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http://dx.doi.org/10.12989/sss.2021.28.1.105

Advancing real-time hybrid simulation for coupled nonlinear soil-isolator-structure system  

Li, Hongwei (Key Laboratory of C&PC Structures of the Ministry of Education, Southeast University)
Maghareh, Amin (School of Mechanical Engineering, Purdue University)
Uribe, Johnny W.C. (Lyles School of Civil Engineering, Purdue University)
Montoya, Herta (Lyles School of Civil Engineering, Purdue University)
Dyke, Shirley J. (School of Mechanical Engineering, Purdue University)
Xu, Zhaodong (Key Laboratory of C&PC Structures of the Ministry of Education, Southeast University)
Publication Information
Smart Structures and Systems / v.28, no.1, 2021 , pp. 105-119 More about this Journal
Abstract
Experiments involving soil-structure interaction are often constrained by the capacity and other limitations of the shake table. Additionally, it is usually necessary to consider different types of soil in experiments. Real-time hybrid simulation (RTHS) offers an alternative method to conduct such tests. RTHS is a cyber-physical testing technique that splits the dynamic system under investigation into numerical and physical components, and then realistically couples those components in a single test. A limited number of previous studies involving soil-structure interaction have been conducted using RTHS, with a focus on linear models and systems. The presence of isolators was not considered in these studies to the authors' best knowledge. Herein, we aim to advance the understanding of the RTHS method by developing and demonstrating its use for nonlinear soil-isolator-structure systems. A sliding mode controller able to deal with both system nonlinearities and wide range of potential uncertainties in such tests is designed and validated using a nonlinear shake table with a nonlinear specimen. By simply changing the numerical model and using the same controller and experimental setup, different soil types and ground motions can readily be considered with this approach. Numerical and RTHS results are compared for verification purposes.
Keywords
nonlinear dynamics; nonlinear shake table; real-time hybrid simulation; sliding isolation; sliding mode control; soil-isolator-structure interaction;
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Times Cited By KSCI : 4  (Citation Analysis)
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