Abstract

Wrapping reinforced concrete (RC) columns with fiber reinforced polymer (FRP) composites is effective in increasing their capacity. The current state of the art concentrates primarily on fully wrapped columns and few studies dealt with partially wrapped ones. The objective herein is to evaluate the effectiveness of partial wraps (or strips) and to develop a confined concrete compressive stress–strain (fc − εc) model that accounts for partial wrapping. Three-dimensional finite element (FE) models are generated to evaluate the influence of different parameters on the behavior of concentrically loaded RC circular columns that are partially and fully wrapped with FRP. The results indicated an increase in ductility as the number of FRP strips is increased, and revealed that longitudinal steel had little influence on the confined fc − εc relationship. The proposed fc − εc model, derived from the parametric study, accounts for the effect of partial and full confinement, the unconfined concrete strength f c, and yielding of transverse steel. Comparison of the results generated using the proposed model with FE and experimental results are in good agreement.

Document Type

Article

Publication Date

12-2018

Notes/Citation Information

Published in International Journal of Concrete Structures and Materials, v. 12, 52, p. 1-17.

© The Author(s) 2018

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Digital Object Identifier (DOI)

https://doi.org/10.1186/s40069-018-0283-2

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