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Filtering by: Creator Brewster, C. S. Remove constraint Creator: Brewster, C. S. Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

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  • Optimization and control of cable deployment systems

    Creator:
    Mtira, Mohamed
    Abstract:
    An optimization methodology, algorithms, and computer program for cable/lumped-body deployment system are developed for the design and installation of sonar packages in deep ocean ranges. In addition, a methodology and algorithms for the control of the system are proposed. A penalty function is developed in terms of the system parameters...
    Resource Type:
    Masters Thesis
    Full Text:
    Redacted for Privacy Head of Department of Civil Engineering Redacted for Privacy Dean of Graduat S hool

  • Stochastic analysis of the nonlinear response transition behavior of an ocean system

    Creator:
    Yuk, Dongjun
    Abstract:
    The nonlinear response of an ocean system subjected to random excitations can exhibit very complex dynamic behaviors including jump phenomena and coexistence of attractors. In this study, the stochastic system response behavior of a simple (Duffing) oscillator under narrow-band random excitations is first examined in the subharmonic resonance region. A...
    Resource Type:
    Masters Thesis
    Full Text:
    ) 20.01l ,; .~. ' .. " 11l.00 ': .':2·~·,~.'C, ·r~·",,·~"·· .~ .i';~:>::S:~'::'i ';;:. :;1 D.Y".~ I

  • Deterministic and stochastic control of nonlinear oscillations in ocean structural systems

    Creator:
    King, Paul E.
    Abstract:
    Complex oscillations including chaotic motions have been identified in off-shore and submerged mooring systems characterized by nonlinear fluid-structure interactions and restoring forces. In this paper, a means of controlling these nonlinear oscillations is addressed. When applied, the controller is able to drive the system to periodic oscillations of arbitrary periodicity....
    Resource Type:
    Dissertation
    Full Text:
    advisor, Professor Solomon C. S. Yim, for his obvious dedication to the quest for scientific knowledge

  • Post-wildfire Investigation of Civil Infrastructure Following the 2018 Camp Fire

    Creator:
    Schulze, Stefanie S.
    Abstract:
    Wildland-urban interface (WUI) communities, where forested land boundaries or intermixes with infrastructure, are quickly growing in the US. WUI communities have grown substantially from 1990 to 2010, with an increase of 12.7 million houses and 25 million people. Wildfires encroaching on WUI communities can cause damage to both above ground...
    Resource Type:
    Masters Thesis
    Full Text:
    ............................................................................................... 79 4.4. Achieve Charter High School dimensions (a) plan view, (b) N-S section view, and (c) E

  • High-cycle fatigue response of diagonally-cracked conventionally reinforced concrete bridge girders

    Creator:
    Lee, Ae-young S.
    Abstract:
    The behavior of stirrups engaged by diagonal cracks and under service loads is largely unknown. Full-size laboratory specimens were loaded to induce diagonal cracks and subjected to high-cycle fatigue loading to represent a service life of 50 years. Tests indicated little change in the average stirrup stress range and mean...
    Resource Type:
    Masters Thesis

  • Remote Sensing of Nearshore Hydrodynamic and Morphodynamic Processes

    Creator:
    O'Dea, Annika M.
    Abstract:
    The use of remote sensing techniques in coastal science and engineering has rapidly increased in the past few decades. This dissertation outlines new remote sensing tools using two remote sensing technologies (lidar and X-band marine radar) along with two nearshore hydrodynamic and morphodynamic analyses supported or motivated by these remote...
    Resource Type:
    Dissertation
    Full Text:
    of Nearshore Hydrodynamic and Morphodynamic Processes Abstract approved: Merrick C. Haller The use

  • Unobserved Heterogeneity and Spatial Correlation: Statistical and Econometric Analyses of Heavy-Vehicle Hard Braking and Crash Frequency by Crash Type

    Creator:
    Anderson, Jason C.
    Abstract:
    This dissertation provides a comparison of statistical and econometric frameworks, using a previously unused freight data source, to study crash frequency by crash type and heavy-vehicle hard braking in Oregon. Hard braking can serve as a proxy for several factors, one of which is safety. Therefore, with the hard braking...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Jason C. Anderson

  • Abiotic and biological transformation of TBOS and TKEBS, and their role in the biological transformation of TCE and c-DCE

    Creator:
    Vancheeswaran, Sanjay
    Abstract:
    At Site-300, Lawrence Livermore National Laboratory (LLNL), CA, trichloroethene (TCE) is present along with tetraalkoxysilanes such as tetrabutoxysilane (TBOS) and tetrakis(2-ethylbutoxy) silane (TKEBS), as subsurface contaminants. Intrinsic transformation of TCE to cis-dichloroethene (c-DCE) was observed in the groundwater at locations co-contaminated with TBOS or TKEBS. Attenuation of TBOS and TKEBS...
    Resource Type:
    Masters Thesis
    Full Text:
    their role in the biological transformation of TCE and c-DCE AN ABSTRACT OF THE THESIS OF Sanjay

  • On the nearshore impact of wave energy converter arrays

    Creator:
    O'Dea, Annika Magnuson
    Abstract:
    Radiation stresses, defined as the excess flow of momentum due to the presence of waves (Longuet-Higgins, 1964), are the main drivers behind the cross-shore and longshore forcing that results in wave setup, set-down, and longshore currents (e.g. Svendsen, 2006). Longshore currents entrain and transport sediment and therefore play an important...
    Resource Type:
    Masters Thesis
    Full Text:
    located c) 5 km and d) 15 km offshore with an input Hs = 6 m, an input Tp = 12 s, and low directional

  • Testing and evaluation of flexural reinforcing bars terminating in columns

    Creator:
    Koester, Carl C.
    Abstract:
    Capacity of transverse 1950's vintage reinforced concrete deck girder bridge bent caps with large straight bar anchorages were investigated and evaluated. Eleven subassemblage column specimens were examined with different anchorage lengths, bar groupings, amount of transverse steel, and externally applied axial force. Test results showed an increase in anchorage capacity...
    Resource Type:
    Masters Thesis
    Full Text:
    : Christopher C. Higgins Capacity of transverse 1950's vintage reinforced concrete deck girder bridge bent