Abutments on OpenBrIM currently have the Generate FEM (Finite Element Model) option set to 'NO'. However, abutments can still be modeled in 3D and 2D with parametric dependencies to closely represent the actual conditions of the bridge.
General
Location: The location can be defined using the support lines previously created, which can be specified with this parameter.
Front/Back: This parameter specifies the orientation of the abutment. It can be used to define the directional placement of abutments, ensuring they align correctly with the overall bridge structure.
Longitudinal Offset: The longitudinal offset value specifies the abutment's position relative to the longitudinal (along PGL) direction. A negative value offsets the abutment in the downstation direction, while a positive value offsets it in the upstation direction.
Transverse Offset: The transverse offset value defines the bridge's location in relation to the abutment. This value should align the abutment's position perpendicular to the Proposed Grade Line (PGL).
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).
Material: This parameter is used to assign a material to the abutment. Materials can be selected from previously defined options under Properties-Materials or imported as needed.
Abutment
Abutment Wall Thickness: The thickness of the abutment wall in the longitudinal direction can be specified using this parameter.
Abutment Wall Width: The width of the abutment wall can be specified using this parameter along the transverse direction.
Abutment Bottom Elevation: The elevation of the bottom of the abutment can be specified using this parameter. The elevation is calculated with respect to the Proposed Grade Line (PGL), where the PGL's elevation is 0. Negative values of elevation indicate a downward direction.
Abutment Height: Based on the elevation data, the height of the abutment is calculated and presented to the user in this column.
Wing Wall
Right Wing Wall Length: The length of the right wing wall in the longitudinal direction (when looking upstation along PGL) can be adjusted using this parameter.
Right Wing Wall Thickness: The thickness of the right wing wall in the transverse direction (when looking upstation along PGL) can be adjusted using this parameter.
Right Wing Wall Angle: The angle of the right wing wall (when looking upstation along PGL) can be defined using this parameter.
Left Wing Wall Length: The length of the left wing wall in the longitudinal direction (when looking upstation along PGL) can be adjusted using this parameter.
Left Wing Wall Thickness: The thickness of the left wing wall in the transverse direction (when looking upstation along PGL) can be adjusted using this parameter.
Left Wing Wall Angle: The angle of the left wing wall (when looking upstation along PGL) can be defined using this parameter.
Closure Pour
Closure Pour Length: The length of the closure pour along the longitudinal direction can be specified using this parameter.
Closure Pour Thickness: The thickness of the closure pour along the vertical direction can be specified using this parameter.
Closure Pour Bottom Chamfer Width: The width of the chamfer on the bottom of the closure pour can be adjusted using this parameter.
Closure Pour Bottom Chamfer Depth: The depth of the chamfer on the bottom of the closure pour can be adjusted using this parameter.
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