral force and torsion reinforcement as well as for tendons
Checks at the serviceability limit state
- Limiting the concrete compressive stresses
- Limiting the reinforcing steel stresses
- Limiting the prestressing steel stresses
- Minimum reinforcement for the crack width limitation
- Limiting the crack width via direct calculation
- Decompression check
- Limiting deformations
Ultimate Limit State
The dimensioning of the reinforcement is performed separately on a per checks basis for the modeled design situations. This is determined individually for each combination of internal forces. The final result is derived from the extreme value of all calculated reinforcements.
If required, the checks are carried out in state II under consideration of the calculated maximum reinforcement. In order to attain the required crack width, the minimum reinforcement is increased, if necessary.
The following table demonstrates how the situations are used in the various checks. The numbers refer to the chapters of EN 1992-1-1.
|Permanent & temp.
(on the basis of EN 1992-2:2005, 6.1(110))
|Concrete compressive stresses
Reinforcing steel stresses
Prestressing steel stresses
Crack width, prestressing with immediate bond
|Frequent||Decompression, class XD1-XS3
Crack width, prestressing with bond
|Quasi-permanent||Concrete compressive stresses
Prestressing steel stresses
Decompression, class XC2-XC4
Crack width, reinforced concrete & prestressing without bond
The calculated reinforcement can be output graphically (contours, color gradient, section or numerically) or in table form. This can be selected either for individual checks or for the entire reinforcement. The checks are documented in a detailed log.