Increase of the stress from the effective prestress to the stress in the ULS Δσ_p,ULS

For prestressed members with permanently unbonded tendons, it is generally necessary to take the deformation of the whole member into account when calculating the increase of the stress in the prestressing steel. If no detailed calculation is made, it may be assumed that the increase of the stress from the effective prestress to the stress in the ultimate limit state is Δσ_p,ULS.

Recommendation