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https://hdl.handle.net/2440/78514
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Type: | Journal article |
Title: | FRP-confined concrete in circular sections: Review and assessment of stress-strain models |
Author: | Ozbakkaloglu, T. Lim, J. Vincent, T. |
Citation: | Engineering Structures, 2013; 49:1068-1088 |
Publisher: | Elsevier Sci Ltd |
Issue Date: | 2013 |
ISSN: | 0141-0296 1873-7323 |
Statement of Responsibility: | Togay Ozbakkaloglu, Jian C. Lim, Thomas Vincent |
Abstract: | An important application of FRP composites is as a confining material for concrete, in both the seismic retrofit of existing reinforced concrete columns and in the construction of concrete-filled FRP tubes as earthquake-resistant columns in new construction. Reliable design of these structural members necessitates clear understanding and accurate modeling of the stress-strain behavior of FRP-confined concrete. To that end, a great number of studies have been conducted in the past two decades, which has led to the development of a large number of models to predict the stress-strain behavior of FRP-confined concrete under axial compression. This paper presents a comprehensive review of 88 models developed to predict the axial stress-strain behavior of FRP-confined concrete in circular sections. Each of the reviewed models and their theoretical bases are summarized and the models are classified into two broad categories, namely design-oriented and analysis-oriented models. This review summarizes the current published literature until the end of 2011, and presents a unified framework for future reference. To provide a comprehensive assessment of the performances of the reviewed models, a large and reliable test database containing the test results of 730 FRP-confined concrete cylinders tested under monotonic axial compression is first established. The performance of each existing stress-strain model is then assessed using this database, and the results of this assessment are presented through selected statistical indicators. In the final part of the paper, a critical discussion is presented on the important factors that influenced the overall performances of the models. A close examination of results of the model assessment has led to a number of important conclusions on the strengths and weaknesses of the existing stress-strain models, which are clearly summarized. Based on these observations, a number of recommendations regarding future research directions are also outlined. © 2012 Elsevier Ltd. |
Keywords: | Concrete Fiber reinforced polymer Confinement Axial stress Axial strain Stress–strain models Strength models |
Rights: | © 2012 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.engstruct.2012.06.010 |
Published version: | http://dx.doi.org/10.1016/j.engstruct.2012.06.010 |
Appears in Collections: | Aurora harvest Civil and Environmental Engineering publications |
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