Stiffeners
The additional column stiffeners, which increase the bearing resistance in tension, compression and bending, can be specified in this part. The input is divided into three tabs according to the stiffener type:
- Web stiffeners - horizontal stiffeners increasing the bearing capacity of web in tension or compression
- Flange stiffeners - stiffeners increasing the bending capacity of column flange
- Special stiffener types - stiffeners, that increase the shear bearing capacity of column
Input frame for stiffeners
Web stiffeners
These stiffeners are horizontal plates in the levels of beam flanges. The stiffeners for top and bottom flange can be specified separately. The beams with haunch can be restrained either in the level of beam flange or in the level of the haunch flange (can be defined in the window "Beam haunches"). The following inputs have to be specified for stiffeners:
aw |
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ts |
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The theory is described in chapter "Column web in tension and compression".
Horizontal web stiffeners (highlighted by red)
Flange stiffeners
This tab contains properties of column flange stiffeners and backing plates. Stiffeners and backing plates can be specified in the window "Column flange stiffener", that can be launched by the button "Add". Stiffeners and plates are organized in the table. The buttons "Edit" and "Remove" are also available for the work with these objects.
The theory is described in chapters "End plate or column flange in bending, bolts in tension" and "Column web in tension and compression".
Flange restrained by backing plates (blue) and horizontal stiffener (red)
Special stiffener types
The shear stiffeners of column web can be defined in this part. More types are available, it is also possible to use the additional web plates. Stiffeners are given by following dimensions:
aw |
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ts |
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hs |
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a1 |
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hs |
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The theory is described in chapter "Column web in shear".
Shear stiffeners (highlighted by red)