Experimental study on ductility improvement of reinforced concrete rectangular Columns retrofitted with a new fiber reinforced plastics method

• Published in: Journal of Shanghai University Vol. 12; no. 1; pp. 7 - 14
• Main Author: 刘涛 冯伟 张智梅 欧阳煜
• Format: Journal Article
• Language: English
• Published: Shanghai Shanghai University Press 01.02.2008
• Subjects: Classical Mechanics; Engineering; Environment; FRP技术; Life Sciences; Materials Science; Mathematical and Computational Engineering; Mechatronics; 加固钢筋混凝土; 矩形柱; 试验研究; seismic behavior; 74A45; ductility; retrofit; fiber-reinforced plastics (FRP); reinforced concrete (RC) rectangular column
• ISSN: 1007-6417; 1863-236X
• DOI: 10.1007/s11741-008-0102-1

Reinforced concrete （RC） columns lacking adequately detailed transverse reinforcement do not possess the necessary ductility to dissipate seismic energy during a major earthquake without severe strength degradation. In this paper, a new retrofit method, which utilized fiber-reinforced plastics （FRP） confinement mechanism and anchorage of embedded bars, was developed aiming to retrofit non-ductile large RC rectangular columns to prevent the damage of the plastic hinges. Carbon FRP （CFRP） sheets and glass FRP （GFRP） bars were used in this test, and five scaled RC columns were tested to examine the function of this new method for improving the ductility of columns. Responses of columns were examined before and after being retrofitted. Test results indicate that this new composite method can be very effective to improve the anti-seismic behavior of non-ductile RC columns compared with normal CFRP sheets retrofitted column.