---
type: concept
title: "Midas Civil PSC and Prestress Loss Analysis"
created: 2026-06-02
updated: 2026-06-02
address: c-000169
aliases:
  - MIDAS Civil PSC analysis
  - midas Civil prestress loss analysis
tags:
  - concept
  - finite-element-method
  - midas-civil
  - prestress
  - bridge-analysis
status: current
related:
  - "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
  - "[[midas Civil]]"
  - "[[Beam and Frame Finite Elements]]"
  - "[[Midas FEA Embedded Reinforcement Modeling]]"
  - "[[Midas Civil Construction Stage and Time-Dependent Analysis]]"
sources:
  - "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
---

# Midas Civil PSC and Prestress Loss Analysis

## Definition

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.

## Connections

- [[Beam and Frame Finite Elements]] supplies the member-analysis base.
- [[Midas Civil Construction Stage and Time-Dependent Analysis]] supplies the stage/time dependence.
- [[Midas FEA Embedded Reinforcement Modeling]] provides a detail-FE prestress modeling counterpart.