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5. DC EC 02: longitudonal reinforcement in beam under pure bending (ULS design)

DC EC 02: longitudonal reinforcement in beam under pure bending (ULS design)

Description (same model as DC EC 01)

Geometry Load Cross-section: Material: C25/30 Concrete cover: Self-weight: Dead loads: neglected at end of span EN 1992-1-1 [- -] and [BE]
How to model a column in Diamonds that can be compared with handcalculations
• According to Eurocode 2, reinforcement is required for the forces in ULS, possibly increased with additional reinforcement to limit the stresses in SLS. It is not known in advance whether additional reinforcement will be required for SLS. Since we are only doing a ULS calculation in this example, we turn off the stress limits in SLS in Diamonds (by making a copy of C25/30 and editing the copy).

Independent reference results

Handcalculation according to EN 1992-1-1 --

Required reinforcement:

Table 3 from Gewapend beton: numeri (click here to open the Table) shows as a function of , and we find:

Minimum reinforcement:

Diamonds calculates the minimum reinforcement with instead of because for more complex cross-section shapes, is not unambiguously defined. Therefor is a safe alternative.

Handcalculation according to EN 1992-1-1 BE

Required reinforcement:

Table 3 from Gewapend beton: numeri (click here to open the Table) shows as a function of .

Minimum reinforcement:

Diamonds calculates the minimum reinforcement with instead of because for more complex cross-section shapes, is not unambiguously defined. Therefor is a safe alternative.

Diamonds results and comparison

According to EN 1992-1-1 [- -]

Longitudonal reinforcement calculated by Diamonds (EN 1992-1-1 [- -])

Results Independent reference Diamonds Difference
Maximum longitudonal reinforcement 765 mm² 768 mm² -0,45%
Minimum longitudonal reinforcement 107 mm² 107 mm² 0,00%

According to EN 1992-1-1 [BE]

Longitudonal reinforcement calculated by Diamonds (EN 1992-1-1 [BE])

Results Independent reference Diamonds Difference
Maximum longitudonal reinforcement 798 mm² 798 mm² 0,00%
Minimum longitudonal reinforcement 107 mm² 107 mm² 0,00%

References

• Tested in Diamonds 2024r01.