T At xt At B

It is important to note that Equation 3.97 has the matrix form for static load; therefore, some computation algorithms such as Gauss elimination for finite element systems of static case can be applied, and the static and dynamic analysis can share the same computer subroutines [1, pp. 329-332, 855-862].

3.6.3.2 Wilson-0 Method

Wilson-8 method is similar to the linear acceleration method with the assumption that acceleration varies linearly over the time interval 8At where 8 is always greater than 1 and is selected by the analyst to give the desired accuracy and stability. The final form of Wilson's integration has the following form [1, pp. 332-334, 863-870]:

where At8 = 8At, Ax8 is an incremental displacement

0 0

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