Pinned or Fixed Suports
Pinned or Fixed Suports
(OP)
I am designing a masonry building. It is 12" thick on a strip footing. Would support be pinned or fixed?
JO
Thank You
JO
Thank You
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RE: Pinned or Fixed Suports
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Pinned or Fixed Suports
RE: Pinned or Fixed Suports
RE: Pinned or Fixed Suports
As long as you have a tensile force and a compression force with some distance between them - there's your couple.
With a single line of dowels down the middle, you have a very small arm between the two, but it's helpful in some cases.
In this case, I assume we're talking about out of plane loading.
In order to use any fixity, your need to develop the couple, and the foundation/soil below the soil need to resist the moment couple.
For the sake of simplicity, I'd treat it as pinned.
RE: Pinned or Fixed Suports
JO
RE: Pinned or Fixed Suports
RE: Pinned or Fixed Suports
Ok I get it thanks.
RE: Pinned or Fixed Suports
BA
RE: Pinned or Fixed Suports
RE: Pinned or Fixed Suports
RE: Pinned or Fixed Suports
RE: Pinned or Fixed Suports
Here, I thought that any fixity would come from 4+ feet of embedment into compacted soil. I'd put far more stock in that than I would rotational stiffness of a strip footing. Is that not the case here?
If you want to base fixity on the restraint provided by the footing, the soil has to work, the footing has to work (transverse steel), the starter dowels need to be developed into the footing and lapped with the vertical bars, and the dowel hooks need to extend across the wall rather than away from it. It takes a fair bit to get the job done right.
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Pinned or Fixed Suports
RE: Pinned or Fixed Suports
RE: Pinned or Fixed Suports