a. Assemble the transformation matrix for each of the 3 elements. Clearly label all DOFs on the drawing above.
b. Write the local element stiffness matrix for each element Clearly label all DOFs for each matrix.
c. Compute the global element stiffness matrix for each element. Clearly label all DOFs for each matrix.
d. Write the structure global stiffness matrix. Clearly label all DOFs for the structure global stiffness matrix.
e. Write out the specific matrix equation needed to determine joint 1 displacements.
f. Write out the specific matrix equation needed to determine reactions at joints 2, 3, and 4.
g. Write out the specific matrix equation needed to determine the force in the spring.