Calculation of Stiffness in Structural elements

1.

Given that the degree of freedom is 3.

The elements ki1 in the first column, we determine the stiffness matrix by imposing u1=1 , with u2=u3=0.

The elements ki2 in the second column, we determine the stiffness matrix by imposing u2=1, with u1=u3=0.

The elements in ki3 in the third column, we determine the stiffness by imposing u3=1, with u1=u2=0.

2.

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3.

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