For large or highly finely 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 designmoving-load analysis may become time consuming. While this level of detail may be suitable for final analysis, a series of tips, possibly useful to preliminary design, are available to reduce computational time.

These suggestions are listed as follows:

• Reduce the number of elements members for which response is computed by using "specifying groups smaller than All on the Moving Load Case Results Saved menu (Figure 1), available through 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 lane discretization.

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• Use the Quick Response Calculation option, which uses a limited number of lane-load points to approximate the shape of the influence line. Additional information is available in the CSI Analysis Reference Manual (Moving Load Analysis > Exact and Quick Response Calculation

  ". Please see the "Moving Load Case Results Saved" form below.

Moving Load Case Results Saved form

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See Also

• , page 463).

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Figure 1 - Moving load-case results saved

See Also

• Hardware influence on performance
• Influence-based moving-load analysis implementation