Members of structure deform due to external loads. The minimum number of
parameters required to uniquely describe the deformed shape of
structure is called “Degree of Freedom”. Displacements and
rotations at various points in structure are the parameters considered
in describing the deformed shape of a structure. In framed structure the
deformation at joints is first computed and then shape of deformed
structure. Deformation at intermediate points on the structure is
expressed in terms of end deformations. At supports the deformations
corresponding to a reaction is zero. For example hinged support of a
two dimensional system permits only rotation and translation along x and
y directions are zero.
