Bridge Truss Analyser — Structural Forces & Deformation

🌉 Bridge Truss Analyser

A Pratt truss is solved using the direct stiffness method (FEM). Each member adds to a global stiffness matrix K; after applying boundary conditions the system Ku=F is solved by Gaussian elimination. Member forces follow from elongations.

Blue = tension Red = compression

🎛 Parameters

Panels N 6 Height ratio h/L 0.35 Applied load (kN) 10 Load node (0 = left) 3

🔭 View

📊 Results

Max tension (kN)

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Max compress (kN)

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Support L (kN)

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Support R (kN)

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Statically determinate: 4N+1 members, 3 BCs, 2×2(N+1) DOF. Forces are independent of member stiffness EA.