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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.

Step-by-step moving-load analysis first steps (SAP2000)

See Also