Analysis of carbon fiber sheet-retrofitted RC bridge columns under lateral cyclic loading

Issue Date

1-2009

Abstract

In recent years, the use of carbon fiber sheet (CFS) to provide lateral confinement for enhanced ductility and strength of reinforced concrete bridge columns has been increasing. While the monotonic behavior of CFS-confined concrete has been studied extensively, its cyclic response has not been fully understood. Most of the available studies are experimental investigations, hence there is a need to develop an analytical model to simulate the experimental results. Analysis of the hysteretic behavior of CFS-retrofitted circular columns is presented in this article using the fiber element that is based on cyclic constitutive models of longitudinal reinforcement and concrete confined by both CFS and tie reinforcement. The analysis was verified based on available cyclic test data and the analysis provides good agreement with the experimental results. Results show that flexural strength and ductility of columns wrapped with CFS increases as CFS ratio increases. However, as tie reinforcement ratio increases, there is no much difference on the hysteretic response for low tie reinforcement ratios. Using the fiber element analysis, the effect of CFS retrofit on the seismic response of a 7.5 m tall prototype pier built in the 1970s to 1980s is also clarified.

Source or Periodical Title

Journal of Earthquake Engineering

ISSN

13632469

Volume

13

Issue

2

Page

129-154

Document Type

Article

College

College of Engineering and Agro-Industrial Technology (CEAT)

Language

English

Subject

Bridge Columns, Carbon Fiber Sheet, Cyclic Response, Nonlinear Analysis, Reinforced Concrete

Identifier

https://doi.org/10.1080/13632460802347455

Digital Copy

yes

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