| Title |
Shaking Table Tests on the Seismic Damping-Isolation Unit Composed of a Spring and Vibration-Proof Rubbers for Improving a Seismic Performance in Ceiling Structures |
| Authors |
원은비(Won, Eun-Bee) ; 문주현(Mun, Ju-Hyun) ; 양근혁(Yang, Keun-Hyeok) |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.1.243 |
| Keywords |
vibration-control unit; spring; vibration-proof rubber; shaking table test; dynamic property |
| Abstract |
This study examined the dynamic properties of a seismic damping-isolation SDI unit developed to enhance the seismic capacity of suspended
ceiling structures. The developed SDI unit consisted of springs, vibration-proof rubber and bolts; a prestress force was introduced to improve
the damping capacity of each material. The main variables involved whether or not the bolt introduced prestress force and included the
number of layers of vibration-proof rubber. As a result of a shaking table test, the response acceleration, relative displacement, and
amplification coefficients of SDI unit decreased 55.68%, 49.26%, and 56.89%, respectively compared to general hangar bolts, while the
damping ratio increased by about 1.47 times. Based on these experimental results, for the SDI unit, the magnitude of the prestress force of
0.1 in the bolt and the vibration-proof rubber laminated in two are recommended. |