Member types
Member type influences both structural rules and analysis. These member types are supported:
Beam
The member for which the span is not less than 3 times the overall section depth should be considered as a beam in accordance with 5.3.1(3).
Check that the maximum strain in concrete 3,5‰ can't be reached before reaching the yield strength of reinforcement fyk. The most distant reinforcement from compressive edge of concrete cross-section is considered during this analysis. This analysis ensures, that the concrete crushing can't appear without plastic elongation of the reinforcement. Any collapse of the structure should be preceded by increased deflection and significant cracks in these cases. This analysis is based on limitation of ratio ξ:
where ξ is given by formula
Where is: | x |
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d |
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Maximum value ξlim is calculated using formula
Where is: | Es |
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fyk |
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Slab
The member for which the minimum panel dimension is not less than 5 times the overall slab thickness should be considered as a slab according to 5.3.1(4).
Check that the maximum strain in concrete 3,5‰ can't be reached before reaching the yield strength of reinforcement fyk is performed for this type of member. This analysis is described above.
Column
The members for which the section depth does not exceed 4 times its width and the height is at least 3 times the section depth should be considered as columns in accordance with 5.3.1(7).
Wall
Vertical members, that don't meet requirements for columns shall be considered as walls according to 5.3.1(7).