The module RF-CONCRETE Members 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 required reinforcement?

Answer

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

Solution

It could be a solution to increase the maximal number of reinforcement layers. With a higher number of reinforcement layers it is possible to provide a higher reinforcement (picture 1).

For deflection analysis it could be a solution to disable the automatically increasing of the longitudinal reinforcement for serviceability limit state design and define a minimal reinforcement (picture 2). In combination with other SLS checks it could be useful to calculate the deflection analysis in a separate case.

Keywords

Serviceability Serviceability Limit state High Large Increase Crack width Deflection

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