| Title |
Seismic Performance of HPFRCC Coupling Beams with Diagonal Reinforcement |
| Authors |
Yun Hyun-Do ; Kim Sun-Woo ; Jeon Esther ; Park Wan-Shin |
| Keywords |
HPFRCC ; Diagonal Reinforcement ; Precast Coupling Beams ; Shear Behavior ; Micro Cracks ; Bridging Action |
| Abstract |
Coupled shear walls consist of two or more in-plane walls inter-connected with coupling beams. In order to effectively resist seismic loads, coupling beams must be sufficiently stiff, strong and posses a stable load-deflection hysteretic response. Because of this, diagonally reinforced coupling beams have too complex reinforcement details and much depth to have sufficient strength and stiffness. This paper reports experimental data on the seismic performance of precast diagonally reinforced coupling beams with high performance fiber reinforced cement composite(HPFRCC). The variable in the test program was the use of concrete or HPFRCC in coupling beams. Precast diagonally reinforced coupling beams with concrete and HPFRCC(PCB-DC and PCB-DH specimen) were tested to evaluate their failure modes, shear behavior, multiple crack pattern, energy dissipation and bar strain. Based on the experimental results, PCB-DH specimen offers greater performance and energy absorbing capability than reinforced concrete coupling beam due to bridging action of fibers in concrete. |