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Filtering by: Creator Collins, Andrew R. Remove constraint Creator: Collins, Andrew R. Academic Affiliation Civil, Construction, and Environmental Engineering Remove constraint Academic Affiliation: Civil, Construction, and Environmental Engineering Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Quantification of advection and dispersion in lateral subsurface flowpaths at the hillslope-scale

    Creator:
    Victory, Nichole I.
    Abstract:
    It is becoming increasingly important to understand fundamental hillslope-scale hydrological processes. Most hillslope-sale transport experiments have generally focused on conceptual findings or other aspect of flow behavior, rather than the quantification of the mass transport mechanisms of advection and dispersion. When the velocities have been quantified, dispersion has been mentioned...
    Resource Type:
    Masters Thesis
    Full Text:
    1.5 2 2.5 3 Days from beginning of injection [B r- ] t re n ch ( m g B r- / L ) 0 60 120

  • Hybridized framing to modify load paths and enhance wood shearwall performance

    Creator:
    Bultena, Sarah M.
    Abstract:
    Heavy timber framing relies primarily on bracing to withstand lateral loads due to earthquakes and wind events. Bracing configurations in heavy timber framed buildings vary widely and include cross bracing, knee bracing, and other geometries. Many heavy timber frames constructed during colonial American times are still standing, exceeding the expected...
    Resource Type:
    Masters Thesis
    Full Text:
    period of the building, importance factor and the response modification coefficient, R, are used to

  • Performance-based seismic design of light-frame shearwalls

    Creator:
    Kim, Jun Hee
    Abstract:
    Performance-based design has gained interest in recent years among structural designers and researchers. Performance-based design includes selection of appropriate building sites, structural systems and configurations, as well as analytical procedures used in the design process, to confirm that the structure has adequate strength, stiffness and energy dissipation capacity to respond...
    Resource Type:
    Dissertation
    Full Text:
    allowable seismic weights, and various overstrength (R) factors. ©Copyright by Jun Hee Kim December 22

  • Radon-222 as an in situ partitioning tracer for quantifying nonaqueous phase liquid (NAPL) saturations in the subsurface

    Creator:
    Davis, Brian M.
    Abstract:
    This study investigated the use of radon-222 as an in situ partitioning tracer for quantifying nonaqueous phase liquid (NAPL) saturations in the subsurface. Laboratory physical aquifer models (PAMs), field experiments, and numerical simulations were used to investigate radon partitioning in static (no-flow) experiments and in single-well, 'push-pull' tests conducted in...
    Resource Type:
    Dissertation
    Full Text:
    equation and numerical simulations provided estimates of the radon retardation factor (R), which was used

  • Analysis of diagonally cracked conventionally reinforced concrete girders in the service load range

    Creator:
    Robelo, Melissa J.
    Abstract:
    Performance evaluation of conventionally reinforced concrete (CRC) bridge superstructure elements with diagonal cracks is of interest to the bridge engineering community. Standardized methods to predict service-level stress magnitudes in cracked bridge girders under combined bending and shear forces are not available. An analysis procedure was developed to determine the response...
    Resource Type:
    Masters Thesis
    Full Text:
    .................................................................................................. 4 3. Truss analogy model for reinforced concrete members in shear [Collins and Vecchio, 1988

  • Cyclic triaxial testing of low- to moderate-plasticity silts

    Creator:
    Butler-Brown, Jason J.
    Abstract:
    This project report presents a laboratory investigation of the dynamic behavior of saturated alluvial silty soils from sites in Oregon and Washington. The focus of the study was to document the liquefaction susceptibility, post cyclic strength, and volumetric strain behavior of the silt soils based on cyclic, undrained triaxial compression...
    Resource Type:
    Masters Thesis
    Full Text:
    George P. Saunders Douglas R. Schwarm David Scofield Brett Shipton D. Andrew Vessely Mei Mei Wang

  • Analysis of conventionally reinforced concrete deck girder bridges for shear

    Creator:
    Potisuk, Tanarat
    Abstract:
    Large numbers of 1950's vintage conventionally reinforced concrete (CRC) bridges remain in-service in the national bridge inventory. Many of these bridges are lightly reinforced for shear. Evaluation of these bridges to prevent unnecessary and costly repairs requires refined analytical techniques. This dissertation presents finite element (FE) modeling and comparisons of...
    Resource Type:
    Dissertation
    Full Text:
    equal span lengths, 16.76m (55 ft) each, and have a total width of 10.67m (35 fi). r-r-- n R C : L

  • Anaerobic reductive dechlorination of TCE and TCFE in TCE contaminated sediments : enhanced bioremediation and bioaugmentation

    Creator:
    Lee, Jae-Hyuk
    Abstract:
    This research focused on the enhanced reductive dechlorination of trichloroethene (TCE) and its surrogate, trichlorofluoroethene (TCFE), using two bioremediation methods in anaerobic conditions. Two anaerobic bioremediation studies were conducted to investigate the effects of microbial communities in the presence of different electron acceptors and donors during anaerobic reductive dechlorination of...
    Resource Type:
    Dissertation
    Full Text:
    .; Kloetstra, G.; Keijmel, M.; Wiersum, L. P.; Hutson, R.; Collins, M. D.; Gottschal, J. C. Influence

  • Establishing a through-boring pattern and method of test for utility poles

    Creator:
    Elkins, Lori A.
    Abstract:
    The goal of this study was to optimize a through-boring pattern that will provide adequate preservative penetration while minimizing the reduction in overall pole bending strength. Hole spacing was developed using longitudinal and transverse chemical penetration data from previous studies. Finite element analysis was used as a preliminary assessment tool...
    Resource Type:
    Masters Thesis

  • Scale effects on reinforced concrete beams strengthened for shear with discrete externally bonded carbon fiber-reinforced polymer U-wraps

    Creator:
    Dawson, Matthew Ryan
    Abstract:
    Current ACI design provisions for shear in reinforced concrete (RC) beams strengthened with externally bonded carbon fiber-reinforced polymer (CFRP) U-wraps may not adequately account for the effect of scale. This paper describes tests of 6 geometrically scaled beams to identify possible scale effects of such beams. Results indicated that effective...
    Resource Type:
    Masters Thesis