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nameInsertionPoint

TypicallyIn OpenBrIM, insertion points are used to model bearing locations, therefore, it is recommended to have one insertion point for each bearing.

Location: Select the support lines

Longitudinal Offset [ft]: Longitudinal offset along the PGL (Projected Grade Line) from the support line.

Transverse Offset [ft]: Transverse Offset from the PGL. When the transverse offset of the support line is non-zero, the entered value will be added to the transverse offset of the support line, resulting in the summation being used as the transverse offset along the PGL for the insertion pointdefine the girder layouts and locations of bearings.

Bridge Parameters

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. A value of 0 indicates the center of the support line associated with the location definition of the insertion point. A positive value indicates an offset towards the right when looking upstation along the PGL, while a negative value indicates an offset towards the left.

Info

The positive direction of the Y-axis will be to the left when looking upstation 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 upstation 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.