|
||
|
|
||
Before calculation of crack width the normal concrete stresses on un-cracked section at the most tensioned fibre has to be checked. If condition below is satisfied, the crack width does not create and the crack width is not calculated
σct ≤ σcr
where
| σct | normal concrete stress on un-cracked section at the most tensioned fibber of concrete cross-section |
| σcr | is value of strength for determination if crack width will be calculated or not, see chapter "Value of strength for calculation of cracking forces" |
There is possible to present cracking forces (Ncr, Mcry, Mcrz) in numerical output. These cracking forces are forces which cause the reaching of value fc,teff (occurring of crack width in cross-section) in the most tensioned fibre of concrete cross-section in direction of first or second principal stress. For calculation of this cracking forces is used condition, that eccentricity of inputted forces and cracking forces has to be the same.