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http://dx.doi.org/10.5000/EESK.2021.25.4.169

Effect of a Sunken Mat Foundation on the Horizontal Design Spectrum of a Structure  

Kim, Yong-Seok (Department of Architectural Engineering, Mokpo National University)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.25, no.4, 2021 , pp. 169-177 More about this Journal
Abstract
In this paper, horizontal seismic responses of a structure built on a sunken mat foundation were compared with those built on a solid embedded mat foundation to investigate the effect of a sunken mat foundation on the horizontal response of a structure. Seismic analyses of a structure laid on the embedded mat foundation were performed by utilizing a pseudo-3D finite element software of P3DASS. Three bedrock earthquake records downloaded from the Pacific Earthquake Engineering Research Center database were scaled to reproduce weak-moderate earthquakes. Weak, medium, and stiff soil layers were considered for the seismic analyses of the structure-foundation-soil system. Parametric studies were performed for foundation radius, foundation embedment depth, and shear wave velocity of a soil layer to investigate their effect on the seismic response spectrum. The study result showed that the design spectrum of a structure built on a sunken mat foundation was similar to that with a solid embedded mat foundation showing a slight difference due to almost the same seismic base motion beneath both embedded foundations.
Keywords
Sunken mat foundation; Solid embeddded mat foundation; 3D finite element; P3DASS; Seismic base motion;
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