The effect of FRP use on the Damage Index, Seismic Performance Levels and Ductility of The Bridges Circular Columns by Using IDA and NSP Analyses

Authors

Structural Department, Faculty of Environment and Civil Engineering, Tarbiat Modarres University, Tehran, Iran

Abstract

One of the purposes of this study is to investigate the effect of the FRP use in order to increase the ductility capacity and reduce the ductility demand under dynamic loads. In this order the maximum ductility demand in the circular columns used in the bridges in the cases of use and disuse of FRP under far field earthquake records has been investigated and the effect of this application on the ductility demands has been determined quantitatively. By using the results of this study, the effect of FRP using in increasing the lateral strength of these columns has been investigated quantitatively.
In the following, the columns damages in the cases of use and disuse of this polymers has been investigated quantitatively using an appropriate damage index and the effect of their use in reducing seismic damages has been studied.
Finally, using incremental non-linear dynamic analyses on these columns considering confinement due to the polymers, seismic performance level such as operational, Immediate Occupancy, life safety and Collapse Prevention limit states has been investigated and the effect of using FRP in bridges circular columns on the improvement of their seismic performance has been evaluated.

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References

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Journal of Civil and Environmental Engineering
Volume 53.1, Issue 110 - Serial Number 110
Spring 2023
May 2023
Pages 125-137

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