Learn to count reactions plus internal hinges. Wang’s classification (external vs. internal redundancy) is still the best.
If you meant deep beam or deep plate analysis:
This is the heart of the early chapters. Wang teaches you to release redundant restraints, calculate displacements, and write compatibility equations. His treatment of Castigliano’s second theorem is particularly praised for its clarity. statically indeterminate structures chu kia wang pdf
A structure is statically indeterminate when the number of unknown reactions and internal forces exceeds the number of independent equilibrium equations (ΣFₓ = 0, ΣFᵧ = 0, ΣM = 0 for 2D; six equations for 3D).
Degree of Indeterminacy = Total unknowns − Number of independent equilibrium equations. Learn to count reactions plus internal hinges
Examples: Continuous beams, fixed-end beams, rigid frames, arches, and trusses with redundant members.
Advantages over determinate structures:
Disadvantages: