Prediction Accuracy of Seismic Behavior of RC Noncircular Columns Retrofitted with FRP Sheets and the Impact of Local Concrete Compression Behavior
Publication: Journal of Structural Engineering
Volume 145, Issue 10
Abstract
More than 40 models have been established to date to determine the axial compressive behavior of noncircular (square or rectangular) concrete sections confined with fiber-reinforced polymers (FRPs) under concentric loadings. In this study, these models were classified into four groups, represented by nine analytical models. The accuracies of these models to capture the cyclic response of seven noncircular RC columns subjected to axial and reversible horizontal loads were evaluated. Specifically, the predicted responses revealed that the studied models predicted a premature FRP rupture failure mode, and in turn the simulation process was aborted early, revealing a low deformability capacity. By scrutinizing the available results, it was concluded that the axial compression behavior of the FRP-wrapped concrete was dependent on the applied loads, e.g., concentric axial load or axial load and bending moment. Subsequently, one of the examined models was adopted and revised to consider this effect. The modified model can accurately and safely simulate the lateral response of RC noncircular columns retrofitted with FRP, and it can be expanded for general application after verification against a notably large number of noncircular columns.
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Acknowledgments
This work was financed by the National Natural Science Foundation of China (Grant No. 2016YFC0701100).
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Published In
Journal of Structural Engineering
Volume 145 • Issue 10 • October 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Apr 20, 2018
Accepted: Feb 14, 2019
Published online: Jul 25, 2019
Published in print: Oct 1, 2019
Discussion open until: Dec 25, 2019
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