Type of Columns (Concrete Columns)

Columns

A column in structural engineering is a vertical structural element that transmits, through compression, the weight of the structure above to other structural elements below. For the purpose of wind or earthquake engineering, columns may be designed to resist lateral forces. Other compression members are often termed "columns" because of the similar stress conditions. Columns are frequently used to support beams or arches on which the upper parts of walls or ceilings rest.

Column

• Vertical Structural members.
•  Transmits axial compressive loads with or without moment.
•  Transmit loads from the floor and roof to the foundation.

Column Types:

1. Tied
2. Spiral
3. Composite
4. Combination
5. Steel pipe

Tied Columns

 95% of all columns in buildings are tied

Tie spacing     h (except for seismic)

tie support long bars (reduce buckling)

ties provide negligible restraint to lateral expose of core

Spiral Columns

Pitch = 1.375 in. to 3.375 in.

spiral restrains lateral  (Poisson’s effect)

axial load      delays failure (ductile)

References :

www.wikipedia.org

Dr. E.W. Sandt