CSiPlnat offers linear and nonlinear time history dynamic analysis using using either modal or direct-integration methods with no practical limit on the number of time history cases or the size of the time history functions. Time history cases can be load sequenced from the end state of a nonlinear time history case or from the end state of a nonlinear static load case.
Modal time history cases typically run faster than direct integration load cases and they are not as sensitive to time step size. Although nonlinear modal time history cases can account for nonlinear boundary conditions (gaps, friction, 1-way supports, etc.), nonlinear modal cases do not account for nonlinear P-delta effects. Modal time history cases can only be load sequenced after another nonlinear modal time history case.
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