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Dynamic and Static Behavior of Anchored-block Flexible Retaining Structures

Eskandari, Nina | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45757 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Haeri, Mohsen
  7. Abstract:
  8. Deformation induced by deep excavations is one of the most important factors in investigating function of retaining structure constructed in urban areas. Predicting content of deformation induced by deep excavations is a fundamental and important step in designing of retaining structures. A prestressed grouted ground anchor is a structural element installed in soil or rock that is used to transmit an applied tensile load into the ground. In this study, effective factors in deformation induced by deep excavation reinforced by method of anchoring is analyzed by application of numerical study based on finite element method by using PLAXIS software, and results are compared. The seismic performance of soil-anchored walls is also numerically assessed using FLAC software. A parametric study is conducted to show the effect of design parameters of the Soil-anchored walls such as wall height, soil type and input load’s frequency on the magnitude of critical seismic coefficient. In addition, the value of critical seismic coefficient propsed by FHWA is compared with that extracted from analysis of this study. The result of this study indicates that the critical seismic coefficient not only depends on the lateral deformation but also relies on the wall height,natural frequency of the wall and dominant frequency of input seismic loading. The magnitude of critical seismic coefficient decreases when the height of the wall increases. The magnitude of critical seismic coefficient significantly increases when the applied excitation frequency approaches the natural frequency of the Soil-Nailed wall. The result of this study can be used by engineers for more economical seismic design of Soil-anchored walls
  9. Keywords:
  10. Deformation ; Critical Seismic Coefficient ; Dynamic Analysis ; Static Analysis ; Anchored Walls ; Prestressed Concrete

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