Step-by-step moving-load analysis is initiated through the following process:

• Define vehicle type through Define > Bridge Loads > Vehicles.

• Define the lane through Define > Bridge Loads > Lanes.

• Select Define > Load Pattern (Figure 1) to define the Type of load pattern Bridge Live. Select Modify Bridge Live Load to define such parameters as lanes, vehicles, vehicle speed, movement direction, etc.

• A multi-step static load case is automatically created. This load case may be reviewed through Define > Load Cases.

• Dynamic response may be evaluated when load-case type is changed from Multi-step Static to Time-history, and analysis type to Nonlinear, Direct-integration. Damping and other parameters may be specified as necessary.

See Also

• CSI Analysis Reference Manual, Chapter "Moving-Load Analysis"