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Vehicle live loads may be created manually or selected from a list of standard specifications. Moving-load analysis may then be selected as the load case which implements one of the following methods:
Influence-based enveloping analysis, in which vehicles, oriented in either direction, are automatically positioned within each lane to induce maximum and minimum response throughout the structure.
Step-by-step analysis, in which vehicles travel along the roadway, each with its own start time and position, direction, and speed. This step-by-step procedure may couple with time-history analysis and nonlinear behavior, and may be useful for special studies or unusual permit vehicles.
Additional information is available in the CSI Analysis Reference Manual (Lanes, page 436).
Tips
As described in the Lane-to-object connection article, users may control which superstructure objects are subjected to lane loading.
See Also
Layout line article
Moving-load analysis section
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