Loading...

Anisotropic dynamic loading effects on unsaturated sand shear modulus prepared at different compaction water contents

Khorami, S ; Sharif University of Technology | 2024

73 Viewed
  1. Type of Document: Article
  2. DOI: 10.1061/9780784485309.050
  3. Publisher: 2024
  4. Abstract:
  5. Dynamic properties of soil, such as shear modulus and damping ratio, are necessary for analyzing the dynamic response of the soil in geostructures. This study investigates the effects of partially inherent anisotropy and stress-induced anisotropy on the shear stiffness of unsaturated soil through a series of dynamic hollow cylinder tests at medium strain levels. The different inherent anisotropy in tested sand specimens was introduced through different compaction water contents in the sample preparation stage while keeping the void ratio nearly constant. Moreover, the influences of the angle of maximum principal stress, α, and intermediate principal stress parameter, b = (σ2 − σ3)/(σ1 − σ3), as stress-induced anisotropy parameters are examined at the dynamic loading stage. The experimental results suggested that the b-parameter has no noticeable influence on shear modulus. On the contrary, shear modulus values showed a peak by changing the value of α from 15° to 75°, with symmetric trends with respect to α = 45°. The impact of compaction water content on the stiffness-α trend was negligible, whereas it affected the stiffness-b to some extent. © ASCE
  6. Keywords:
  7. Anisotropy ; Compaction ; Dynamic loads ; Dynamics ; Shear flow ; Shear strain ; Soil testing ; Soils ; Stiffness ; Stress analysis ; Water content ; Damping ratio ; Dynamic loading effects ; Dynamics properties ; Geostructures ; Inherent anisotropy ; Modulus ratio ; Shear stiffness ; Stress-induced anisotropy ; Unsaturated sand ; Unsaturated soil ; Elastic moduli
  8. Source: Geotechnical Special Publication ; Volume 2024-February, Issue GSP 348 , 2024 , Pages 488-498 ; 08950563 (ISSN); 978-078448530-9 (ISBN); 978-078448531-6 (ISBN); 978-078448532-3 (ISBN); 978-078448533-0 (ISBN); 978-078448534-7 (ISBN); 978-078448535-4 (ISBN)
  9. URL: https://ascelibrary.org/doi/10.1061/9780784485309.050