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(Solved): For the rod (spring) assemblies shown below, determine the nodal displacements, forces in each elem ...
For the rod (spring) assemblies shown below, determine the nodal displacements, forces in each element, and reaction forces. Use direct stiffness method. Also, verify the stiffness matrix of problem 2) using the minimum potential energy approach (only up to the point of deriving the global stiffness matrix to compare with the direct stiffness approach result).
k_(1)=100l(b)/(i)n,k_(2)=300l(b)/(i)n,k_(3)=200l(b)/(i)n,F=200lb