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Title |
Investigating the Influence of Rate Dependency and Axial Force on the Seismic Performance Evaluation of Isolation Bearing
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Authors |
박민석(Minseok Park) ; 채윤병(Yunbyeong Chae) ; 김철영(Chul-Young Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.6.22 |
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Keywords |
축력; 반복 가력 실험; 면진 받침; 속도 의존성; 실시간 하이브리드 실험; 내진성능평가 Axial force; Cyclic test; Isolation bearing; Rate dependency; Real-time hybrid simulation; Seismic performance evaluation |
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Abstract |
In the evaluation of seismic performance for structural materials and components, the loading rate and axial force can have a significant impact. Due to time-delay effects between input and output displacements, It is difficult to apply high-rate displacement in cyclic tests and hybrid simulations. Additionally, the difficulty of maintaining a consistent vertical load in the presence of lateral displacement has limited fast and real-time tests performed while maintaining a constant vertical load. In this study, slow, fast cyclic tests and real-time hybrid simulations were conducted to investigate the rate dependency and the influence of vertical loads of Isolation Bearing. In the experiment, the FLB System including an Adaptive Time Series (ATS) compensation and a state estimator was constructed for real-time control of displacement and vertical load. It was found that the vertical load from the superstructure and loading rate can have a significant impact on the strength of the seismic isolation bearing and its behavior during an earthquake. When conducting experiments for seismic performance evaluation, they must be implemented to be similar to reality. This study demonstrates the excellent performance of the system built and used for seismic performance evaluation and enables accurate and efficient seismic performance evaluation.
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