Reinforced concrete (RC) structure strengthened with ultra-high steel fiber reinforced concrete (UFC) is introduced in the study. Interior RC beam-column joint sub-assemblages strengthened by means of joint replacement with UFC are tested cyclically to observe their seismic performance. Prior to frame testing, UFC mechanical properties, for example the compressive, flexural, rebar bonding, and slant shear strengths, and durability are examined and discussed. The material test results indicate that the UFC displays excellent performance in terms of mechanical and durable behavior. The frame test results show that the UFC-replaced joint frame behaves very well in seismic resistance. Its performance is even much better than the frame strengthened with RC jacketing as normally seen in the traditional retrofit schemes.
Wang, Yung-Chih and Lee, Ming-Gin
"ULTRA-HIGH STRENGTH STEEL FIBER REINFORCED CONCRETE FOR STRENGTHENING OF RC FRAMES,"
Journal of Marine Science and Technology: Vol. 15:
3, Article 6.
Available at: https://jmstt.ntou.edu.tw/journal/vol15/iss3/6