Dynamic response of loess slope with uniform and isotropic layers to shear waves with different incident directions

2013 ◽  
pp. 845-849
Author(s):  
F Xiong ◽  
R Huang ◽  
J Sun ◽  
S Dong ◽  
M Hao ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Shear Waves ◽  
Loess Slope

scholarly journals Wave polarization and dynamic degeneracy in a chiral elastic lattice

2019 ◽  
Vol 475 (2232) ◽  
pp. 20190313 ◽  
Author(s):  
G. Carta ◽  
I. S. Jones ◽  
N. V. Movchan ◽  
A. B. Movchan
Keyword(s):  
Dynamic Response ◽  
Shear Waves ◽  
Low Frequency ◽  
Elementary Cell ◽  
Periodic Lattice ◽  
Wave Polarization ◽  
Lattice Systems ◽  
Systematic Analysis ◽  
Practical Applications ◽  
Elastic Lattice

This paper addresses fundamental questions arising in the theory of Bloch–Floquet waves in chiral elastic lattice systems. This area has received a significant attention in the context of ‘topologically protected’ waveforms. Although practical applications of chiral elastic lattices are widely appreciated, especially in problems of controlling low-frequency vibrations, wave polarization and filtering, the fundamental questions of the relationship of these lattices to classical waveforms associated with longitudinal and shear waves retain a substantial scope for further development. The notion of chirality is introduced into the systematic analysis of dispersive elastic waves in a doubly-periodic lattice. Important quantitative characteristics of the dynamic response of the lattice, such as lattice flux and lattice circulation, are used in the analysis along with the novel concept of ‘vortex waveforms’ that characterize the dynamic response of the chiral system. We note that the continuum concepts of pressure and shear waves do not apply for waves in a lattice, especially in the case when the wavelength is comparable with the size of the elementary cell of the periodic structure. Special critical regimes are highlighted when vortex waveforms become dominant. Analytical findings are accompanied by illustrative numerical simulations.

scholarly journals Dynamic Response Law of Loess Slope with Different Shapes

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Zhixin Yan ◽  
Sen Zhang ◽  
Xuedong Zhang ◽  
Ping Jiang
Keyword(s):  
Dynamic Response ◽  
Construction Projects ◽  
Reference Value ◽  
Northwest China ◽  
Scientific Basis ◽  
Slope Ratio ◽  
Loess Slope ◽  
Theoretical Support ◽  
Ratio Change ◽  
Different Shapes

Loess slope broadly distributes in Northwest China, making the slope of the area developed. And with the development number of construction projects still on the rise, this area is a high-intensity region with multiple earthquakes, resulting in landslide under earthquakes which is a very serious problem. However, the study on the loess slope dynamic response yet rarely involved the exploration of the influence of slope shapes, which leaves a hidden danger to the safety of local engineering. In this paper, a typical ladder-type loess slope in engineering is selected as a research object, and a numerical simulation model is established with FLAC3D program. The dynamic response of the loess slope with different shapes is studied deeply and systematically. Found a series phenomenon of earthquake response of loess slope with stepped slope series, the width of the platform and the slope ratio change under earthquakes. Meanwhile, the law of slope parameters such as slope series, platform width, and slope ratio on dynamic response of loess slope is revealed. The results provide theoretical support and scientific basis for the construction of the relevant projects in the area, which has important reference value to the safety of the engineering and the development of economic society.

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