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Materials
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Introduction

Reinforcement of columns

Columns are the structural components that mainly ensure the required seismic performance of the building and the stirrups are the most critical components of the columns

COLUMN 300 x 300 mm (with its entire length taken as a critical area)

In the second version of the column reinforcement the entire length of the column is considered as a critical area and Ø10 stirrups have been placed at a spacing of 100 mm. The column’s length is 2.70 m therefore, the provided stirrups are 27. This is presented as 27Ø10/100.
The stirrups placed in the joint area are Ø10/100, their total number is 5 and consequently, they are presented as 5Ø10/100.

COLUMN 300 x 300 mm (with critical and non-critical areas)

In this first version of the column reinforcement, Ø10 stirrups, at a spacing of 150 mm, have been placed throughout the entire middle area of the column. That area’s length is 1.50 m and therefore the number of the provided stirrups is 10. This is presented as 10Ø10/150.
The stirrups placed in each of the column’s critical areas are Ø10/100, their total number is 6 and consequently they are presented as 6Ø10/100.The stirrups placed in the joint area are Ø10/100, their total number is 5 and therefore they are presented as 5Ø10/100.