Arbitrary Polygon [SIG]

Surface

A typical quadrilateral surface is generally suitable for various loading geometries, as it can define different transverse offsets for start and end stations. However, for other shapes such as an L-shaped loading, as illustrated in the example below, this particular object is more appropriate.

Bridge: By selecting the bridge object, the component will be able to identify the correct finite elements to use.

Reference Point Station: This station serves as the reference point for defining surface points, which will utilize it to calculate their final positions.

Reference Point Transverse Offset: This transverse offset as the reference point for defining surface points, which will utilize it to calculate their final positions.

Surface Points: Utilize the edit menu to specify surface points.

Open

• Longitudinal Distance from Reference Point: Additional longitudinal station along the PGL from the reference point.

• Transverse Offset from Reference Point: Additional transverse offset perpendicular to PGL from the reference point.

Rotation: The rotation parameter is employed to rotate the polygon around its centroid.

Open

Surface Points

Graphics

This component serves solely for graphical representation to determine the elevation of the loading representation and has no impact on loading computations.

Reference Elevation: Elevation on the coordinate system where you wish to create a graphical loading surface.

Elevation Coordinate System [Alignment/Global]: The Elevation Coordinate System is typically your alignment. However, if you have more than one alignment, please select the one you wish to use and input the elevation accordingly