3D Reference
Pretensioning strands generally applied to the precast segments. In OpenBrIM, to specify the segments creating a Support Line to specify the start and end portions of the segments is beneficial for defining inputs.
Girder: Select the girder that strands are applied. Pretension loads are distributed to the this structure.
Start Support Line: Starting support line for the precast segment.
Offset From Start Support/Insertion Point [ft]: Set the longitudinal offset from the Start Support Line, if applicable.
End Support Line: End support line for the precast segment.
Offset from End Support/Insertion Point [ft]: Set the longitudinal offset from the End Support Line, if applicable.
Strand Row Data: To view the inputs, click the three-dot menu, then select "Edit…". The description of the inputs is listed below.
Tendon Layout Tabular Data |
|
|---|---|
Reference Support Line | Select a reference support line. |
Longitudinal Distance[ft] | Set the station difference along PGL from Reference Support Line. |
Transerverse Offset[ft] | Set the transverse offset according to Section Reference Edge of Girder. |
Vertical Offset[ft] | Set the vertical offset according to Section Reference Edge of Girder. |
Radius[ft] | Set the point’s radius of curve. |
Properties
Material: Set the material for the strand.
Wobble Friction Coefficient [1/ft]: Pretensioning applications doesn’t include frictional losses that’s why this parameter has default zero value.
Curvature Friction Coefficient (1/rad): Pretensioning applications doesn’t include frictional losses that’s why this parameter has default zero value.
Jacking
Strand Type: Enter the strand type for the tendon. The strand type can be imported from the Properties section.
Jacking Method[Start/End/Start then End/ End then Start]: Specify the jacking method that is applied to the tendon. In the case of Girder Strand, start and end refer to downstation and upstation directions with respect to PGL.
Jacking Force From Start [kip]: Enter the start jacking force that is applied to the tendon. It must be specified, unless Jacking Method is selected End.
Jacking Force From End [kip]: End jacking force that is applied to the tendon. It must be specified, unless Jacking Method is selected Start.
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