FREW

Frew Features - Advanced Analysis Options - Modelling Axi-Symmetric Problems

Stressing an anchor may be modeled by specifying a strut with a pre-stress force equal to the stressing force and a zero stiffness. The stiffness of zero would maintain a constant force at the point of application throughout the analysis.

In subsequent stages after the anchor is 'locked off' it is usually convenient to remove this strut and insert a strut that models both the pre-stress and stiffness of the anchor

Inclined anchors are modeled by specifying an inclination to the horizontal and if they are not applied at the vertical axis of the wall a lever arm can be specified to allow for this.