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nameInsertionPoint

In OpenBrIM, insertion points are used to define the girder layouts and locations of bearings.

Bridge Parameters

Insertion Points should be defined to determine the girder layouts and to model bearing locations. Generally, it is recommended to have one insertion point for each bearing.

Location: When you click on the location cell and then on the appearing three dots, the options 'Set to … (Support Lines created)' or 'Select' should be visible. A previously defined support line should be used to define the locations of insertion points.

Longitudinal Offset: The longitudinal offset refers to the offset value along the direction of PGL (Proposed Grade Line).

Transverse Offset: The transverse offset refers to the offset value along the support line. If a transverse offset value is entered for the support line, the 0 point will be the center of the support line, not the PGL.

Info

The positive direction of the Y-axis will be to the left when looking upstream along the PGL. However, based on the requests of engineers who have been using OpenBrIM for their bridge projects, positive transverse offset values will indicate the right-hand side when looking upstream along the PGL. This distinction should be taken into account when defining the location of bridge elements using transverse offset values (where positive transverse offset indicates the right side), as well as when making definitions related to FEM and loading (where positive Fy indicates the left side along the PGL).

When working with a support line that has a skew angle greater than 0 in OpenBrIM, it is important for users to specify the transverse offset(T) along the support line, not along the PGL(Y). This is demonstrated in the figure below.

If a support line has a skew angle greater than 0 and longitudinal offsets greater than 0 are being used, then the longitudinal offset parameter is applied perpendicular to the support line.

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Station on PGL (readonly): Displays the station of the insertion point along the PGL.

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