| Title |
An Experimental Study on the Seismic Performance of Reinforced Concrete Exterior Beam-Column Joint with Steel Fiber Volume Fractions |
| Authors |
Lee, Jang-Jae ; Bae, Baek-Il ; Choi, Chang-Sik |
| DOI |
https://doi.org/10.5659/JAIK_SC.2018.34.4.15 |
| Keywords |
Steel Fiber Reinforced Concrete ; Exterior Beam-Column Joint ; Seismic Performance |
| Abstract |
The purpose of this study is to evaluate the anchorage capacity of longitudinal bars for reinforced concrete exterior beam - column joints with steel fiber volume fractions. For this purpose, the steel fiber volume fraction was set to 0, 1, 2%, and the performance was compared with that of each other specimens. According to the test results, the maximum strength of EX-HK-NJR-0 decreased by 13% compared with the control specimen and EX-HK-NJR-1 decreased by 3% compared to the control specimen. However, when 2% of steel fiber was mixed, the maximum strength increased about 56% compared to the control specimen. The energy dissipation capacity of EX-HK-NJR-0 (when no transverse steel bars are placed) decreased by 61% compared to the control specimen. In addition, the energy dissipation capacity of the specimens with a steel fiber content of 1% decreased by 5% and 2% increased by 94% compared to control specimen. EX-HK-NJR-1,2 and the control specimen EX-HK-JR-0 experienced yielding of the reinforcing bars at the column interface before maximum strength development. However, when the EX-HK-NJR-0, the reinforcing bars at the column interface experienced yielding after maximum strength development. Therefore, reinforcement of steel fiber is considered to reduce the required development length for yielding of steel bars. |