Concrete material library
New concrete material library
New material classes were introduced to EN 1992-2. The checks distinguish the material according to code of material. The following classes are implemented now parallel to standard EN concrete material in program. The material classes are marked with appendix (EN 1992-2); see the following figure.
The material mentioned above have the same properties as standard EN concrete with the following changes:
Cement class
Concrete with fck < 50 MPa - S/N/R cement classes are available
Concrete with fck ≥ 50 MPa - only R cement classes is available (due to annex B)
Silica fume
check box YES/NO, it is needed for creep and shrinkage calculation according to Annex B
Safety factor for long term extrapolation of delayed-strains
check box YES/NO, this option was added also to material EN 1992-1-1 due to remarks in chapter B.105 from EN 1992-1-1
Water cement ratio – for Swedish NA only
Value used for the calculation of concrete cover
Coefficient taking account long-term effect on concrete strengths
Design compressive (fcd) and tensile (fctd) stresses are calculated in the same way as for material EN 1992-1-1 but different values of coefficients αcc and αct are used. These values are based on the values according to 3.1.2(101)P and 3.1.2(102)P of EN 1992-2. The NA values are stored in NA Concrete > General > Concrete.
Furthermore, the values are used in calculation of particular concrete strength.
The values for particular NA are mentioned in the following table.
|
NA |
αcc [-] |
αct [-] |
|---|---|---|
|
Standard EN |
0,85 |
1,0 |
|
Irish I.S. NA |
1,0 |
1,0 |
|
British BS NA |
1,0 |
1,0 |
|
French NF NA |
1,0 |
1,0 |
|
Dutch NEN NA |
1,0 |
1,0 |
| Swedish NA | 1.0 | 1.0 |
Minimal and maximal concrete strength
Minimal concrete strength
Settings
New values were introduced according to EN 1992-2 in national annexes based on chapter 3.1.2 (102)P. The minimal value of the characteristic cylinder strength (fck,min) is implemented in national annex – Concrete > General > Concrete.
The following minimal characteristic cylinder strengths are used for particular national annexes.
|
NA |
Value [MPa] |
|---|---|
|
Standard EN |
30 |
|
Irish NA |
25 |
|
French NA |
20 |
|
Greek NA |
30/25 (prestressed / nonprestressed) |
|
Austrian NA |
25 |
| Swedish NA | 25 |
Implementation
When the concrete material with cylinder strength less than required value by code is used in the structure then the following warning is printed. This limitation is done in all concrete checks.
W919 – The minimum value of the characteristic cylinder strength was exceeded.
Maximal concrete strength
Settings
New values were introduced according to EN 1992-2 in national annexes based on chapter 3.1.2 (102)P. The maximal value of the characteristic cylinder strength (fck,max) is implemented in national annex – Concrete > General > Concrete.
The following maximal characteristic cylinder strengths are used for particular national annexes.
|
NA |
Value [MPa] |
|---|---|
|
Standard EN |
70 |
|
French NA |
90 |
|
Greek NA |
50 |
|
Austrian NA |
60 |
| Swedish | 100 |
Implementation
When the concrete material with cylinder strength higher than required value by code is used in the structure then the following warning is printed. This limitation is done in all concrete checks.
W913 – The maximum value of the characteristic cylinder strength was exceeded.