Performance of geotechnical seismic isolation system using rubber-soil mixtures in centrifuge testing

Hing Ho Tsang, Duc Phu Tran, Wen Yi Hung, Kyriazis Pitilakis, Emad F. Gad

研究成果: 雜誌貢獻期刊論文同行評審

10 引文 斯高帕斯(Scopus)

摘要

Geotechnical seismic isolation (GSI) system involves the dynamic interaction between structure and low-modulus foundation material, such as rubber-soil mixtures (RSM). Whilst numerical studies have been carried out to demonstrate the potential benefits of GSI-RSM system, experimental research is indispensable for confirming its isolation mechanism and effectiveness in reducing structural demand. In this regard, centrifuge modelling with an earthquake shaker under an acceleration field of 50 g adopted in this study can mimic the actual nonlinear dynamic response characteristics of RSM and subsoil in a coupled soil-foundation-structure system. This is the first time the performance of GSI-RSM system was examined in a geotechnical centrifuge. It was found that an average of 40-50% reduction of structural demand can be achieved. The increase in both the horizontal and rotation responses of the foundation was also evidenced. The unique augmented rocking mechanism with reversible foundation rotation was highlighted.

原文???core.languages.en_GB???
頁(從 - 到)1271-1289
頁數19
期刊Earthquake Engineering and Structural Dynamics
50
發行號5
DOIs
出版狀態已出版 - 25 4月 2021

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