Nonlinear behavior simulation of soil-structure interaction system via real-time hybrid testing

Soil-structure interaction (SSI) can potentially compromise structures that are subjected to seismic excitation. In recent years, real-time hybrid testing (RTHT) has been used to study soil-structure interaction. However, a very simple soil model has been adopted in existing hybrid testing, which ca...

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Bibliographic Details
Published in:Bulletin of earthquake engineering 2022-09, Vol.20 (11), p.6109-6128
Main Authors: Tang, Zhenyun, Liu, Hao, Dietz, Matt, Chatzigogos, Charisis T., Du, Xiuli
Format: Article
Language:English
Subjects:
Accuracy
Civil Engineering
Dynamic tests
Earth and Environmental Science
Earth Sciences
Earthquakes
Environmental Engineering/Biotechnology
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Hybrid systems
Hydrogeology
Laboratories
Nonlinear systems
Nonlinearity
Original Article
Real time
Seismic response
Seismic stability
Shake table tests
Simulation
Soil
Soil dynamics
Soil stability
Soil testing
Soil-structure interaction
Soils
Stability analysis
Structural Geology
Testing
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Summary:Soil-structure interaction (SSI) can potentially compromise structures that are subjected to seismic excitation. In recent years, real-time hybrid testing (RTHT) has been used to study soil-structure interaction. However, a very simple soil model has been adopted in existing hybrid testing, which cannot simulate nonlinear effects in a soil-foundation system under vigorous seismic shaking. To study the stability and accuracy of RTHT for nonlinear SSI and to evaluate the dynamic impact of soil nonlinearity on an SSI system, real-time hybrid shaking table testing was performed based on full-state control via simulation (FSCS), in which the soil-foundation system was simulated using a macroelement model. The results demonstrate that FSCS-controlled RTHT is an effective approach for investigating nonlinear SSI. The nonlinear characteristics of the numerical substructure had little influence on the stability and accuracy of RTHT for nonlinear SSI systems, but the nonlinear characteristics of the soil had a positive effect on the structural seismic response. An effective dynamic testing method was proposed for the SSI studies.
ISSN:1570-761X
1573-1456
DOI:10.1007/s10518-022-01429-5