Pier Stem [SIG]

The Pier Stem is a wall-type connection element between a pier cap (or column) and a foundation. OpenBrIM supports rectangular and oblong stem walls, optional circular variation along the length, and location referencing by either support line or columns.

General

Reference [Support Line/Column]: Selects how the stem wall is positioned. Support Line anchors the stem to a support line; Column attaches the stem to one or more columns.

Support Line: The support line that defines the stem wall location when Reference is Support Line.

Column(s): One or more columns the stem wall is attached to when Reference is Column.

Stem Wall Length: Dimension of the stem wall in the transverse direction (along the support line).

Stem Wall Thickness: Dimension of the stem wall in the longitudinal direction (along the alignment).

Stem Wall Bottom Elevation: Global elevation of the bottom of the stem wall.

Transverse Offset: Offset of the stem wall from the selected support line or column, measured transverse to the alignment. The positive transverse direction in OpenBrIM places positive offsets on the right-hand side when looking upstation along the PGL.

Longitudinal Offset: Offset of the stem wall from the selected support line or column, measured along the alignment.

Section Type [Rectangular/Oblong]: Cross-section shape of the stem wall. Oblong adds semicircular ends to the rectangular core.

Top Elevation Mode [Offset from Alignment/Elevation]: Selects how the top of the stem wall is positioned. Offset from Alignment applies a signed offset from the PGL alignment elevation; Elevation sets a global elevation directly.

Top Elevation Offset from Alignment: Signed offset of the stem top from the alignment elevation. Used when Top Elevation Mode is Offset from Alignment.

Top Elevation: Global elevation of the stem top. Used when Top Elevation Mode is Elevation.

Circular Variation

Is Circular [NO/YES]: When YES, the stem wall is lofted along a circular arc rather than a straight profile.

Radius of Curvature: Radius of the circular arc when Is Circular is YES.

Circle Direction [Concave up/Concave down]: Orientation of the arc when Is Circular is YES.

Circle Segments: Number of discretization segments along the arc when Is Circular is YES.

FEM

GenerateFEM [NO/YES]: When NO, the stem wall is omitted from the finite-element model (3D-only).

Material: Material assigned to the stem wall. Required when GenerateFEM is YES.

Rigid Section: Section used for the rigid links that connect the stem wall FE mesh to adjacent elements.

Mesh Size: Target FE element size on the stem wall surface. Smaller values produce finer meshes.

IFC

Type [IfcBridge/IfcBridgePart/IfcBeam/IfcColumn/IfcSlab/IfcFooting/IfcPile/IfcBearing/IfcReinforcingBar/IfcReinforcingMesh/IfcTendon/IfcMechanicalFastener/IfcAlignment/IfcPositioningElement/IfcKerb/IfcGuardrail/IfcSurfaceFeature/IfcElementAssembly/IfcCableSegment/IfcSensor/IfcDistributionElement/IfcPlate/IfcWall/IfcRail/IfcRoad/IfcDiscreteAccessory/IfcDistributionSystem/IfcMember/IfcBuildingElementProxy]: IFC entity type used on export. Default IfcColumn.

Predefined Type [COLUMN/PIERSTEM/PIERSTEM_SEGMENT/PILASTER/STANDCOLUMN/USERDEFINED/NOTDEFINED]: IFC predefined type attribute. Default PIERSTEM.

Parent [BRIDGE/SUPERSTRUCTURE/DECK/SUBSTRUCTURE/FOUNDATION/APPROACH_STRUCTURE/RETAINING_STRUCTURE]: Parent element in the IFC hierarchy. Default SUBSTRUCTURE.

Quantities

Total Surface Area: Total surface area of the stem wall, including top, bottom, and side faces (Read-only).

Side Surface Area: Surface area of the vertical side faces only (Read-only).

Rebar Density(per cubic yard): Rebar mass per unit concrete volume, used to compute the rebar weight estimate.

Rebar Weight: Stem volume multiplied by Rebar Density (Read-only).

Volume: Computed volume of the stem wall (Read-only).

Weight: Stem volume multiplied by the material density (Read-only).

Material: Name of the assigned material (Read-only).