Shrinkage Prestress Loss Calculator
Account remaining independently established free shrinkage strain AFTER already accounted shrinkage, steel modulus and compatibility fraction; signed over-accounted shrinkage credit retained, distinct from elastic transfer measurement and creep coefficient. Caller establishes calibration and applicability; not design-code compliance or operating safety.
Description
A shrinkage-loss increment depends on the difference between matched and already included strains.
A shrinkage-loss increment depends on the difference between matched and already included strains.1
A negative difference is retained rather than silently counting the same shrinkage again. Use this tool to calculate shrinkage Prestress Loss from the supplied measurements and assumptions.
When to use Shrinkage Prestress Loss Calculator
Use this tool to calculate shrinkage 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 Shrinkage 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 callerMatchedShrinkageStrain, callerAlreadyAccountedShrinkageStrain, 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 |
|---|---|---|---|
| callerMatchedShrinkageStrain | Caller matched shrinkage strain | number | Required |
| prestressingSteelModulusPa | Prestressing steel modulus pa | number | Required |
| callerAlreadyAccountedShrinkageStrain | Caller already accounted shrinkage strain | number | Required |
| callerStageTransferFraction | Caller stage transfer fraction | number | Required |
Enter nonnegative matched shrinkage strain and already included strain, positive modulus and transfer fraction in [0,1]. Return their signed strain difference times modulus and transfer factor. Already-included strain may be larger, giving a negative increment; no zero clipping or strain evolution model is applied.
incrementPa=(matchedStrain−alreadyIncludedStrain)×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": {
"callerMatchedShrinkageStrain": 0.001,
"callerAlreadyAccountedShrinkageStrain": 0,
"prestressingSteelModulusPa": 100000,
"callerStageTransferFraction": 0.5
},
"output": {
"stagePrestressStressLossPa": 50
}
}Limitations and assumptions
A negative difference is retained rather than silently counting the same shrinkage again. 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 Elastic Prestress Loss Calculator for this related task: Elastic-shortening loss relates a measured shortening to a gauge length and modulus.
Use Creep Prestress Loss Calculator when its separate inputs and assumptions fit the question: Creep-related loss combines sustained strain, a creep coefficient and a modulus.
References
-
Shrinkage Prestress Loss Calculator — tool.io
Similar or alternative tools
- Elastic Prestress Loss Calculator
Elastic-shortening loss relates a measured shortening to a gauge length and modulus.
- Creep Prestress Loss Calculator
Creep-related loss combines sustained strain, a creep coefficient and a modulus.