형상기억합금의 휨거동 및 교량변위제어장치적용 연구Bending behavior of shape memory alloy bar and its application of seismic restrainers for bridges
- Other Titles
- Bending behavior of shape memory alloy bar and its application of seismic restrainers for bridges
- Authors
- 최은수; 박주남; 김학수; 이도형
- Issue Date
- 2007
- Publisher
- 한국지진공학회
- Keywords
- 형상기억합금; 교량; 지진변위제어장치; 휨 거동; Shape Memory Alloy; Bridges; Seismic Restrainer; Bending Behavior
- Citation
- 한국지진공학회논문집, v.11, no.5, pp.23 - 32
- Journal Title
- 한국지진공학회논문집
- Volume
- 11
- Number
- 5
- Start Page
- 23
- End Page
- 32
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/23813
- ISSN
- 1226-525X
- Abstract
- The goal of this study is to perform several bending tests on a shape memory alloy bar and to analyze the characteristics of the bending behavior. The other goal is to verify the seismic performance of an SMA bar bending application. Single and double bending tests were conducted with varying loading speeds and maximum displacement. The loading and the unloading stiffness were estimated from the force-displacement curves and the equivalent damping ratio of each test was also assessed. In single bending, the SMA bar showed the stiffness hardening after the displacement of 32 mm. It is assumed that this phenomenon is due to the stress-induced-martensite hardening. The increasing loading speed did not influence on the stiffness of the single bending SMA bar. The stiffness of the double bending bar is about 5 times of that of the single bending. This study introduced a seismic application of SMA bending bars as seismic restrainers for bridges and showed its practicality. SMA bars in bending are used for seismic restrainers in a three-span-simply-supported bridge. They showed the effectiveness to reduce the responses of the bridge and the applicability for a seismic restrainer. The significance of this study is to provide basic knowledge of SMA bending and its seismic applications.
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Collections - College of Engineering > Civil and Environmental Engineering > Journal Articles
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