Column Axial Stress
Compute axial compressive stress σ of a column from axial load P and area A.
Inputs
Formula
σ = P/A
Slender columns also need stability checks.
Fundamentals
Compute axial compressive stress σ of a column from axial load P and area A.
This tool computes Column Axial Stress from the formula: σ = P/A
History
Soil and structural mechanics were systematised in the 19th century, supporting modern civil design.
Engineering applications
Used for retaining, foundation and structural member design.
Glossary
| Axial load P | Input parameter |
| Area A | Input parameter |
| Compressive stress σ | Output result |
How to use
- Fill in Axial load P, Area A in the Inputs section (watch the unit on each field).
- Click Calculate; the tool evaluates the formula shown above.
- Read Compressive stress σ in the results area.
Formula · Worked Example · Knowledge
Formula
核心计算关系：σ = P/A
输入变量：
- Axial load P
P— kN - Area A
A— mm²
输出结果：
- Compressive stress σ
sigma— MPa
假设/适用：Earth pressure uses Rankine/Coulomb active assumptions; passive & surcharge handled separately.
Worked Example
根据公式 σ = P/A，取 Axial load P = 500 kN；Area A = 40,000 mm²。
代入计算得：Compressive stress σ = 12.5 MPa。
Key Points
- Earth pressure uses Rankine/Coulomb active assumptions; passive & surcharge handled separately.
- Check both strength and stability (overturning, sliding).
- Support reactions from static equilibrium; continuous structures need force/displacement method.
Parameters
Inputs
| Parameter | Symbol | Unit | Default |
|---|---|---|---|
| Axial load P (kN) | P | kN | 500 |
| Area A (mm²) | A | mm² | 40000 |
Outputs
| Result | Symbol | Unit |
|---|---|---|
| Compressive stress σ | sigma | MPa |
Applications
- Simply-supported/cantilever reactions
- Structural equilibrium analysis
- Shear & moment distribution
FAQ
What formula does this tool use?
This tool computes per ISO / AGMA / ASME standard formulas: σ = P/A
How accurate are the results?
Results match input precision, based on SI units and common engineering approximations; for critical duty re-check with a safety factor.
Where is it used?
Simply-supported/cantilever reactions