RC moment frame - REINFORCEMENT?
RC moment frame - REINFORCEMENT?
(OP)
I m designing RC frame (one storey). It is a moment frame so column - beam reinforcement details are important.
I have to draw reinforcement details for column - beam connection and Im kinda lost - im doing this for the 1st time and I dont have any examples.
Should I leave straight reinforcement from the columns and bent beam rebars at the end and connect them to column rebars (case 1)?
or should I bent column rebars at the top into the beam (case 2) and leave beam reabars straight?
or should I do combination of both cases?
I also dont know what to do with each rebar at the top of a column since there are so many of them. If there was another storey above Id leave column rebars straight, but since I have one storey, i m not sure.
I m also not sure how to do this since its a 3d frame. I have another beam from other direction too. so im confused which rebars to bent.
What is the most sufficient and simple way to go there? Any detail, photo would be great...




I have to draw reinforcement details for column - beam connection and Im kinda lost - im doing this for the 1st time and I dont have any examples.
Should I leave straight reinforcement from the columns and bent beam rebars at the end and connect them to column rebars (case 1)?
or should I bent column rebars at the top into the beam (case 2) and leave beam reabars straight?
or should I do combination of both cases?
I also dont know what to do with each rebar at the top of a column since there are so many of them. If there was another storey above Id leave column rebars straight, but since I have one storey, i m not sure.
I m also not sure how to do this since its a 3d frame. I have another beam from other direction too. so im confused which rebars to bent.
What is the most sufficient and simple way to go there? Any detail, photo would be great...










RE: RC moment frame - REINFORCEMENT?
- I try to avoid having beam bars cast into the column as that's a pain in the field.
- May need some vertical u-bar ties coming down from the top of the beam.
- Get yourself a copy of this: 352R-02
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: RC moment frame - REINFORCEMENT?
Do a quick detail showing bar placement to avoid conflicts. Draw the bars with the correct hook bending radius, too. [italics-added to original post]
Dik
RE: RC moment frame - REINFORCEMENT?
Just bending the bars around the corner will not get you exactly what you're after. Take a close look at how the stresses try to transfer across the joint. Do some research into opening and closing joints in concrete.
RE: RC moment frame - REINFORCEMENT?