4.1 Review

Influence of Surface Roughness and Particle Characteristics on Soil-Structure Interactions: A State-of-the-Art Review

Journal

GEOSCIENCES
Volume 12, Issue 4, Pages -

Publisher

MDPI
DOI: 10.3390/geosciences12040145

Keywords

interface shear test; surface roughness; critical roughness; random or ribbed surface roughness; friction development; PIV technology

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The study of soil-structure interface behavior is important for understanding engineering performance and optimizing foundation design. Previous research has shown that surface roughness significantly affects interface shear performance in soil-structure interactions. This study used advanced instruments to investigate material surface roughness and validated a soil shearing model using digital imaging technology. Machine learning and numerical modeling have the potential to further advance research on interface shear mechanisms and enhance understanding of complex soil-structure interactions.
The study of soil-structure interface behavior contributes to the fundamental understanding of engineering performance and foundation design optimization. Previous research studies the effect of soil characteristics and surface roughness property on the soil-material interface mechanism via interface shear test. The reviews utilizing past established laboratory studies and more recent tests based on state-of-the-art technologies reveal that surface roughness significantly affects interface shear performances in the studies of soil-structure interactions, especially in peak shear strength development. A preliminary but original investigative study by the authors was also carried out using a sophisticated portable surface roughness gauge to define the material surface roughness properties in order to study the interface behavior parametrically. Additionally, using the authors' own original research findings as a proof-of-concept innovation, particle image velocimetry (PIV) technology is applied using a digital single-lens reflex (DSLR) camera to capture sequential images of particle interactions in a custom-built transparent shear box, which validate the well-established four-stage soil shearing model. The authors also envisaged that machine learning, e.g., artificial neural network (ANN) and Bayesian inference method, amongst others, as well as numerical modeling, e.g., discrete element method (DEM), have the potential to also promote research advances on interface shear mechanisms, which will assist in developing a greater understanding in the complex study of soil-structure interactions.

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