Although I have selected a rib on column web for my connection, it is apparently not taken into account in the design. How are the web stiffeners handled in the design?

Answer

Specifically, for the "Column web, Compression Force, Bottom" design, a specified web stiffener is only applied to the design if it is actually required, or if the design without web stiffener cannot be performed. In the latter case, the comment "Web Stiffener Needed" appears in the last column of the results table.

It is also important to note whether a continuous rib or a partial rib is applied.
In the case of the partial rib, the compressive force is divided into web and rib and thus designed.
If a continuous rib is used, the column web is first fully loaded and the excess load is applied to the rib. In the case of T-joints and cross joints, this approach prevents the rib from being overloaded.

Keywords

Web stiffener Column web Partial rib Compression force - bottom

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Design of rigid bolted frame joints according to Eurocode 3 or DIN 18800

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