(Solved): ( 25 pts ) Determine the global stiffness matrix for the entire frame structure. Then, using the st ...

( 25 pts ) Determine the global stiffness matrix for the entire frame structure. Then, using the stiffness matrix method, calculate the displacement at joint 2 and determine all unknown support reactions. The near-end and far-end joints of each member are indicated by direction arrows, and the degree of freedom (DOF) codes for the horizontal, vertical, and rotational directions are labeled in the figure.