GDOT Abutment [STG]

Abutments on OpenBrIM currently have the Generate FEM (Finite Element Model) option set to 'NO'. However, abutments can still be modeled in 3D 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[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.

Bottom Elevation: The elevation of the bottom of the modeled abutment can be specified using this parameter. The elevation data should be defined with respect to the Global Coordinate System, where 0 represents the level of PGL (the vertical elevation data considered). Negative values indicate downward direction, and positive values indicate upward direction.

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: This parameter defines the location of the abutment in the transverse direction (perpendicular to PGL). A value of 0 places the abutment at the center of PGL. Negative values offset the abutment to the left (when looking upstation along PGL), while positive values offset it to the right.

Abutment

Abutment Width: The width of the abutment wall can be specified using this parameter along the transverse direction .For a visual representation, refer to the screenshots below.

Bridge Seat Thickness: The thickness of the abutment wall in the longitudinal direction can be specified using this parameter. For a visual representation, refer to the screenshots below.

Bridge Seat Elevation: The geometry of the bridge seat can be defined using the parameters listed below:

Length: Starting from the right when looking upstation along the PGL, the length in the transverse direction for the bridge seat can be defined by this parameter to further specify its variation.
Elevation: This parameter represents the initial elevation of the bridge seat based on the defined length.
Geometry Option [Flat/Sloped]: The elevation can either remain constant throughout the defined length or vary as a slope.
Elevation 1: For sloped sections, a second elevation value can be defined for the final point of the specified length.

Compute: The compute button automatically draws the bridge seat based on the bearing bottom elevation; if there is no bearing, it draws it based on the insertion point.

Bottom Elevation: The geometry of the bottom of bridge seat can be defined using the parameters listed below:

Length: Starting from the right when looking upstation along the PGL, the length in the transverse direction for the bridge seat can be defined by this parameter to further specify its variation.
Elevation: This parameter represents the initial elevation of the bottom of bridge seat based on the defined length.
Geometry Option [Flat/Sloped]: The elevation can either remain constant throughout the defined length or vary as a slope.
Elevation 1: For sloped sections, a second elevation value can be defined for the final point of the specified length.

Interior Chamfer Width (Transverse): This parameter defines the width of the interior chamfer in the transverse direction. For a visual representation, refer to the screenshots below.

Interior Chamfer Length (Longitudinal): This parameter defines the length of the interior chamfer in the longitudinal direction. For a visual representation, refer to the screenshots below.

Right Wing Wall

Definitions for wing walls located on the right side (when looking upstation along PGL) can be made using the parameters available under this tab. For detailed explanations of each parameter, refer to the related descriptions.

Right Wing Wall Length: The length of the wing wall in the longitudinal direction can be specified using this parameter.

Right Wing Wall Thickness: The thickness of the wing wall in the transverse direction can be defined using this parameter.

Concrete Block Length: The length of the concrete block beneath the wing wall in the longitudinal direction can be defined using this parameter.

Concrete Block Thickness: The thickness of the concrete block beneath the wing wall in the transverse direction can be defined using this parameter.

Concrete Block Height: The height of the concrete block beneath the wing wall in the upward direction can be defined using this parameter.

Back Concrete Block Offset (From start station of the wingwall): The offset from the back of the wing wall to the center of the back concrete block.

Front Concrete Block Offset (From start station of the wingwall): The offset from the front of the wing wall to the center of the front concrete block.

Left Wing Wall

Definitions for wing walls located on the left side (when looking upstation along PGL) can be made using the parameters available under this tab. For detailed explanations of each parameter, refer to the related descriptions.

Left Wing Wall Length: The length of the wing wall in the longitudinal direction can be specified using this parameter.

Left Wing Wall Width: The thickness of the wing wall in the transverse direction can be defined using this parameter.