For large or highly discretized models, the influence-based analysis can be very time consuming. You can use the following tips to reduce the computational time, which may be useful especially for preliminary or conceptual design:

Reduce the number of elements for which response is computed by using "Define > Bridge Loads > Bridge Responses" or "Bridge > Bridge Response" menu command by specifying smaller groups than ALL. Please see the "Moving Load Case Results Saved" form below.

Use a coarser Lane Discretization.

You could also use quick method of response calculation for moving load analysis. This method is described in CSI Analysis Reference Manual, chapter "Bridge Analysis", section "Moving Load Response Control > Exact and Quick Response Calculation". Please see the "Moving Load Case Results Saved" form below.

Moving Load Case Results Saved form

Reducing computational time for influence-based moving load analysis

Moving Load Case Results Saved form

See Also