RC Desgin of Box girder


Hello,
What is the meaning of this warning. I have analyzed box girder of bridge with tendons and reinforcement it is showing this warning at only two sections in box design report. The relative capacity of section is showing more than 1 then how its showing this warning.

Hello,

the warning indicates that no reinforcement of the cross section is marked as acting for torsion. This information has to be defined at the corresponding reinforcement of the cross section. For a box girder the reinforcement which is torsional active lies normally around the box. The information has to be input with the program AQUA records for the reinforcements item TORS (default is not active) or in the Cross Section Editor in the dialogs for the reinforcement → ‘Torsional contribution’.
Please note, that not the complete reinforcement of a cross section acts normally for torsion. The definition has to be in such that the Bredt area is generated and calculated. Please check graphically the Bredt area after calculating the cross sections in AQUA with the program Results (Result Viewer → System values → Cross sections → Torsional equivalent area (Bredt).

With kind regards
Sabine Fahrendholz
Senior Product Manager


Thanks for the reply. This what its showing in result viewer. So we have to make these longitudinal bars (which are highlighted by thick green rectangle) add to ACTI fully active in torsional contribution? but I have already added them as ADDI partially active in torsional contribution. also what to consider other peripheral longitudinal bars

With kind regards
Sabine Fahrendholz
Senior Product Manager

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