KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Verification of Behavior Characteristics of Precompression Polyurethane Damper Using Superelastic Shape Memory Alloy

초탄성 형상기억합금을 적용한 선행압축 폴리우레탄 댐퍼의 거동 특성 검증

  • 김영찬 (인천대학교 산학협력단, 인천방재연구센터) ;
  • 허종완 (인천대학교 건설환경공학부, 인천방재연구센터)
  • Received : 2023.02.27
  • Accepted : 2023.03.16
  • Published : 2023.08.01
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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.

지진피해 감소를 위한 내진 구조 중에서 제진 구조는 댐퍼의 간단한 적용으로 효율적으로 내진 성능을 향상시키고 경제성을 확보할 수 있는 기술이다. 그러나 기존의 댐퍼는 요구 내진 성능과 재료 소성으로 인한 내구성에 대하여 한계를 나타낸다. 따라서 본 연구에서는 기본적으로 탄성 특성을 나타내는 폴리우레탄에 선행 압축을 가하고 초탄성 형상기억합금을 적용하여 복원 특성을 증진시킨 폴리우레탄 댐퍼를 제안하였다. 폴리우레탄 댐퍼의 특성을 검증하기 위하여 우선 개념을 정립하고 초탄성 형상기억합금과 강재 적용, 선행압축 크기를 설계 변수로 선정하여 설계 상세를 완성하였다. 또한, 구조 실험을 수행하여 응답 거동을 도출하여 하중 저항 성능, 잔류 변위, 회복률, 에너지 소산 능력을 분석하였다. 분석한 결과 폴리우레탄 댐퍼는 초탄성 형상기억합금 와이어를 적용하고 선행 압축이 증가하면 다양한 성능이 향상되는 결과를 나타냈다.

Keywords

Acknowledgement

본 연구는 한국연구재단 중견후속연구 사업(2021R1A2B5B0200259911)의 지원에 의해 수행되었습니다. 본 연구 지원에 깊은 감사를 드립니다.

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