Increase axial capacity of existing slender concrete column
Increase axial capacity of existing slender concrete column
(OP)
I am working on a project which involves an addition above an existing reinforced concrete building. The top story has slender columns (14" Diameter, 14' long). An increase of 110K will be added to each column (total gravity load of 185K).
I was thinking of using FRP to increase the axial capacity, but ACI 440 - Chapter 11 only discusses the axial strength of nonslender members. Does ACI have any other design guide which discusses slender members? If not, the other alternative I was considering was encasing the existing concrete columns in concrete and increasing capacity that way. Are there any other options?
Lateral loads will be handled by the addition of shear walls.
I was thinking of using FRP to increase the axial capacity, but ACI 440 - Chapter 11 only discusses the axial strength of nonslender members. Does ACI have any other design guide which discusses slender members? If not, the other alternative I was considering was encasing the existing concrete columns in concrete and increasing capacity that way. Are there any other options?
Lateral loads will be handled by the addition of shear walls.
RE: Increase axial capacity of existing slender concrete column
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Increase axial capacity of existing slender concrete column
RE: Increase axial capacity of existing slender concrete column
RE: Increase axial capacity of existing slender concrete column
I would suggest you do a google search on seismic retrofit, they do this sort of thing all the time. You may consider a steel jacket.
RE: Increase axial capacity of existing slender concrete column
5)Reinforcing with fiberglass jackets 6)Shortening the length of the columns.