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논문 기본 정보

자료유형
학술저널
저자정보
Muammer Avci (University of Connecticut) Rui M. Botelho (University of Connecticut) Richard Christenson (University of Connecticut)
저널정보
국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.25 No.2
발행연도
2020.1
수록면
155 - 167 (13page)

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This paper demonstrates a real-time hybrid substructuring (RTHS) shake table test to evaluate the seismic performance of a base isolated building. Since RTHS involves a feedback loop in the test implementation, the frequency dependent magnitude and inherent time delay of the actuator dynamics can introduce inaccuracy and instability. The paper presents a robust stability and performance analysis method for the RTHS test. The robust stability method involves casting the actuator dynamics as a multiplicative uncertainty and applying the small gain theorem to derive the sufficient conditions for robust stability and performance. The attractive feature of this robust stability and performance analysis method is that it accommodates linearized modeled or measured frequency response functions for both the physical substructure and actuator dynamics. Significant experimental research has been conducted on base isolators and dampers toward developing high fidelity numerical models. Shake table testing, where the building superstructure is tested while the isolation layer is numerically modeled, can allow for a range of isolation strategies to be examined for a single shake table experiment. Further, recent concerns in base isolation for long period, long duration earthquakes necessitate adding damping at the isolation layer, which can allow higher frequency energy to be transmitted into the superstructure and can result in damage to structural and nonstructural components that can be difficult to numerically model and accurately predict. As such, physical testing of the superstructure while numerically modeling the isolation layer may be desired. The RTHS approach has been previously proposed for base isolated buildings, however, to date it has not been conducted on a base isolated structure isolated at the ground level and where the isolation layer itself is numerically simulated. This configuration provides multiple challenges in the RTHS stability associated with higher physical substructure frequencies and a low numerical to physical mass ratio. This paper demonstrates a base isolated RTHS test and the robust stability and performance analysis necessary to ensure the stability and accuracy. The tests consist of a scaled idealized 4-story superstructure building model placed directly onto a shake table and the isolation layer simulated in MATLAB/Simulink using a dSpace real-time controller.
#Real-time hybrid substructuring #base isolation #robust stability

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참고문헌 (31)

참고문헌 신청
Ali Ashasi-Sorkhabi / 2013 / Implementation and verification of real-time hybrid simulation (RTHS) using a shake table for research and education / Journal of Vibration and Control 21(8):1459~1472 Crossref Botelho, R. B. / 2013 / Exact Stability Analysis for Uniaxial Real-Time Hybrid Simulation of 1-DOF and 2-DOF Structural Systems / Engineering Mechanics Institute Conference google schola Carrion, J. E. / 2007 / Model-based strategies for real-time hybrid testing google schola Yunbyeong Chae / 2013 / Adaptive time series compensator for delay compensation of servo-hydraulic actuator systems for real-time hybrid simulation / Earthquake Engineering & Structural Dynamics 42(11):1697~1715 Crossref Cheng Chen / 2009 / Analysis of actuator delay compensation methods for real-time testing / Engineering Structures 31(11):2643~2655 Crossref

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