Statically Indeterminate Members

Question 1

This condition exists in
structures where the reactive forces or the internal
resisting forces over a cross section exceed the
number of independent equations of equilibrium. Such
cases are called _____ and require
the use of additional relations that depend on the
________ in the members.

Answer 1

statically indeterminate ; elastic deformations

Question 2

The cases are
so varied that they can best be described by sample
problems illustrating the following general principles:

Answer 2

1. FBD
2. Apply the equations of static equilibrium
3. Obtain additional equations from the geometric relations between the elastic deformations produced by the loads
4. Draw a sketch that exaggerates the magnitudes of the elastic deformations