Columns are vertical or inclined compression members used for transferring superstructure’s load to the foundation. The structural design of reinforced concrete (RC) columns involves the provision of adequate compression reinforcement and member size to guaranty the stability of the structure. In typical cases, columns are usually rectangular, square, or circular shaped. Other sections such as elliptical, octagonal, etc., are also possible.
Columns are usually classified as short or slender depending on their slenderness ratio, and this in turn influences their mode of failure. In framed structures, columns are either subjected to uniaxial, or biaxial bending depending on their location and/or loading condition. EN 1992- 1-1:2004 (Eurocode 2) demands that we include the effects of imperfections in the structural design of columns. The structural design of reinforced concrete columns is covered in section 5.8 of Eurocode 2.
In this blog, we start the discussion on column design with simple case of a short rectangular column under uniaxial bending. The focus will be on design of the short column using MN interaction curves. In upcoming blogs, we will focus on more complex cases such as column under biaxial bending and slender column design.
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