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An interactive, browser-based calculation sheet for matrix structural analysis.

  • Direct matrix inputs for 2D trusses, beams, and frames.
  • Instant client-side solving without server installation.
  • Step-by-step intermediate results for learning purposes.

Bar structures

Node x y
Element i j EA EI Type
Bc dx dy r
Nodal force Fx Fy M
Elmt force qx qy Px d1 Py d2 M d3
Analysis Output Selection
Degrees of freedom with boundary conditions
Degrees of freedom of elements
Stiffness in local coordinates
Stiffness in global coordinates
Boundary conditions of elements
Apply boundary condition to global stiffness
Structure stiffness with bcs
Fixed ill-condition
Non-zero degrees of freedom of structure
Nodal forces in global coordinates
Element forces in local coordinates
Element forces in global coordinates
Structural equivalent forces in global coordinates
Structural forces
Structural displacements
Nodal displacements
Element displacements in global coordinates
Element displacements in local coordinates
Internal forces

Results

Elasticity

Node x y
Element i j k E nu t type
Bc dx dy
Nodal force Fx Fy
Elmt force qx qy
Analysis Output Selection
Degrees of freedom with boundary conditions
Degrees of freedom of elements
Stiffness in local & global coordinates
Boundary conditions of elements
Apply boundary condition to global stiffness
Structure stiffness with bcs
Fixed ill-condition
Non-zero degrees of freedom of structure
Nodal forces in global coordinates
Element forces in local & global coordinates
Structural equivalent forces in global coordinates
Structural forces
Nodal displacements
Element displacements in local and global coordinates
Reaction forces
Element strain
Element stress
Internal force per unit length

Results

scale