Hi,
How can I calculate the confinement factor for hollow circular column?
confinement factor for hollow column
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seismosoft
- Posts: 1197
- Joined: 06 Jul 2007, 04:55
Re: confinement factor for hollow column
We are not sure it is possible to mobilise much concrete confinement in a hollow section, but you may obviously carry out a literature search on the subject.
Seismosoft Support
Seismosoft Support
Re: confinement factor for hollow column
2 References that may help:
1. "Seismic Design and Retrofit of Bridges", Priestley, Seible, and Calvi, 1996, Wiley, ISBN 0-471-57998-X, page 147
2. "Flexural Strength and Ductility of Circular Hollow Reinforced Concrete Columns Without Confinement on Inside Face", ACI Structural Journal, Vol. 87, No. 2, March/April 1990, pp. 156-166.
In these references it is noted that the inner hoop actually has a negative confining effect upon the section and that many cross-ties are required.
1. "Seismic Design and Retrofit of Bridges", Priestley, Seible, and Calvi, 1996, Wiley, ISBN 0-471-57998-X, page 147
2. "Flexural Strength and Ductility of Circular Hollow Reinforced Concrete Columns Without Confinement on Inside Face", ACI Structural Journal, Vol. 87, No. 2, March/April 1990, pp. 156-166.
In these references it is noted that the inner hoop actually has a negative confining effect upon the section and that many cross-ties are required.
Tim Huff