| Title |
A Study on the Effect of Steel Fiber in Reinforced Concrete Coupling Beam Subjected to Cyclic Loading |
| Authors |
Kim, Jin-Sung ; Bae, Baek-Il ; Choi, Chang-Sik |
| DOI |
https://doi.org/10.5659/JAIK_SC.2019.35.10.181 |
| Keywords |
Steel Fiber; Reinforced Concrete Coupling Beam; Detail Simplification; Cyclic Behavior |
| Abstract |
In this study, four reinforced concrete coupling beams were subjected to cyclic lateral loading test to evaluate the structural performance of
coupling beam according to volume fraction of steel fiber. For this purpose, the volume fraction of steel fiber(0%, 1%, 2%) and transverse
reinforcement spacing were determined as the main parameter. According to the test results, the maximum strength of D-40C-s100-0 was
1.15, 1.13, 1.05 times higher than D-40C-s300-0, D-40C-s300-1, D-40C-s300-2, respectively. The maximum strength of coupling beams with
mitigated rebar details increases as the volume fraction of steel fiber increases. Although steel fiber 2% reinforced specimen(D-40C-s300-2)
did not satisfy the amount of transverse reinforcement required for seismic design of coupling beam, the overall performance including to
maximum strength, ductility and energy dissipation capacity was similar to the control specimen(D-40C-s100-0). As a result, the use of steel
fiber with 2% reinforcement can partially replace the transverse reinforcement in diagonally reinforced concrete coupling beam. |