RISS 검색 - 국내학술지논문 상세보기

다국어 초록 (Multilingual Abstract)

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.

참고문헌 (Reference)

1 Cheng Chen, "Tracking Error-Based Servohydraulic Actuator Adaptive Compensation for Real-Time Hybrid Simulation" American Society of Civil Engineers (ASCE) 136 (136): 432-440, 2010

2 M. I. Wallace, "Stability analysis of real-time dynamic substructuring using delay differential equation models" Wiley 34 (34): 1817-1832, 2005

3 Ruiyang Zhang, "Shake table real-time hybrid simulation techniques for the performance evaluation of buildings with inter-story isolation" Wiley 24 (24): e1971-, 2017

4 P.J. Gawthrop, "Robust real-time substructuring techniques for under-damped systems" Wiley 14 (14): 591-608, 2007

5 Ge Ou, "Robust integrated actuator control: experimental verification and real-time hybrid-simulation implementation" Wiley 44 (44): 441-460, 2015

6 Masayoshi Nakashima, "Real-time on-line test for MDOF systems" Wiley 28 (28): 393-420, 1999

7 Pengfei Shi, "Real-time hybrid testing with equivalent force control method incorporating Kalman filter" Wiley 23 (23): 735-748, 2016

8 T. Horiuchi, "Real-time hybrid experimental system with actuator delay compensation and its application to a piping system with energy absorber" Wiley 28 (28): 1121-1141, 1999

9 Y.N Kyrychko, "Real-time dynamic substructuring in a coupled oscillator–pendulum system" The Royal Society 462 (462): 1271-1294, 2006

10 A. P. Darby, "Real-Time Substructure Tests Using Hydraulic Actuator" American Society of Civil Engineers (ASCE) 125 (125): 1133-1139, 1999