Midas Civil PSC and prestress loss analysis is the prestressed concrete workflow for tendon force application and loss evaluation in bridge/civil member models.
How It Works
The manual covers prestress loading and losses from anchorage slip, tendon-sheath friction, elastic deformation of concrete, relaxation, and time-dependent concrete behavior. Relaxation models include Magura and CEB-FIP style references. The PSC workflow is tightly coupled to construction stages because tendon stressing, section age, creep, shrinkage, and prestress losses evolve over time.
Solver Development Notes
Tendon geometry and eccentricity must be converted to equivalent nodal/member actions consistently.
Loss calculations need staged state: jack force, anchorage conditions, friction path, concrete elastic shortening, creep, shrinkage, and relaxation.
Result comparison should include tendon force, member force, stress, camber/deflection, and reaction histories.
PSC tests should isolate immediate losses before combining them with long-term losses.
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