1. Description
This component operates the Approximate Tendon Losses(PCI Bridge Design Manual 04) function in Civil NX.
Tendon losses are approximated without considering time dependent properties in detail through construction stage analysis. This approximate method is generally used for preliminary design. The program calculates approximate tendon losses separating into instantaneous losses and time dependent losses. Instantaneous losses include losses due to friction, anchorage slip and elastic shortening. Time dependent losses include creep, shrinkage and relaxation. In case of Lump Sum Estimate Method, losses due to creep, shrinkage and relaxation are combined into single values, which are produced under the creep/shrinkage loss column.
The Approximate Tendon Losses(PCI Bridge Design Manual 04) function can be found in the Civil NX main menu,select
[Load] Tab > [Prestress] Tab > [Prestress Loads] Group > [Approximate Tendon Losses] Menu
2. Grasshopper Path
[Midas] > [Prestress] > [Approximate Tendon Losses]
Estimation Method 1 : Rational Approximate Method
3. Component Image
4. Input/Output Value
- Input Data
| Index | Name | Description | Type | Default |
Previous |
|---|---|---|---|---|---|
| 1 | vTENDON LCNAME |
Tendon Load Case Name | String | - | - |
| 2 | vDEAD LCNAME |
Dead Load Case(Self Weight) Name | String | - | - |
| 3 | vADD LCNAME |
Additionnal Dead Load Case(Superimposed Load) Name | String | - | - |
| 4 | HUMIDITY _PCI |
Ambient Relative Humidity | Real | - | - |
| 5 | RELAXCOEFF _PCI * |
Relaxation Coefficient | Real | - | - |
| 6 | RELAXADJUST _PCI ** |
Relaxation Adjustment for Low-Relaxation Strand | Real | - | - |
| 7 | RELAXAGE _PCI |
Age of Relaxation Calculation | Real | - | - |
| 8 | Relaxation Coefficient Option | Select | Active | - | |
| 9 | Relaxation Adjustment for Low Relaxation Strand Option | Select | Active | - | |
Activation Condition
* Only for if Relaxation Coefficient Option is Active
** Only for if Relaxation Adjustment for Low Relaxation Strand Option is Active
- Output Data
| Index | Command | Description | Type | Method |
Next |
|---|---|---|---|---|---|
| 1 | AETL | Create Approximate Tendon Losses(PCI Bridge Design Manual 04) - Rational Approximate Method | Json | PUT/DELETE | - |
Estimation Method 2 : Lump Sum Estimate Method
3. Component Image
4. Input/Output Value
- Input Data
| Index | Name | Description | Type | Default |
Previous |
|---|---|---|---|---|---|
| 1 | vTENDON LCNAME |
Tendon Load Case Name | String | - | - |
| 2 | vDEAD LCNAME |
Dead Load Case(Self Weight) Name | String | - | - |
| 3 | vADD LCNAME |
Additionnal Dead Load Case(Superimposed Load) Name | String | - | - |
| 2 | PRATIO _AST |
Partial Prestress Ratio | Real | - | - |
| 3 | SPECSTRENGTH _AST |
Specified Compressive Strength of Concrete(f'c) | Real | - | - |
| 5 | Tendon Type | Select | Wire or Strand | - | |
| 5 | Type of Beam Section | Select | Rectangular Beams and Solid Slabs | - | |
| 6 |
Level |
Select | Average | - | |
| 7 | Structural Low-density Concrete | Select | Active | - | |
- Output Data
| Index | Command | Description | Type | Method |
Next |
|---|---|---|---|---|---|
| 1 | AETL | Create Approximate Tendon Losses(PCI Bridge Design Manual 04) - Lump Sum Estimate Method | Json | PUT/DELETE | - |
5. Reference API Manual Link
Approximate Tendon Losses