9.6 APPLICATION OF BOUNDARY CONDITIONS
There are two ways to handle boundary conditions associated with a constrained node.
- Specify a very large number on the diagonal associated with the corresponding displacement component.
- Do not assemble the equation corresponding to the specified displacement component.
The second approach has been discussed next as the same has been employed in program sfeap.
Consider example of two span continuous beam shown in Figure 9.5.
The total DOF for this example are
Specifying the unknowns in this manner is not convenient for computer implementation. Thus, let the DOF be referred to as [r1 r2 r3
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