The Tendon load definitions are a series of prestressing cable stressing actions at their ends. For each side, the PT cables (Tendons) can be:
- PRE: prestressed, stressing;
- REL: releasing;
- SWED: slip of the wedge. Sleeve lengths are the covered distances where ducts create a distinct region with unbonded tendons
- DEVL: development length. Development lengths are the transfer zones where prestressing forces grow incrementally from 0 up to when they become fully effective.
To define the side, these Tendon load actions input are then followed by a L/R letter for:
- L - Left side, or;
- R - Right side.
Also, the input action values can be represented by:
- a Total force (kN), or;
- a Factor of SIGP, i.e., a ratio of the force.
A tendon's final instant action results can be visualized in the Normal force diagram button, as shown below.
Stress actions are generally grouped by stress labels that allow for common definitions. The Tendon Load definition is combined with the action Stress in the Schedule Actions and the Tendon geometry defined in Structure > Tendon data and properties to create immediate losses. The total losses need additional Creep & shrinkage calculations and can be derived from final summation loads.
More technical information can be found at the link below and the respective video:
communities.bentley.com/.../psc-bridge-design---rm-bridge-tendons-definition