QUESTION:

A$-$ Considering the following $7$ steps, write a Matlab program to solve the frame structure shown below:

Step $1$: Data preparation and input.

Step $2$: Computation of element matrices.

Step $3$: Assembly of elements' stiffess matrices and elements' foree vectors in the global

stifiness matrix and global force vector.

Step $4$: Imposition of boundary conditions such as prescribed displacements. This is usually

carried out simulaneously with the assembly of the global matrix in Step $3.$

Step $5$: Solution of the global system of equations for the nodal unknowns.

Step $6$: Computation of secondary variables such as stresses and strains from displacements.

Step $7$; Print und$/$or plot desired results.

AA$=23$

BB$=30$

CC$=57$

DD$=11$