Finite element-based modal analysis of carbon and glass fiber reinforced column skeletons

Composite materials are used in sectors such as automotive, defense, marine, and aviation due to the high strength and lightness provided by fiber and matrix material. In addition to these sectors, composites are frequently preferred as coating materials in the construction sector to increase the strength of buildings. The basic structure of the building column is formed by concrete, longitudinal reinforcements, and stirrups. Using steel material in longitudinal reinforcements and stirrups is widely preferred in traditional construction applications. However, in this study where the skeleton of a column widely used in the construction sector is designed, Epoxy Carbon Woven Prepreg and Epoxy S-Glass UD composites were used instead of steel in longitudinal reinforcements. The material of the stirrup is steel. Since the skeleton is more flexible than concrete and thus affects the vibration behavior more, concrete modeling as a matrix material was not included in the analysis. Numerical vibration analysis was performed to examine the dynamic behavior of the skeleton. Vibration analysis was performed for both composite materials and steel. As a result of the analysis, the natural frequencies and mode shapes of the structure were determined. In addition, the effect of the use of composites on the vibration results was revealed by comparing the obtained natural frequencies. Using glass fiber composite instead of steel caused a decrease in the average vibration values, while using carbon fiber composite caused an increase. Using carbon and glass fiber caused an increase in deformation.