Chequered Plate All sides Pinned and Fixed
Chequered Plate All sides Pinned and Fixed
(OP)
Hi!
Can anyone explain the difference how all sides pinned and all sides fixed chequered plate will be welded?
I came across one excel file which allows the user to select this option.
Can anyone explain the difference how all sides pinned and all sides fixed chequered plate will be welded?
I came across one excel file which allows the user to select this option.
RE: Chequered Plate All sides Pinned and Fixed
If fixed, a filet weld all around should do it.
RE: Chequered Plate All sides Pinned and Fixed
I was tginking the same but are you sure as I still have my doubts.
RE: Chequered Plate All sides Pinned and Fixed
RE: Chequered Plate All sides Pinned and Fixed
For fixed to supports, i.e rigidly connected, fillet weld all around plate. If supports rotate, plate is not fixed.
BA
RE: Chequered Plate All sides Pinned and Fixed
Checkered plate is often used for moveable covers and would be considered pinned all around. Sometimes they are loose plates with a 'handle or ring' for lifting, sometimes they are hinged on one side, again with a 'handle or ring' for lifting. It's not often that the edges are fixed. Permanent covers can be welded in place and the fixity caused by the distance from the edge of the opening to the location of the weld. This may be an inch or two and for a 1/4 checkered plate, this would create a relatively fixed edge condition. Also if the checkered plate is part of a floor and has a series of channels or angles in a grid pattern as support... the interior portions would be almost a fixed end condition.
Since checkered plate covers are nearly always not fixed at the perimeter, nearly always they fall into the pinned condition. The corner lever moments are nearly always small and negligible.
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-Dik
RE: Chequered Plate All sides Pinned and Fixed
Regarding edge fixities, only a tiny amount of edge movement required to effectively make checker plate a pinned connection and the joists are often of lower torsional rigidity too. So a fixed edge assumption can end up quite unconservative.
RE: Chequered Plate All sides Pinned and Fixed