Support Lines [SIG]
- Zeynep Bayam
- Melis Ceylan
- Umut Nuhat Sevinc
In OpenBrIM, "Support Lines" is the term used to describe the locations of abutments and piers in plan view. These lines are typically placed at the centerline of piers and the front face of backwalls for abutments, and are also used to determine the extents of the deck and beams.
Bridge Parameters
It is necessary to create a single support line for each abutment and pier location.
Bridge: Since OpenBrIM allows for the modeling of multiple bridges, you should specify the bridge on which the support line will be placed using this parameter.
Station: The station of the support line can be defined using this parameter. The generation of the support line with respect to the station is based on PGL (Proposed Grade Line).
Skew Angle: This parameter can be used to define the skew angle of the support line. See the screenshot below for a description of positive and negative skew angles.
Transverse Offset: This parameter specifies the offset value of the support lines in a direction perpendicular to the PGL. A value of zero indicates that the center point of a support line is located at the PGL. Positive values offset the center of the support line towards the right when looking upstation along the PGL. Refer to the screenshot below for the directions of positive and negative transverse offsets.
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).
3D Visual
Support Line Width: This parameter can be used to adjust the width of the support line in the transverse direction.
Show/Hide [Show/Hide]: This parameter is used to toggle the object in 3D view.
Label: This parameter can be used to change the name of the object in 3D view.