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http://dx.doi.org/10.7734/COSEIK.2016.29.5.377

Embedment Effect of Foundation on the Response of Base-Isolated NPP Structure  

Lee, Eun-Haeng (Department of Civil and Environmental Engineering, Chonnam National Univ.)
Kim, Jae-Min (Department of Marine and Civil Engineering, Chonnam National Univ.)
Lee, Sang-Hoon (KEPCO E&C)
Kim, Jae-Hee (KEPCO E&C)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.29, no.5, 2016 , pp. 377-388 More about this Journal
Abstract
This study is aimed to evaluate the embedment effect of foundation as compared to the surface foundation on the response of a base-isolated nuclear power plant structure. For this purpose, the boundary reaction method (BRM), which is a two-step frequency domain and time domain technique, is used for the nonlinear SSI analysis considering nonlinear behavior of base isolators. The numerical model of the BRM is verified by comparing the numerical results obtained by the BRM and the conventional frequency-domain SSI analysis for an equivalent linear SSI system. Finally, the displacement response of the base isolation and the horizontal response of the structure obtained by the nonlinear SSI analysis using the moat foundation model are compared with those using the surface foundation model. The comparison showed that the displacement response of the base isolation can be reduced by considering the embedment effect of foundation.
Keywords
nonlinear soil-structure interaction; boundary reaction method; viscoelastic boundary; ANSYS; KIESSI-3D;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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