The use of double U-bar stirrups in seismically loaded reinforced concrete beam-column joints
The performance of double U-bar stirrups, in the joint core region of seismically loaded beam-column connections, was compared with that of conventional square bent-up stirrups. The new type of stirrup consists of two half stirrups, bent into the shape of a U, forming a square with overlapping legs. These are easier to fix in congested joint core regions. Experimental and analytical results showed that double U-bar stirrups with full depth overlap perform extremely well, and even maintain the integrity of the joint core better than the conventional stirrups. U-bar stirrups with only half depth overlap also performed well, but were slightly inferior to the conventional configuration. © 1995.
Structural Engineering Review
Bousri, Y., & Smith, J. (1995). The use of double U-bar stirrups in seismically loaded reinforced concrete beam-column joints. Structural Engineering Review, 7 (2), 131-143. Retrieved from https://digitalcommons.memphis.edu/facpubs/11467