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Open AccessArticle

Numerical Study on Dynamic Response of a Horizontal Layered-Structure Rock Slope under a Normally Incident Sv Wave

by Zhifa Zhan 1,2 and Shengwen Qi 1,2,*
1
University of Chinese Academy of Sciences, Beijing 100049, China
2
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2017, 7(7), 716; https://doi.org/10.3390/app7070716
Received: 7 April 2017 / Revised: 30 June 2017 / Accepted: 4 July 2017 / Published: 11 July 2017
Several post-earthquake investigations have indicated that the slope structure plays a leading role in the stability of rock slopes under dynamic loads. In this paper, the dynamic response of a horizontal layered-structure rock slope under harmonic Sv wave is studied by making use of the Fast Lagrangian Analysis of Continua method (FLAC). The suitability of FLAC for studying wave transmission across rock joints is validated through comparison with analytical solutions. After parametric studies on Sv wave transmission across the horizontal layered-structure rock slope, it is found that the acceleration amplification coefficient η, which is defined as the ratio of the acceleration at the monitoring point to the value at the toe, wavily increases with an increase of the height along the slope surface. Meanwhile, the fluctuation weakens with normalized joint stiffness K increasing and enhances with normalized joint spacing ξ increasing. The acceleration amplification coefficient of the slope crest ηcrest does not monotonously increase with the increase of ξ, but decreases with the increase of K. Additionally, ηcrest is more sensitive to ξ compared to K. From the contour figures, it can also be found that the contour figures of η take on rhythm, and the effects of ξ on the acceleration amplification coefficient are more obvious compared to the effects on K. View Full-Text
Keywords: horizontal layered-structure rock slope; normalized fracture stiffness; dimensionless fracture spacing; dynamic response; Fast Lagrangian Analysis of Continua method (FLAC); numerical simulation horizontal layered-structure rock slope; normalized fracture stiffness; dimensionless fracture spacing; dynamic response; Fast Lagrangian Analysis of Continua method (FLAC); numerical simulation
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MDPI and ACS Style

Zhan, Z.; Qi, S. Numerical Study on Dynamic Response of a Horizontal Layered-Structure Rock Slope under a Normally Incident Sv Wave. Appl. Sci. 2017, 7, 716.

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