Explanation:
Moment distribution method
Force / Compatibility Method |
Displacement / Stiffness Method |
Unknowns - internal member forces or reactions. |
Unknowns - joint displacements |
Compatibility conditions are written. |
Joint equilibrium conditions are written. |
No. of Compatibility conditions needed = No. of redundant forces = Degree of static determinacy |
Joint equilibrium conditions needed = Degree of kinematic determinacy |
Suitable when D_{s} < D_{k} |
Suitable when D_{k} < D_{s}_{ } |
Eg. Strain energy method, Castigliano's theorem, unit load method, virtual work method, column analogy method, three-moment method, flexibility method. |
Eg. Moment distribution method, slope deflection method, kani's method, stiffness matrix method. |