Detailing of Pin ended Connection Reinforced Concrete Column
Detailing of Pin ended Connection Reinforced Concrete Column
(OP)
Hello Everyone,
Can any body provide reference to the detail of pin ended connection of reinforced concrete column?
Can any body provide reference to the detail of pin ended connection of reinforced concrete column?






RE: Detailing of Pin ended Connection Reinforced Concrete Column
RE: Detailing of Pin ended Connection Reinforced Concrete Column
RE: Detailing of Pin ended Connection Reinforced Concrete Column
RE: Detailing of Pin ended Connection Reinforced Concrete Column
http://www.nceng.com.au/
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."
RE: Detailing of Pin ended Connection Reinforced Concrete Column
RE: Detailing of Pin ended Connection Reinforced Concrete Column
Is it ok to detail a reinforced concrete column like this? The spalling of concrete at the pin location shall be protected by concentration of stirrups at the location.
RE: Detailing of Pin ended Connection Reinforced Concrete Column
RE: Detailing of Pin ended Connection Reinforced Concrete Column
Can you give more information on the specific detail and where it is intended to be used. I am sure ARAMCO would have a reasoning behind doing this, other than just stating this. It is a difficult detail to build.
RE: Detailing of Pin ended Connection Reinforced Concrete Column
yes the main reason for using a pin ended connection is to obtain a stiffer super structure. In fact the isolated footing is never fixed end condition.
And definitely the bars will be adjusted to avoid the criss-cross.
The column will give partial fixity in the other direction.
RE: Detailing of Pin ended Connection Reinforced Concrete Column
By the way, I do understand where the spec-writers are coming from, I think. I've seen many cases where finite element models were made to "work" by the user inputting unrealistic fixed base conditions. It can make a lot of your problems go away...during the modeling phase, that is, only to reappear during the reality phase of the project when the spaghetti-noodle structure gets blown down in the wind.
RE: Detailing of Pin ended Connection Reinforced Concrete Column
RE: Detailing of Pin ended Connection Reinforced Concrete Column
The proposed detail is not useful. If you were going to detail the connection between the footing and column to allow rotation under large deformation of the superstructure, it would require significantly more complexity. Even with dowels only along the central axis of rotation, it would require either debonding of dowels (and potential displacement of the column) or crushing of the concrete, in order to activate the hinge/pin.
Designing with pinned fixity at a footing yields a stiffer and stronger structure (as previously mentioned) and any fixity provided by the foundation element will add to stability but is not be required. It is a mistake to think that an actual pinned condition is necessary. That said, if the footing is at one level and then a slab is installed higher up on the column, excessive fixity may well be a problem. You can end up with a stiff column that is not strong enough.
RE: Detailing of Pin ended Connection Reinforced Concrete Column
RE: Detailing of Pin ended Connection Reinforced Concrete Column
Can you please elaborate
"That said, if the footing is at one level and then a slab is installed higher up on the column, excessive fixity may well be a problem. You can end up with a stiff column that is not strong enough".