Behavior of Circular Fiber-Reinforced Polymer–Steel-Confined Concrete Columns Subjected to Reversed Cyclic Loads: Experimental Studies and Finite-Element Analysis
Publication: Journal of Structural Engineering
Volume 145, Issue 9
Abstract
This paper studied experimentally the behavior of circular fiber-reinforced polymer (FRP)–steel-confined concrete columns subjected to reversed cyclic loads. The influence of main structural factors on the cyclic behavior of the columns is discussed. Test results showed the outstanding seismic performance of FRP–steel-confined RC and steel-reinforced concrete (SRC) columns. The lateral confinement effectiveness of glass fiber–reinforced polymer (GFRP) tubes and GFRP–steel tubes was verified and a simplified OpenSees-based finite-element method (FEM) model was developed to simulate the experimental results of the test columns. Based on the proposed FEM model, a parametric analysis was conducted to investigate the effects of main factors on the reversed cyclic behavior of GFRP–steel-confined RC columns. Based on the test and numerical analyses, the study discussed the influence of variables such as the lateral confinement on the plastic hinge region (PHR) height and peak drift ratio of the columns under reversed cyclic loads. Results indicate that lateral confinement significantly affects the PHR height of circular confined RC columns. Based on the analyses of the data from this study and literature, a simple model was suggested to predict the peak drift ratio of confined RC columns.
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Acknowledgments
This work was supported by the National Key R&D Program of China (Project No. 2017YFC0703007), the National Natural Science Foundation of China (Project Nos. 51778102 and 51708433), the Fundamental Research Funds for the Central Universities (Project No. DUT18LK35), and the Natural Science Foundation of Liaoning Province of China (Project No. 20180550763).
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Published In
Journal of Structural Engineering
Volume 145 • Issue 9 • September 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Apr 23, 2018
Accepted: Jan 10, 2019
Published online: Jun 25, 2019
Published in print: Sep 1, 2019
Discussion open until: Nov 25, 2019
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