A stepped bar is clamped at one end and subjected to concentrated forces as shown.
Assume:
a. Write the element stiffness matrices of elements 1 and 2 showing the row addresses.
b. Assemble the above element stiffness matrices to obtain the following structural level equations in the form
c. Delete the rows and columns corresponding to zero DOFs to obtain the global equations in the form of
d. Determine the displacements and element forces.
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