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Determine the global stiffness matrix, the nodal displacements, and the reactions at each node for the bar and spring element assemblage as shown in the

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Determine the global stiffness matrix, the nodal displacements, and the reactions at each node for the bar and spring element assemblage as shown in the figure below. Both element 1 and 2 are bar element and have tensile modulus E=70GPa, cross-sectional area A=2104m2, and length L=2m. Element 3 is a spring element and has spring constant k=2000kN/m

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