Pinned Connection details for concrete
Pinned Connection details for concrete
(OP)
Hello,
For concrete structure, how do you detail a pin connection between the column and foundation? Is it right to detail a moment connection in your drawings even if we assumed a pin connection in our structural analysis for foundation support? What are the consequence if do nott follow our support assumptions, say pin in the model but fix in the detail?
Thank you,
Structech08
For concrete structure, how do you detail a pin connection between the column and foundation? Is it right to detail a moment connection in your drawings even if we assumed a pin connection in our structural analysis for foundation support? What are the consequence if do nott follow our support assumptions, say pin in the model but fix in the detail?
Thank you,
Structech08






RE: Pinned Connection details for concrete
RE: Pinned Connection details for concrete
RE: Pinned Connection details for concrete
Is it right to detail a moment when analyzing as a pin? - Most of the time, yes. You will never have a full moment at the concrete to soil transition (soil will give). Assuming no rotational resistance is conservative and fairly standard.
Consequences - on a PT garage, when the strands are stressed the slab elastically shrinks. The columns attached to the slab are drawn to the center of rigidity. In some cases the top of columns can be pulled over several inches and a hinge will form. If the hinge is not detailed, you get cracks.
RE: Pinned Connection details for concrete
If your building shortens by several inches, it is too long. Movement joints are required. And the elastic shortening by tensioning is only part of the story...normal drying shrinkage accounts for most of the shortening.
RE: Pinned Connection details for concrete
Thank you for your inputs. I appreciate it.
Regards,
Structech 08