(Answered) Question the element stiffness matrices for vertical and

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Question: The element stiffness matrices for vertical and horizontal elements of a plane frame have already been computed and assembled into a 9 x 9 global matrix as follows:

It is decided to brace the frame by an inclined truss member as shown in Figure 4.77. Write down the stiffness matrix for the inclined truss member. Assemble it into the global matrix. Determine nodal displacements due to a downward concentrated load

of P =50 kN applied at the corner. For all members, E =210 GPa, I = 10^-4 m⁴, and A =10^-2 m².

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