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Types of Columns in Building Construction

Columns are classified based on the several conditions which include:

Based on Types of Reinforcement
Based on Types of Loading
Based on Slenderness Ratio
Based on Shape
Based on Construction Material
Based on Types of Reinforcement

We'll post 14 different types of columns in the following posts.

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1. Tied Column

This type of column is commonly construction from reinforced concrete. Longitudinal reinforcement are confined within closely spaced tie reinforcement. It is estimated that 95% of all columns in buildings are tied. @engineer03 #share

2. Spiral Column

Spiral column is also construction from reinforced concrete. In this type of column, longitudinal bars are confined within closely spaced and continuously wound spiral reinforcement.
Spiral reinforcement provide lateral restrains (Poisson’s effect) and delays axial load failure (ductile).@engineer03. #share

The force in BF of the truss shown in given figure, is

A. 4t tension
B. 4t compression
C. 4.5t tension
D. 4.5t compression
E. zero.

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The answer will posting @11:30 today

It is so simple exam

3. Composite column

When the longitudinal reinforcement is in the form of structural steel section or pipe with or without longitudinal bars, it is called as a composite column.

This type of column have high strength with fairly small cross section, in addition to exhibit good fire performance.

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4. Axially Loaded Column
If vertical axial loads act on the center of gravity of the cross-section of the column, then it is termed as axially loaded column.

Axially loaded column is rare in construction since coinciding vertical loads on the center of gravity of column cross section is not practical.

Interior column of multi-storey buildings with symmetrical loads from floor slabs from all sides is an example of this type of column. #share. @engineer03

5. Column with Uniaxial Eccentric Loading

When vertical loads do not coincide with center of gravity of column cross section, but rather act eccentrically either on X or Y axis of the column cross section, then it is called uniaxially eccentric loading column.

Column with uniaxial loading are generally encountered in the case of columns rigidly connected beam from one side only such as edge columns.
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6. Column with Biaxial Eccentric Loading

When vertical on the column is not coincide with center of gravity of column cross section and does not act on either axis (X and Y axis), then the column is called biaxially eccentric loaded column.

Columns with biaxial loading is common in corner columns with beams rigidly connected at right angles at the top of columns.

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7. Short Column

If the ratio effective length of the column to the least lateral dimension is less than 12, the column is called as the short column. A short column fails by crushing (pure compression failure).
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Solution


✍️Reactions are va+ab = 5t.

✍️Moment at A= 4t*x+5t*x-vb*2x = 0.

✍️So 9t = 2vb.

📝vb = 4.5t.

So force in compression member BF = 4.5t compression.