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Comparison of Slopes' Pgds Derived From Newmark Rigid Block Theory With 1g Shaking Table Model Tests

Joshaghani, Mohammad | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44073 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Jafarzadeh, Fardin
  7. Abstract:
  8. Moderate to large magnitude earthquakes trigger hundreds to thousands of slope stability failures and landslides in coherent masses. In many earthquakes, landslides have been responsible for as much or more damage than all other seismic hazards combined. Earthquake-induced landslides have a detrimental impact on the serviceability of slopes by damaging nearby structures, roadways, utilities, power lines and communication networks. In this research large-scale shaking table model tests were conducted to study slope behavior under earthquake conditions on Sharif University shaking table. The model slopes were installed into a model box with a length of 3 m, width of 1 m, and height of 1.5 m. A uniform medium sand was used to conduct models of slopes with unit weight of 15.2 KN/m3 and instrumentation was applied, including accelerometer, strain-gage and LVDT. Performing this study properly, Iai 1989 similitude law was undertaken in conducting models. Models were tested under 5Hz harmonic load in which acceleration was increased during 4 distinct step and displacements of toe and crest of models were measured to compare with those of Newmark rigid sliding block method. It was found that Newmark method provides conservative results which approach to observed ones as the acceleration amplitude increased. This conclusion about rigid block method is well consistent with similar experiences in the literature
  9. Keywords:
  10. Slope ; Landslide ; Babolsar Sand ; Shear Waves Velocity Estimation ; Similitude Law

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