1. Description
This component operates the Approximate Tendon Losses(AASHITO-LRFD 06) 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(AASHITO-LRFD 06) 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 | HUMIDITY _AST |
Ambient Relative Humidity | Real | - | - |
| 3 | INITSTRENGTH _AST |
Copressive Strength of Concrete at time of Initial Loading (f'ci) | Real | - | - |
| 4 | RELAXATIONLOSS _AST * |
Relaxation Loss | Real | - | - |
| 5 | Tendon Type (Only Relaxtion Type is Per Code) |
Select | Low-relaxation Strand | - | |
| 6 | Relaxation | Select | Per Code | - | |
Activation Condition
* Only for if Relaxtion is User Defined
- Output Data
| Index | Command | Description | Type | Method |
Next |
|---|---|---|---|---|---|
| 1 | AETL | Create Approximate Tendon Losses(AASHITO-LRFD 06) - 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 | 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(AASHITO-LRFD 06) - Lump Sum Estimate Method | Json | PUT/DELETE | - |
5. Reference API Manual Link
Approximate Tendon Losses