Exercise $2$

Consider a planar truss structure shown below.

All elements are solid cylindrical bars. Assume E$=$E and A$=$A for all members.

What is the size of the Global Stiffness Matrix?

Calculate the Element Stiffness Matrices:

Element $1$:

Element $2$:

$3.$ Write down the force and displacement boundary conditions at each node in the matrix format. Note that the value of known parameters should be applied.

$[F]=[AF+RF]=,[D]=$