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Statically Indeterminate Members

A structure is statically indeterminate when the number of unknown reactions or internal forces exceeds the available equilibrium equations.

$$\Sigma F_v,\; \Sigma F_h,\; \Sigma M$$

Steps:

  1. Draw the free-body diagram (FBD) of the structure and apply the static equations of equilibrium.
  2. Formulate additional equations based on deformation relationships (compatibility conditions).
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