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Filtering by: Creator Stone, R. Remove constraint Creator: Stone, R. Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Wave interaction with rubble mound structures

    Creator:
    Yoo, Chul-hee
    Abstract:
    The objective of this study is the development and verification of an analytical solution for an unsteady flow field partially occupied by a permeable structure. Flow is induced by a small amplitude incident wave train and the permeable structure may contain multilayered anisotropic but homogeneous material. The analytical solution developed...
    Resource Type:
    Masters Thesis
    Full Text:
    , Department. of Commerce, under Grant No. NA86AA-D-SG095 (Project No. R/CE-18). The work was carried out

  • Wave interaction with permeable structures

    Creator:
    Lee, Chung-pan
    Abstract:
    A theory is developed to provide an analytical solution to an unsteady flow field which is partially occupied by a porous structure. The flow is induced by a small amplitude incident wave train. The porous structure may contain multi-layer anisotropic but homogeneous media. Three typical porous structures are investigated: a...
    Resource Type:
    Dissertation
    Full Text:
    given to Mr. David R. Standley, research scientist, and Mr. Terry L. Dibble, research engineer, both of

  • Use of Controlled Blasting to Quantify the Dynamic, In-Situ, Nonlinear Inelastic Response of Soils

    Creator:
    Jana, Amalesh
    Abstract:
    The seismic response of deep deposits of liquefiable and cyclic-softening susceptible soils has presented the geotechnical profession with significant engineering challenges. Strong ground motions may serve to soften soils under cyclic shear, trigger liquefaction, and produce damaging displacements as a consequence. This study improves the understanding of the in-situ, nonlinear,...
    Resource Type:
    Dissertation
    Full Text:
    residual excess pore pressure, ue,r, as well as changes in constitutive responses as a result of

  • Trade-offs between geometric design standards and safety for low volume roads

    Creator:
    Kornsombut, Aram
    Abstract:
    Geometric design standards have not been developed specifically for low volume roads. Design standards and criteria are extrapolated from higher standard roadways that are often not relevant to low volume roads. Safety is a primary criterion used for selection of design standards along with economic, financial, social and environment factors....
    Resource Type:
    Masters Thesis
    Full Text:
    Geometric Design Standards and Safety for Low Volume Roads Abstract approved: Redacted for Privacy Dr. R

  • The use of blended synthetic fibers to reduce cracking risk in high performance concrete (HPC)

    Creator:
    Bañuelos, José
    Abstract:
    High Performance Concrete (HPC) is used in our crucial pieces of infrastructure, such as bridge decks, due to its enhanced durability and engineering properties. However, HPC is highly susceptible to early-age cracking. Cracking within the first months of a bridge deck’s lifespan can severely hinder its long-term performance and durability....
    Resource Type:
    Masters Thesis

  • The seismic vulnerability of sheet pile walls

    Creator:
    McCullough, Nason J.
    Abstract:
    The seismic performance of port structures has been well documented following recent earthquakes, and indicates that port structures are highly susceptible to earthquake-induced damages. These damages are primarily due to soil liquefaction and the associated ground failures. Sheet pile bulkheads provide vital intermodal and lifeline transportation links between water-side and...
    Resource Type:
    Masters Thesis
    Full Text:
    (project no. R/CP-33) from the National Oceanic and Atmospheric Administration to the Oregon State

  • The role of specific surface area and related index properties in the frost susceptibility of soils

    Creator:
    Rieke, Ross D.
    Resource Type:
    Masters Thesis
    Full Text:
    factor, Rf, defined as follows: (% fines)(% clay sizes in fine fraction) R f = (liquid limit of fine

  • The effect of mixing moisture, oxidative aging and tire pressures on the performance of asphalt mixes

    Creator:
    Kim, Ok-kee
    Abstract:
    The research undertaken consisted of the study of three topics affecting the performance of asphalt concrete mixtures, that is, mixing moisture, oxidative aging and higher tire pressures and axle loads. This thesis presents the findings of the research comprising these three topics. In the first study, the effects of mixing...
    Resource Type:
    Dissertation
    Full Text:
    for separate publication. These articles are derived from two ID? & R (Highway Planning and Research

  • The effect of elevated pressure on the activated sludge process

    Creator:
    Godsil, Patrick James
    Abstract:
    A study of the effect of elevated pressure on the activated sludge waste treatment process is presented. The method of study involved a comparison of two laboratory, batch type, activated sludge units. One unit was operated at atmospheric pressure as a base control and the other operated at elevated pressures...
    Resource Type:
    Masters Thesis
    Full Text:
    Control Unit Porous Diffuser Stone Stainless Steel Drain Test Unit Figure 4. Experimental

  • The effect of elevated pressure and high shear on oxygen uptake rates in activated sludge

    Creator:
    Streebin, Leale E.
    Abstract:
    The purification capacity of an activated sludge process is highly dependent of the rate of oxygen transfer from the air to the microorganisms. This rate can be increased in an air diffusion system by subjecting the culture to high shear and high pressure. A study of the effects of high...
    Resource Type:
    Masters Thesis
    Full Text:
    Engineering ,'t ' Date thesis is presented (' )',-, ,^,.. .. ._. ,,' ,r (. ,'.1r?'//7- Typed by Lucinda