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Filtering by: Creator Jackson, T. L. Remove constraint Creator: Jackson, T. L. Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering File Format application/pdf Remove constraint File Format: application/pdf

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  • Investigation of the behavior of diagonally cracked full-scale CRC deck-girders injected with epoxy resin and subjected to axial tension

    Creator:
    Smith, Matthew T. (Matthew Todd)
    Abstract:
    Article 1: Behavior of Epoxy Injected Diagonally Cracked Full-Scale CRC Deck-Girders. Many cast-in place reinforced concrete deck-girder bridges (RCDG) remain in the national inventory and exhibit diagonal cracking. Epoxy injection has been in use for several decades as a method for sealing diagonal cracks, but the effects on girder behavior...
    Resource Type:
    Masters Thesis
    Full Text:
    THESIS OF Matthew T. Smith for the degree of Master of Science in Civil Engineering presented on

  • Wood materials and shearwalls of older light-frame residential structures

    Creator:
    Carroll, Cameron T.
    Abstract:
    Light-frame construction practices and materials have changed greatly over the past 100 years. Contemporary research has focused on modern construction; thus, we know a great deal about the behavior of modern lightframe buildings under lateral forces. However, there are many light-frame buildings that were built prior to the introduction of...
    Resource Type:
    Masters Thesis
    Full Text:
    embedment test setup where L = Length (in), T = Thickness (in), and W = Width (in)…………………………….. 186 D.5

  • Changes in hyporheic exchange flow following experimental large wood removal in a second order, low gradient stream, Chichagof Island, AK

    Creator:
    La Nier, Justin
    Abstract:
    Hyporheic Exchange Flow (HEF) is driven by head gradients defined by the hydro-topography of the stream surface, which is controlled by the particular geomorphology of the stream. We quantified the impact of large wood, which typically exerts a strong control on stream morphology, on HEF in a second order, low...
    Resource Type:
    Masters Thesis
    Full Text:
    wood removal. Reach total hyporheic exchange decreased from 0.96 to 0.87 L/s during loss of sediment

  • Strain distribution in OSB and GWB in wood frame shear walls

    Creator:
    Sinha, Arijit
    Abstract:
    The overall goal of this study was to gain an insight into the load sharing aspect between oriented strand board (OSB) and gypsum wall board (GWB) in shear wall assembly during racking load. More specifically the objectives of the study were to: (1) evaluate qualitatively the load sharing between OSB...
    Resource Type:
    Masters Thesis
    Full Text:
    ) ...................................................................................................... 40 A2 MOE values for 2x4 (T series

  • Consistency and effectiveness of advisory speeds: an evaluation of current posting techniques

    Creator:
    Rohani, Joshan W.
    Abstract:
    Crash rates are said to be nearly three times higher on curved sections than those on straight sections of rural roadways. As a result, advisory curve/speed signs are standard practice to mitigate these risks on sharp horizontal curves. The industry standard for determining appropriate and uniform speeds for such signs...
    Resource Type:
    Masters Thesis
    Full Text:
    9 Lane 5 Malheur 6 Grant Region 3: 1 Jackson 7 Union 2 Coos 8 Harney 3 Curry

  • Optimal mixture of road network ownership

    Creator:
    Li, Mingxin
    Abstract:
    The present highway funding system, especially fuel taxes, may become less reliable revenue sources in the future, while the transportation public agencies do not have the sufficient financial resources needed to meet the increasing traffic demand. Regarding the socio-economic impact of road privatization, a wide range of approaches and models...
    Resource Type:
    Masters Thesis
    Full Text:
    A n n u a l H o u r s o f D e l a y p e r T r a v e l e r Very Large Average Large

  • 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

  • Normal acceleration characteristics of the leading vehicle in a queue at signalized intersections on arterial streets

    Creator:
    Zhu, Hong
    Abstract:
    Normal acceleration characteristics of passenger cars provide valuable information for various aspects of transportation engineering, including use in the geometric designs of intersections, freeway ramps, passing lanes, acceleration lanes, turning bays, or in the development of traffic simulation or fuel consumption models. However, the data used in previous studies are...
    Resource Type:
    Masters Thesis
    Full Text:
    motion under constant acceleration, 21 2 t i i v v at x v t at

  • Reducing sediment production from forest roads during wet-weather use

    Creator:
    Toman, Elizabeth Myers
    Abstract:
    Forest roads produce fine sediment with traffic during wet weather. If the forest road is connected to a stream it can be a source of turbidity and fine sediment that may be detrimental to aquatic organisms especially salmonids. The goal of this work was to investigate turbid runoff during wet-weather...
    Resource Type:
    Dissertation
    Full Text:
    ." Oregon Department of Forestry, Salem, Oregon. Reid, L. M., and Dunne, T. (1984). "Sediment production

  • 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

  • Metabolic uncoupling of Shewanella oneidensis MR-1, under the presence of excess substrate and 3,3’,4’,5 tetrachlorosalicylanilide

    Creator:
    Saini, Gaurav
    Abstract:
    Dissociation between catabolism and anabolism, generically termed “metabolic uncoupling”, has been studied for aerobic cultures of Shewanella oneidensis MR-1. Under conditions promoting metabolic uncoupling, the cell yield diminishes while the substrate utilization rate remains largely unchanged. The effects of excess substrate conditions and TCS addition on the metabolism of pyruvate...
    Resource Type:
    Masters Thesis
    Full Text:
    (mM pyr-ml/cells) O b se rv ed y ie ld ( ce ll s/ m l/ m M p y r) Figure 1. Effect of

  • 3-D finite element modeling in OpenSees for bridge live-load girder distribution factors

    Creator:
    Scoggins, Luke A.
    Abstract:
    A generalized, three-dimensional, finite element bridge model was created in order to efficiently and accurately assess live-load girder distribution factors for a variety of bridge types. This model shortens the time required by bridge analysts to develop individual finite element models for bridges of varying geometries. The creation of the...
    Resource Type:
    Masters Thesis
    Full Text:
    Element Length (1/mm) log. scalelog. scalelog. scalelog. scale R e la ti v e T im e - l in . s

  • Uranium and technetium bio-immobilization in intermediate-scale physical models of an in situ bio-barrier

    Creator:
    Michalsen, Mandy M.
    Abstract:
    Metal and hydrogen ion acidity and extreme nitrate concentrations typical of Department of Energy (DOE) legacy waste sites pose formidable challenges to successful implementation of in situ bio-immobilization. Intermediate-scale (~ 2.5 m), flow through models of an in situ bio-barrier were constructed to investigate U and Tc removal from groundwater...
    Resource Type:
    Dissertation
    Full Text:
    . 2 3 T pH 5 6 7 8 9 Lo g 1 0 of C on ce nt ra tio n -7.0 -6.5 -6.0 -5.5 -5.0 -4.5

  • Tidal influence on downstream fining in gravel-bed rivers

    Creator:
    Coles, Derron Rafiq
    Abstract:
    This research examines the downstream fining phenomenon as it operates in coastal gravel-bed rivers of Oregon. Downstream fining is a change in bed composition toward smaller sediment sizes in the downstream direction. Changes in stream flow discharge and channel slope affect the rate of bed-load transport, thereby altering the downstream...
    Resource Type:
    Dissertation
    Full Text:
    particle diameter at distance L, Do is the initial diameter at 0=L and k is a diminution coefficient

  • 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:
    wood buildings. Kasal et al. (2004) modeled L-shaped light-frame structures to explore the effect of

  • Sustainable construction safety and health rating system

    Creator:
    Rajendran, Sathyanarayanan
    Abstract:
    The main objective of this research study is to incorporate construction worker safety and health into sustainable design and construction practices. This can be fulfilled by the development of an innovative construction worker safety and health planning tool, called Sustainable Construction Safety and Health (SCSH) Rating System that will: •...
    Resource Type:
    Dissertation