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http://dx.doi.org/10.7843/kgs.2019.35.12.135

Analysis of Response Characteristics According to Permanent Displacement in Seismic Slope  

Ahn, Jae-Kwang (Earthquake and Volcano Research Division, KMA)
Park, Sangki (Multi-Disaster Countermeasures Organization, KICT)
Kim, Wooseok (Dept. of Infrastructure Safety Research, KICT)
Son, Su-Won (Seismic Simulation Test Center, Pusan National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.35, no.12, 2019 , pp. 135-145 More about this Journal
Abstract
The slope collapse can be classified into internal and external factors. Internal factors are engineering factors inherent in the formation of slopes such as soil depth, slope angle, shear strength of soil, and external factors are external loading such as earthquakes. The external factor for earthquake can be expressed by various values such as peak ground acceleration (PGA), peak ground velocity (PGV), Arias coefficient (I), natural period (Tp), and spectral acceleration (SaT=1.0). Specially, PGA is the most typical value that defines the magnitude of the ground motion of an earthquake. However, it is not enough to consider the displacement in the slope which depends on the duration of the earthquake even if the vibration has the same peak ground acceleration. In this study, numerical analysis of two-dimensional plane strain conditions was performed on engineered block, and slope responses due to seismic motion of scaling PGA to 0.2 g various event scenarios was analyzed. As a result, the response of slope is different depending on the presence or absence of sliding block; it is shown that slope response depend on the seismic wave triggering sliding block than the input motion factors.
Keywords
Numerical analysis; Plastic model; Seismic analysis; Sliding block; Slope;
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