Mechanics of Soils as Particulate Media Under Moving Loads
Abstract
This study investigated the mechanism of stress and deformation in particulate materials under repeated application of moving surface loads. It consisted of two complimentary phases: the theoretical development of model to characterize the propagation of stress and deformation in the medium anf the experimental investigation of its adequacy. The research project built on the earlier work of bourdeau, who brought together the probabilistic concept of stress transmission in granular bodies (Harr) and the analogous stochastically based deformation mechanism proposed by Litwiniszyn, to investigate the response of particulate material to vertically applied slowly moving surface loadings. The perceived advantage of this methodology is that the response of granular materials may be characterized by a very few parameters, whereas the older stress-dilatancy and yield theories abound in extra parameters. A fine dry silt soil was tested under both repeated static loading and quasi-mobile loading. An array of lead shot was placed periodically throughout the soil body, and records were made of the deformation of the soil under the surface applied loading through exposure of the soil model to X-rays, The conclusion was drawn that response of dry granular material to vertically applied moving loads is one-dimensional, and the magnitude of deformation may be estimated from an equivalent static loading.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 18, 1989
- Accession Number
- ADA212856
Entities
People
- Brian Coree
- Milton E. Harr
Organizations
- Purdue University