Jordan Journal of Civil Engineering

Paper Detail

Investigation on Interaction Curves of FRP-Reinforced Concrete Columns

Volume 12, No. 3, 2018
Received: 2018/05/14, Accepted:


Jamshid Esmaeili; Masoud Farzam; Hadi Hamedi Baranlou;


Reinforcement of buildings and evolution of design codes are necessary due to the failure of buildings during earthquakes of any scale. Due to the seismicity of Iran and the tendency toward the use of concrete buildings, columns’ resistance against earthquake forces can play an important role in the reinforcement of an entire structure. One of the most common ways of reinforcing concrete columns to upgrade and retrofit their structural function is the use of FRPs (fiber-reinforced polymers). Moreover, studies have shown that concrete columns reinforced with FRP retrofit would increase the flexural strength of columns, since almost all concrete columns with axial loads and bending moment are affected. In this research, by using ANSYS 15.0, concrete columns were modeled once without FRPs and then by wrapping one, two, three and four FRP-layers. The size of columns is doubled for studying the effect of the increased size of columns on the interaction diagrams. These columns were analyzed by exerting eccentric axial loads and the interaction diagrams were obtained in different states. The results of the analysis showed that increasing the number of layers somewhat increases the strength. However, the excess of layers is not cost-effective.


Reinforced concrete columns, Interaction curves, ANSYS finite element software, FRPs.