Function
- Determine the type of the cross-section and the position of columns or bearings in the transverse direction.
Call
From the main menu, select [Structure] tab > [Wizard] group > [PSC Box Bridge] > [Grillage Model]
Input
Grillage Model Transverse dialog box
Pavement and Barrier
Type
Select the type of the cross-section for sidewalk, pavement, barrier and median strip.
Slab Width
The width of top slab of the cross-section selected from the Section tab.
The sum of Slab Width and b1b7 must be equal. If there is a difference, errors may occur in the load input section.
Bearing / Column Default Spacing
Auto Calc
The values of D and Spacing for abutments and bent-caps are automatically calculated such that bearings or columns are located at the centroids of all longitudinal girders.
Bearing Location at Abutment
Enter the position of bearings for the abutments. It is activated when the Bearing Type or Hybrid Type is selected as a boundary condition on the Layout tab.
D
Distance from the center line of the bridge to the center of the most exterior bearing on the (+)Y direction.
Spacing
Specify the spacing of bearings sequentially on the (+)Y direction.
Same as the Begin
Apply the same condition to the abutment at the end point of the bridge as the start point.
Bent Cap
Column
When Integral Type is selected on the Layout tab:
D : Distance from the center line of the bridge to the center of the most exterior column on the (+)Y direction.
Spacing : Specify the spacing of columns sequentially on the (+)Y direction.
Bearing
When Bearing Type is selected on the Layout tab:
D : Distance from the center line of the bridge to the center of the most exterior bearing on the (+)Y direction.
Spacing : Specify the spacing of bearings sequentially on the (+)Y direction.
User Define Bent-Cap Section : The section for bent cap can be defined by the user. If this option is not used, rectangular section is applied based on the width of bent cap and the height of adjacent Girder.
Copy the Current Bent Cap Data To : Apply the current Bent Cap data to other bent caps.
Transversely Fixed Position
This option is activated only when Bearing Type is selected on the Layout tab. Longitudinally and transversely fixed bearing is used as a reference point for the determination of the direction of free bearings in case of the 'In Line with Fixed Support' option on the Layout tab.
Longitudinally Fixed Position
The position of longitudinally fixed support is shown, which is set up on the Layout tab.
Transversely Fixed Position
Select the transversely fixed bearing.