RC Crack Width Calculator
Crack-spacing×independently established mean steel/concrete strain contrast; negative closure retained, no universal crack-spacing/code limit. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.
Description
A crack-width model multiplies crack spacing by a relative strain measure.
A crack-width model multiplies crack spacing by a relative strain measure.1
A signed strain difference is a model input rather than an automatically determined physical opening. Use RC Crack Width Calculator to evaluate the supplied inputs under the specific model below.
When to use RC Crack Width Calculator
Use RC Crack Width Calculator to evaluate the supplied inputs under the specific model below. Establish the units, measurement scope and applicable model or recipe assumptions before entering values.
How to use RC Crack Width Calculator and understand its results
- Establish the units, measurement scope and applicable model or recipe assumptions before entering values.
- Enter Caller matched mean crack spacing m, Observed mean steel strain, Caller independent concrete between cracks strain using the field table and validation rules below, then run the tool.
- Read Signed rc crack width m and interpret units, signs, ordering and placeholders as explained below.
- If the tool reports an input error, correct that field and rerun. A successful false result, empty match list or unknown-evidence placeholder has the specific meaning described here; check the limitations before applying the result.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerMatchedMeanCrackSpacingM | Caller matched mean crack spacing m | number | Required; constraints below |
| observedMeanSteelStrain | Observed mean steel strain | number | Required; constraints below |
| callerIndependentConcreteBetweenCracksStrain | Caller independent concrete between cracks strain | number | Required; constraints below |
Enter a positive matched crack spacing in m and finite steel and concrete strains as dimensionless signed values. Multiply spacing by steel strain minus concrete-between-cracks strain. The output remains signed, including negative results; no zero clamp or independently inferred crack spacing is added.
signedCrackWidthM = spacingM×(steelStrain−concreteStrain) Field order, units and branch conditions follow the implementation explanation above.
| Output field | Meaning | Value type |
|---|---|---|
| signedRcCrackWidthM | Signed rc crack width m | number |
{
"input": {
"callerMatchedMeanCrackSpacingM": 0.2,
"observedMeanSteelStrain": 0.001,
"callerIndependentConcreteBetweenCracksStrain": 0.0002
},
"output": {
"signedRcCrackWidthM": 0.00016
}
}Limitations and assumptions
A signed strain difference is a model input rather than an automatically determined physical opening. Apply the exact scope and assumptions described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are stated above; extremely large inputs or outputs can also be rejected. These errors differ from successful results such as false, no matches or unknown evidence.
Alternative or Complementary methods
Use Concrete Shrinkage Crack Control Calculator for a related task: Restrained shrinkage can be compared with a tensile threshold through a reduced elastic stress model.
Use Composite Slab Shear Bond Calculator for a related task: An m-k shear-bond model combines experimentally supplied coefficients with slab geometry.
References
-
RC Crack Width Calculator — tool.io
Similar or alternative tools
- Concrete Shrinkage Crack Control Calculator
Restrained shrinkage can be compared with a tensile threshold through a reduced elastic stress model.
- Composite Slab Shear Bond Calculator
An m-k shear-bond model combines experimentally supplied coefficients with slab geometry.