| Title |
Experimental Evaluation of a Multi-action Hybrid Damper under Cyclic Loading |
| Authors |
Roh, Ji-Eun ; Lee, Sang-Hyun |
| DOI |
http://dx.doi.org/10.5659/JAIK_SC.2016.32.11.3 |
| Keywords |
Mmulti-action hybrid damper ; Lead-rubber bearing ; Friction damper ; Cyclic loading tests |
| Abstract |
In this study, a multi-action hybrid damper (MHD) showing independent hysteretic characteristics for small and large loading conditions is presented. The MHD is composed of steel elements, two friction pads, and two lead-rubber bearings. Since the friction pads and the lead-rubber bearings are in series connection, only the lead rubber bearing deforms according to the excitation loads before the friction pad slippage occurs, and after the friction slippage, anymore deformation of the lead-rubber bearing does not occur and energy dissipation and damper deformation concentrates on the friction pad. Initial stiffness and hysteresis for small load such as wind for low-rise building is governed by the lead rubber bearing and yielding or friction load for the larger load such as earthquake is determined by the friction pad. Accordingly, the load-deformation behaviors before/after the friction slippage can be independently designed to show good performance for a building structure subject to wind and earthquake loads. The multi-action behavior and energy dissipation capacity of the MHD were evaluated by conducting the cyclic loading tests using a full scale MHD. The test results indicate that the MHD shows the expected hysteretic behavior and stable energy dissipation performance. |