Analysis & loading · Frame & beam analysis
Frame analysis (any 2D structure) calculator
Define nodes, members (UB/UC or RC sections), supports and loads for any plane frame, beam or truss. Get bending, shear and axial diagrams, the deflected shape, reactions and AS 4100 utilisation of steel members.
Standard: Direct stiffness method · AS 4100 member checks (UB/UC)
Open the live calculator → All analysis & loading calculators
Inputs in the worked example
The live calculator starts with these values; change any of them and every result, check and diagram updates instantly.
| Input | Value | Unit |
|---|---|---|
| Nodes: x, y (m), one per line | 0, 0 0, 4.5 9, 6 18, 4.5 18, 0 | |
| Members: node i, node j, section, UDL w (kN/m ↓), T for truss | 1, 2, 310UC118, 0 2, 3, 460UB74.6, 8 3, 4, 460UB74.6, 8 4, 5, 310UC118, 0 | |
| Supports: node, fixed | pinned | roller | rollerx | 1, fixed 5, fixed | |
| Nodal loads: node, Fx (→), Fy (↓), M (↺) in kN, kNm | 2, 25, 0, 0 3, 0, 20, 0 | |
| Diagram | Bending moment | |
| Lateral restraint spacing for steel checks (0 = member length) | 3 | m |
| Moment modification factor αm | 1.13 | |
| f′c for RC members (Ec) | 32 | MPa |
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For preliminary design and education. Check every result against the current standard and your own engineering judgement before use.