| Title |
Verification of Behavior Characteristics of Precompression Polyurethane Damper Using Superelastic Shape Memory Alloy |
| Authors |
김영찬(Kim, Young-Chan) ; 허종완(Hu, Jong-Wan) |
| DOI |
https://doi.org/10.12652/Ksce.2023.43.4.0413 |
| Keywords |
댐퍼; 폴리우레탄; 초탄성형상기억합금; 선행 압축; 복원 특성 Damper; Polyurethane; SSMA; Precompression; Recovery characteristic |
| Abstract |
Among the seismic structures for reducing earthquake damage, the seismic control structure is a technology that can efficiently improve seismic performance and secure economic feasibility by simply applying a damper. However, existing dampers have limitations in terms of durability due to required seismic performance and material plasticity. In this study, we proposed a polyurethane damper with enhanced recovery characteristics by applying precompression to polyurethane, which basically shows elastic characteristics, and applying superelastic shape memory alloy (SSMA). To verify the characteristics of the polyurethane damper, the concept was first established, and the design details were completed by selecting SSMA and steel, and selecting the precompression size as design variables. In addition, structural tests were conducted to derive response behavior and analyze force resistance performance, residual displacement, recovery rate, and energy dissipation capacity. As a result of the analysis, the polyurethane damper showed that various performances improved when the SSMA wire was applied and the precompression increased. |