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http://dx.doi.org/10.7843/kgs.2020.36.11.61

Validation of Equivalent Shear Beam Container Using Dynamic Centrifuge Tests  

Kim, Yoon-Ah (Dept. of Civil & Environmental Engrg., KAIST)
Lee, Hae-In (The 4th R&D Institute, Agency for Defense Development)
Ko, Kil-Wan (Dept. of Civil & Environmental Engrg., KAIST)
Kim, Dong-Soo (Dept. of Civil & Environmental Engrg., KAIST)
Publication Information
Journal of the Korean Geotechnical Society / v.36, no.11, 2020 , pp. 61-70 More about this Journal
Abstract
In dynamic centrifuge tests, equivalent shear beam (ESB) container minimizes the boundary effect between the soil model and the wall of the container so as to effectively simulate the boundary conditions of real field state. The ESB container at KAIST was evaluated to be performing properly by Lee et al. (2013). However, it is necessary to re-evaluate the performance of ESB container since the ESB container may have deteriorated over time. Thus, the performance of eight-year-old ESB container was re-evaluated through dynamic centrifuge tests. Firstly, the natural period of the empty ESB container was compared with the results of Lee et al. (2013). Then the boundary effect of sand-filled ESB container was evaluated. Results show that the dynamic behavior of the sand-filled ESB container was similar to that of the ground, despite a decrease in the natural period of the empty ESB container over time. In addition, the dynamic response of the ground built in the ESB container and the same ground simulated through numerical analysis with free-field boundary conditions were similar. Therefore, it was found that the boundary effect of the ESB container due to the decrease in the natural period was not significant.
Keywords
Boundary effect; Dynamic centrifuge test; Equivalent shear beam container;
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