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A Numerical Investigation of the Bearing Capacity of Shallow Foundations on Salt-Encrusted Flat Sabkha

Creator:: Refaei, Raied
Abstract:: Salt-encrusted flats, or Sabkha, are common in arid and semi-arid regions worldwide, including coastal and inland areas. Due to their low shear strength and high compressibility, these soils are often unsuitable for supporting infrastructure or structures. The unique salt content of sabkha formations sets them apart from other soil types....
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ T. Matthew Evans

Numerical Simulations and Microscale Analyses of Offshore Anchor-Granular Material Systems

Creator:: Zhang, Nan
Abstract:: Anchoring systems are used to hold floating offshore devices (e.g., energy devices, oil platforms) to keep them on their stations. Anchors are embedded into the seabed soils. In some cases, the interface shear between anchor and seabed soils together with anchor self-weight provide the holding capacity of the anchoring systems....
Resource Type:: Dissertation
Full Text:: approved: ______________________________________________________ T. Matthew Evans Anchoring systems

A New Bonding Model for the Particulate Simulation of Bio-Cemented Sand (with a Side Excursion on Percolation in Granular Mixtures)

Creator:: Khoubani, Ali
Abstract:: Bio-cementation is a promising method for the liquefiable mitigation of loose saturated sands. In the improvement process a bacterium that can be found naturally in soil deposits is fed urea. The bacterium consumes and breaks down the urea to form ammonium and carbonate. In the presence of calcium, calcium carbonate...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ T. Matthew Evans Bio-cementation is a promising method for the liquefiable mitigation of

Behavioral thresholds in mixtures of sand and clay

Creator:: Simpson, Daniel Corder
Abstract:: Nearly all soils are comprised of mixtures of coarse and fine particles. Behavior under mechanical and thermal loading of soil is strongly influenced (and in some cases, governed) by the ratio of coarse to fine particles. A better understanding of the fundamental behavior of soil mixtures will provide insight to...
Resource Type:: Masters Thesis
Full Text:: Title: Behavioral Thresholds in Mixtures of Sand and Clay Abstract approved: T. Matthew Evans

Engineering Behavior of Remolded Diatomaceous Silts

Creator:: Pitso, Talenta
Abstract:: Diatomaceous soils are a geological material whose engineering properties do not readily conform to the widely accepted and used mechanical and behavioral frameworks. This ambiguity results in design difficulties and geotechnical failures which can be costly. Diatomaceous soils have diatoms in their matrix. Diatoms are unicellular algae with an inert...
Resource Type:: Capstone Project
Full Text:: my sincerest appreciation and gratitude to my advisor, Dr. Matt Evans, for his endless

Unsaturated Soils and Foundation Design : Theoretical Considerations for an Effective Stress Framework

Creator:: Baker, Josiah D.
Abstract:: This study presents the theoretical background necessary to model the bearing capacity of shallow and deep foundations in partially saturated soils. The conventional bearing capacity equations for shallow and deep foundations and the 𝛽-method for deep foundation side resistance have been modified to include the effects of matric suction and...
Resource Type:: Masters Thesis
Full Text:: Considerations for an Ef- fective Stress Framework Abstract approved: T. Matthew Evans This

GOSEP: Georeferenced Oregon Soil Engineering Properties

Creator:: Dutille, Victoria L.
Abstract:: Geotechnical engineers design and analyze the interface between the natural and built environments, often based on uncertain and inherently variable data due to the nature of the building material, soil. Engineers must estimate the subsurface conditions at a site using historical, in-situ, and laboratory testing data. However, only discrete representative...
Resource Type:: Capstone Project
Full Text:: : ______________________________________________________ Dr. T. Matthew Evans and Dr. Armin Stuedlein Geotechnical engineers design and analyze the

Characterization of the Small-Strain Stiffness of Soils at an In-situ Liquefaction Test Site

Creator:: Donaldson, Aleyna M.
Abstract:: Strong ground motions from earthquakes can result in the reduction of the shear modulus and wave propagation characteristics of soils, and can produce liquefaction and cyclic softening during shaking and for some time following the seismic event. While the ground motions produced from controlled blasting are different than those in...
Resource Type:: Masters Thesis
Full Text:: Armin W. Stuedlein T. Matthew Evans Strong ground motions from earthquakes can result in

Evaluation and Modification of a Thixotropic Fluid Model for Liquefaction Triggering with Application to Laboratory Tests and Lateral Spreading

Creator:: Brown, Tovey M.
Abstract:: Earthquake-induced liquefaction is a large contributor to damage observed following seismic events. Commonly observed damage consists of significant ground and structural failure due to the deformation of large volumes of soil due to soil liquefaction and lateral spreading. A significant focus of geotechnical seismic research concentrates on the development and...
Resource Type:: Capstone Project

The role of costimulation and adjuvants in the development of T cell effector and memory responses

Creator:: Maxwell, Joseph R.
Abstract:: T cells are one of the key cells in the immune system. Although they are not the first line of defense against a pathogen, their functions can greatly enhance the phagocytosis and destruction of pathogens as well as the development of antibody responses. Furthermore, even when responding T cells have...
Resource Type:: Dissertation
Full Text:: Costimulation and Adjuvants in the Development of T Cell Effector and Memory Responses. Abstract approved

ScholarsArchive@OSU

A Numerical Investigation of the Bearing Capacity of Shallow Foundations on Salt-Encrusted Flat Sabkha

Numerical Simulations and Microscale Analyses of Offshore Anchor-Granular Material Systems

A New Bonding Model for the Particulate Simulation of Bio-Cemented Sand (with a Side Excursion on Percolation in Granular Mixtures)

Behavioral thresholds in mixtures of sand and clay

Engineering Behavior of Remolded Diatomaceous Silts

Unsaturated Soils and Foundation Design : Theoretical Considerations for an Effective Stress Framework

GOSEP: Georeferenced Oregon Soil Engineering Properties

Characterization of the Small-Strain Stiffness of Soils at an In-situ Liquefaction Test Site

Evaluation and Modification of a Thixotropic Fluid Model for Liquefaction Triggering with Application to Laboratory Tests and Lateral Spreading

The role of costimulation and adjuvants in the development of T cell effector and memory responses

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