Negative moment and reinforcement in steel decks over more than two supports.
Negative moment and reinforcement in steel decks over more than two supports.
(OP)
Greetings,
It has been my understanding in the past that for steel decks resting on more than two supports its necessary to provide reinforcement due to the negative moment that is generated over the supports (due to continuity). Now, I was reading some of the manufacturers manuals and in some of their examples they provide no steel at the continuity area and assume that because of this the deck should be considered as simply supported and designed as such. Is this common in day to day practice?, specially when the span length is small (around 4 ft)?
Thanks.
It has been my understanding in the past that for steel decks resting on more than two supports its necessary to provide reinforcement due to the negative moment that is generated over the supports (due to continuity). Now, I was reading some of the manufacturers manuals and in some of their examples they provide no steel at the continuity area and assume that because of this the deck should be considered as simply supported and designed as such. Is this common in day to day practice?, specially when the span length is small (around 4 ft)?
Thanks.






RE: Negative moment and reinforcement in steel decks over more than two supports.
RE: Negative moment and reinforcement in steel decks over more than two supports.
RE: Negative moment and reinforcement in steel decks over more than two supports.
RE: Negative moment and reinforcement in steel decks over more than two supports.
Support the WW mesh to stay high in the slab in the negative moment regions.
RE: Negative moment and reinforcement in steel decks over more than two supports.
RE: Negative moment and reinforcement in steel decks over more than two supports.
RE: Negative moment and reinforcement in steel decks over more than two supports.
If the "temperature steel" is in the correct position, it can certainly be used as flexural reinforcement. That is always the case. Flexural reinforcement can always be used to satisfy the requirements for shrinkage reinforcement.
RE: Negative moment and reinforcement in steel decks over more than two supports.
RE: Negative moment and reinforcement in steel decks over more than two supports.
RE: Negative moment and reinforcement in steel decks over more than two supports.
Thanks to everyone.
RE: Negative moment and reinforcement in steel decks over more than two supports.
And I have examined a number of projects where VE/Fear of VE removed the negative moment bars over a steel beam. Performance suffers without this detail. Always provide discrete reinforcement (rebar or welded wire) over stiff members to assure satisfactory/optimum performance.
RE: Negative moment and reinforcement in steel decks over more than two supports.
It is an interesting condition, if the ends of the beams can resist compression against the girder, you have a theoretical full depth moment connection if you reinforce the concrete sufficiently.
Michael.
"Science adjusts its views based on what's observed. Faith is the denial of observation so that belief can be preserved." ~ Tim Minchin