1261x
003022
2019-10-16

Question

The RF‑CONCRETE Members add-on module is calculating a very high required reinforcement to fulfil the requirements of the SLS checks. Is there any way to avoid such high values for the required reinforcement?


Answer:
It is possible that the module determines a high required reinforcement for SLS checks if it is not possible to fit the provided reinforcement into the cross-section or rather into the reinforcement layer. It is also possible that the deflection analysis leads to a high required reinforcement.

Solution

One solution might be to increase the maximum number of reinforcement layers. With a higher number of reinforcement layers, it is possible to provide a higher reinforcement (Image 01).

For deflection analyses, it another solution might be to disable the automatic increase of the longitudinal reinforcement for the serviceability limit state design and to define a minimum reinforcement (Image 02). In combination with other SLS checks, it could be useful to calculate the deflection analysis in a separate case.

Author

Mr. Langhammer is responsible for development in the area of reinforced concrete structures, and provides technical support to our customers.