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The checking of a concrete member can be carried out (among other methods) using the check of cracks.
The calculation of crack width is performed ONLY for the axial force and bending moment My. In addition, the moment My must be in the plane of symmetry of the cross-section.
If either of the two conditions is not met, the program issues a corresponding warning.
The calculation of crack width assumes that the load which the cross-section is subjected to is acting in the XZ-plane (in the local coordinate system) of the beam. The load is assumed to be composed of one bending moment about the local Y-axis of the beam. The analysed section, however, is subjected to two bending moments.
The calculation of crack width assumes that the load which the cross-section is subjected to is acting in the XZ-plane (in the local coordinate system) of the beam. The resultant strain-plane is inclined from the XZ-plane of the bending moment, probably due to asymmetry in reinforcement, due to an opening, etc.
Parameters are analogous to parameters in Checking to interaction diagram.
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w |
value w |
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As |
required area of reinforcement considering the appearance of cracks |
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max distance |
maximal distance between reinforcement bars |
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max diameter |
maximal diameter of reinforcement bars |
Note: The values may differ according to the applied code.
See Drawing setup in chapter Design of beams.
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Calculation info |
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Concrete setup |
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Preview |
Note: This check can be carried out for SLS combination or for a result class with a SLS combination.