- This is a feature that reduces the design bending moment at internal points of a continuous girder bridge. The formula for calculating the design bending moment at internal points is as follows.
M1: Design bending moment at the interior support
M : Bending moment at the interior support
w = R/a
R : Reaction at the interior support
a : Dispersal width of reaction through a girder at the level of the centroid of the girder.
Design bending moment at the interior support
From main menu, select [Results] tab > [Type : Analysis result] > [Detail Result] group > [Set Reduction Moment]
Select the load cases for which moment at the interior support is reduced.
Continuous girder group
Select the girder group in which the girders with the interior supports are included. A group can be defined by clicking ... and creating a Structure Group.
Inner support point
Distribution width for reduction
Enter the dispersal width, a.
Calculated by the program.
User directly enters the dispersal width.
Enter node numbers corresponding to the interior supports. The node list can be entered by selecting the nodes in the model view or typing the node numbers.
Add/replace or delete a set of the dispersal widths and associated nodes.