Effect of dynamic soil properties and frequency content of harmonic excitation on the internal stability of reinforced soil retaining structure
| Autor: | Anindya Pain, S. K. Bhattacharyya, Deepankar Choudhury |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Damping ratio
Earthquake Materials science Seismic Response Horizontal Slice Method 0211 other engineering and technologies Amplification 02 engineering and technology Modular-Block Slopes Modified Pseudodynamic Method Wall Models Reinforced Retaining Wall Shaking Table Tests Reliability Assessment General Materials Science Boundary value problem Reinforcement 021101 geological & geomatics engineering Civil and Structural Engineering Parametric statistics 021110 strategic defence & security studies business.industry Structural engineering Geosynthetics Geotechnical Engineering and Engineering Geology Backfill Limit Equilibrium Method Visco-Elastic Model Nonlinear system Amplitude Shear (geology) Numerical-Analysis business Excitation |
| Zdroj: | Geotextiles and Geomembranes. 45:471-486 |
| ISSN: | 0266-1144 |
| DOI: | 10.1016/j.geotexmem.2017.07.003 |
| Popis: | The effect of dynamic soil properties and frequency content of harmonic excitation on the internal stability of reinforced soil retaining structure is investigated. Arc of a log-spiral is considered as the failure surface in the present limit equilibrium analysis. Backfill and reinforced soil is modeled as a viscoelastic material. The whole structure is considered to be resting on a rigid stratum. Backfill soil and the reinforced soil retaining structure are subjected to harmonic shaking at the base. Present methodology satisfies the stress boundary condition at the ground surface. In the present study, amplitude and phase of the horizontal and vertical seismic accelerations change with depth and the variation of accelerations along the depth is found to be time dependent and nonlinear. All the four possible combinations of horizontal and vertical seismic inertia force directions are considered to determine the total reinforcement force and critical length of the reinforcement. In the present study, amplification of accelerations towards the ground surface depends on the dynamic soil properties and frequency content of input excitation. Detailed parametric study is done to understand their implications on the solution. An algorithm is proposed at the end of this paper which uses strain dependent equivalent linear values of shear wave velocity (V-s) and damping ratio (xi) to compute the total reinforcement force and critical length of the reinforcement. The limitation of equivalent linear based approach is that it only considers vertically propagating shear wave. Comparison of present method with other theories is also presented showing the merit of the present study. (C) 2017 Elsevier Ltd. All rights, reserved. |
| Databáze: | OpenAIRE |
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