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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. |
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Transverse Tendon Path: This cell is activated when Layout Input Method is selected as Path Data. If Layout Input Method is selected as Tabular Data this cell is displayed as “N/A”.
This definition allows user to define a transerve offset with respect to the reference line of Girder. With the use of this tool curve with different type of variations [None/Linear/Parabola/Circular/Polynomial Fit] can be assigned between points.
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To view the inputs, click the three-dot menu, then select "Edit…". The description of the inputs of both Transverse Tendon Path and Vertical Tendon Path is listed below.
Tendon Layout Transverse/Vertical Path Data | |
|---|---|
Reference Support Line | Select a reference support line. |
Longitudinal Offset Along the PGL[ft] | Set the station difference along PGL from Reference Support Line. |
Transverse Offset/ Vertical Offset[in] | Set the transverse or vertical offset according to Section Reference Edge of Girder. |
Variation Type(from next point) | Set the type of variation between the point in the current row and the point in the next row. |
Curvature Type(for Parabola and Circular) | [Concave Up/Concave Down] Set the curvature type of the variation. This option is applicable to Parabola/Circular variation types. |
Radius(for Circular) | Set the radius of the arc of the circle that is inserted between the point in the current row and the point in the next row. This option is applicable to Circular variation type, only. |
Start Grade (%) (for Polynomial Fit) | Set the initial grade of the fitted polynomial line between the point in the current row and the point in the next row. This option is applicable to Polynomial Fit variation type, only. |
End Grade (%) (for Polynomial Fit) | Set the end grade of the fitted polynomial line between the point in the current row and the point in the next row. This option is applicable to Polynomial Fit variation type, only. |
Local Coord. X Offset [in]: X offset in local coordinates of the selected object.
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Using Local Coord. Offsets would be beneficial when multiple tendons use the same layout definition.
Duct Outer Diameter [in]: Set the outer diameter of tendon duct. This parameter only affects the 3D visualization of tendons.
Properties
Material: Set the material for the tendon.
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Percent Loss(%): Set the percent loss for the long-term losses. This is an optional input. Users can leave this input as 0 and let OpenBrIM calculate the long-term losses using the CEB-FIB 1990 curve by running the time-dependent analysis. Alternatively, users can set an approximate value for the Percent Loss (%) to account for long-term losses, which will reduce the Jacking Force values of the tendon.
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There are two methods for calculating tendon losses in OpenBrIM. The first method, the approximate method, involves defining the Percent Loss (%) of the tendon objects on the FEA tab, as outlined above. The second method, the detailed method, is as follows:
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