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A reinforced concrete column is a structural member designed to carry compressive loads, composed of concrete with an embedded steel frame to provide reinforcement. For design purposes, the columns are separated into two categories: short columns and slender columns.
In practical design, it is recommended to increase the factors as shown above. The following assumptions are made while deriving Euler's formula: [3] The material of the column is homogeneous and isotropic. The compressive load on the column is axial only. The column is free from initial stress. The weight of the column is neglected.
Greek Doric columns had no base, and this prevented the flutes, which ended in a sharp arris, being worn down by people brushing past. [3] The flutes continue right down to the base of the column, [21] and at the top usually pass through three very narrow bands cut into the stone before reaching the base of the capital, where the shaft swells ...
The Ionic column is always more slender than the Doric; therefore, it always has a base: [5] Ionic columns are eight and nine column-diameters tall, and even more in the Antebellum colonnades of late American Greek Revival plantation houses. [citation needed] Ionic columns are most often fluted. After a little early experimentation, the number ...
The slenderness ratio is an indicator of the specimen's resistance to bending and buckling, due to its length and cross section. If the slenderness ratio is less than the critical slenderness ratio, the column is considered to be a short column. In these cases, the Johnson parabola is more applicable than the Euler formula. [5]
A steel column is extended by welding or bolting splice plates on the flanges and webs or walls of the columns to provide a few inches or feet of load transfer from the upper to the lower column section. A timber column is usually extended by the use of a steel tube or wrapped-around sheet-metal plate bolted onto the two connecting timber sections.
A colonnette is a small slender column, [1] usually decorative, which supports a beam or lintel.Colonnettes have also been used to refer to a feature of furnishings such as a dressing table and case clock, [2] [3] and even studied by archeologists in Roman ceramics. [4]
The columns became popular in Catholic Europe including southern Germany. The Solomonic column spread to Spain at about the same time as Bernini was making his new columns, and from Spain to Spanish colonies in the Americas, where the salomónica was often used in churches as an indispensable element of the Churrigueresque style.