Stiffness Matrix and Equations

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Stiffness Matrix and Equations
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Stiffness Matrix
Note units on kij terms. Derived from direct
stiffness approach. Identical to matrix methods!
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Assemble Element Equations to Obtain the Global
Equations and Introduce Boundary Conditions
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Example
y
1000 lbft
1
3
x
2
2
1
1000 lb
E, I are constant through out the beam
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Solve for nodal displacements and reactions at
node 1 and node 3.