Creep Prestress Loss Calculator
Compute creep prestress loss from independently established sustained-load elastic concrete strain times age/humidity-matched creep coefficient, steel modulus and transfer fraction; not transfer-stage shortening or measured free shrinkage. Caller establishes calibration and applicability; not design-code compliance, safety or a validated forecast.
Description
Creep-related loss combines sustained strain, a creep coefficient and a modulus.
Creep-related loss combines sustained strain, a creep coefficient and a modulus.1
The transfer factor and time-dependent applicability must be supplied independently. Use this tool to calculate creep Prestress Loss from the supplied measurements and assumptions.
When to use Creep Prestress Loss Calculator
Use this tool to calculate creep Prestress Loss from the supplied measurements and assumptions. Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
How to use Creep Prestress Loss Calculator and understand its results
- Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
- Enter callerMatchedSustainedElasticStrain, callerIndependentCreepCoefficient, prestressingSteelModulusPa, callerStageTransferFraction, using the field meanings and rules below, then run the tool.
- Read stagePrestressStressLossPa. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerMatchedSustainedElasticStrain | Caller matched sustained elastic strain | number | Required |
| callerIndependentCreepCoefficient | Caller independent creep coefficient | number | Required |
| prestressingSteelModulusPa | Prestressing steel modulus pa | number | Required |
| callerStageTransferFraction | Caller stage transfer fraction | number | Required |
Enter nonnegative sustained strain and creep coefficient, positive modulus in Pa and transfer fraction in [0,1]. Multiply all terms to return modeled loss in Pa. No time-dependent coefficient selection or stress-history integration is supplied.
lossPa=sustainedStrain×creepCoefficient×modulusPa×transferFraction Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| stagePrestressStressLossPa | Stage Prestress Stress Loss Pa; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"callerMatchedSustainedElasticStrain": 0.001,
"callerIndependentCreepCoefficient": 1,
"prestressingSteelModulusPa": 100000,
"callerStageTransferFraction": 0.5
},
"output": {
"stagePrestressStressLossPa": 50
}
}Limitations and assumptions
The transfer factor and time-dependent applicability must be supplied independently. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use Shrinkage Prestress Loss Calculator for this related task: A shrinkage-loss increment depends on the difference between matched and already included strains.
Use Total Prestress Losses Calculator when its separate inputs and assumptions fit the question: Sequential fractional losses act on the remaining prestress after each stage.
References
-
Creep Prestress Loss Calculator — tool.io
Similar or alternative tools
- Shrinkage Prestress Loss Calculator
A shrinkage-loss increment depends on the difference between matched and already included strains.
- Total Prestress Losses Calculator
Sequential fractional losses act on the remaining prestress after each stage.