| Title |
The Structural Performance of Reinforced Concrete Column Retrofitted with Replaceable Steel Link Subjected to Eccentric Load |
| Authors |
이정인(Lee, Jeong In) ; 임지훈(Lim, Ji Hoon) ; 이영학(Lee, Young Hak) |
| DOI |
https://doi.org/10.5659/JAIK.2022.38.5.195 |
| Keywords |
Seismic retrofit; seismic performance; brace; reinforced concrete column; cyclic loading test |
| Abstract |
There are several retrofitting techniques used for the seismic retrofit of reinforced concrete frames, but choosing a technique entails
considering various factors. Among these techniques, the steel brace is widely known to have great seismic performance; it is the most
efficient seismic retrofit method to resist to lateral forces and gusset plate is an important component for its performance. Although the
gusset plate has developed a lot to improve the seismic performance of a steel brace, it is impractical due to its complicated details. This
study presents a simplified seismic retrofit method named the replaceable steel link (RSL) system. The key advantage of this system is that
the details are quite simple compared to buckling-restrained braces (BRB), and since moving along with the deformation of the column is
possible, the displacement can be absorbed. Furthermore, the RSL can be easily replaced even if the steel link is deformed or buckled. A
total of two non-retrofitted specimens and two retrofitted specimens were fabricated and tested to evaluate their structural performances. Two
types of loading methods were applied as variables. As a result of the experiment, specimens retrofitted with the proposed RSL system
showed 169% of maximum load, 142% of effective stiffness, and 250% of energy dissipation capacity compared to non-retrofitted specimen.
These results prove that the retrofit method of the RSL system is effective for resisting seismic load. |