Cyclic Load Tests on Precast Segmental Bridge Columns with Both Steel and Basalt FRP Reinforcement
Publication: Journal of Composites for Construction
Volume 23, Issue 3
Abstract
This paper presents an experimental investigation of a novel precast segmental bridge column (PSBC) that is longitudinally reinforced with both fiber-reinforced polymer (FRP) bars and conventional steel bars. The major objectives of this study were (1) to compare the seismic performance of FRP-steel–reinforced PSBCs (FSR-PSBCs) with the conventional steel-reinforced PSBC (SR-PSBC) members; and (2) to investigate the effects of the proportion of FRP to steel reinforcement and the gravity load level on the cyclic behavior of the FSR-PSBC. To this end, quasi-static tests were conducted on four large-scale PSBC specimens with heights of 4.2 m and cross sections of . Basalt FRP (BFRP) bars were employed in the FSR-PSBC specimens. Test results showed that as compared with the SR-PSBC, FSR-PSBC specimens exhibited appreciably improved self-centering capacities, postyield stiffness ratios, displacement ductility, and comparable hysteretic energy dissipation abilities. Furthermore, after the FSR-PSBC specimens were cyclically loaded up to a drift ratio of 5.5%, the damages were insignificant and could be repaired rapidly, indicating promising post-earthquake serviceability of these bridge columns.
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Acknowledgments
The authors would like to thank the financial support received from the National Key Research and Development Program of China (Grant No. 2017YFC0703001), the National Natural Science Foundation of China (Grant Nos. 51478143 and 51278150), and the China Scholarship Council (Grant No. 201606120180). In addition, the authors express their gratitude to Nanjing Fenghui Composite Material Co., Ltd., for providing BFRP bars for this experimental program.
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Published In
Journal of Composites for Construction
Volume 23 • Issue 3 • June 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jun 20, 2017
Accepted: Nov 12, 2018
Published online: Mar 13, 2019
Published in print: Jun 1, 2019
Discussion open until: Aug 13, 2019
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