This dialog is used to define the variation for a girder(s) particular set of parameters within a span.
| Setting | Description |
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Span
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Span Selection can be used to select one of the available spans for girder variation definition. |
| Girder tabs |
Displays the set of section parameters for each girder within current span. The variation of any parameter is set using a variation object selected on Variation column. If needed, the defined variation for a parameter can be taken as reversed or not using option on Mirrored column. |
| Same as span selection |
Used to copy the variation from another span to current one. There are 3 different ways to achieve the copying: Plain, Mirrored, Doubly mirrored. | Setting | Description |
|---|
| Plain |
Allows copying the variation from source span into destination exactly the way it was defined in source span. |
| Mirrored |
Allows copying the variation from source to destination span, by mirroring its values first. |
| Doubly Mirrored |
Allows copying the variation from source to destination span, by mirroring its values first and then applying to destination girder in reverse order. |
|
| Same as girder selection |
Used to copy the set of variations of parameter(s) from a source to destination girder, within current span only. |
Variations definition
Into this dialog the actual variation of a parameter is made, creating a profile in a similar way like for cross frame/stiffeners definition.
On the top of the dialog there are two options in order to selected profile type (Variation type: slope, length) and name (Variation name).
| Setting | Description |
|---|
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Variation Table
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Consists of a set of a set of expressions for abscissa and ordinate shown in the right side of this table. These expressions are arithmetical terms of constants and defined formulas. The variation between two points of the table can be entered:
- Constant The ordinate of the table do not vary to the next point.
- inear The ordinate of the table varies linearly to next point.
- Parabolic variation of type 0 The ordinate of the table varies parabolically to the next point. The slope of the curve at the beginning and at the end is set to 0.0.
- Parabolic variation of type 1 The ordinate of the table varies parabolically to the next point. The slope of the curve at the beginning is set to 0.0.
- Parabolic variation of type 2 The ordinate of the table varies parabolically to the next point. The slope of the curve at the end is set to 0.0.
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Insert/delete
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These options, just below the table will help you introduce or remove lines from the table. |
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Mirror
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This option will automatically mirror the stations and the interpolation type. |
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Reference span/reference
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This length helps you to visualize the variation on a specific span or distance. |
After the variation is done you can add, delete, or modify an item in the right side Variations list using the buttons situated on the bottom part of the screen in order to meet the project needs. Mention that each variation name (ID) can’t be added twice into list of available profiles in order to avoid inconsistencies. Moreover, once added into list, the name of profile can’t be modified.
