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Filtering by: Creator Johnson, Colin P. Remove constraint Creator: Johnson, Colin P. Academic Affiliation School of Civil and Construction Engineering Remove constraint Academic Affiliation: School of Civil and Construction Engineering Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Light-frame versus timber frame : a study in quantifying the differences

    Creator:
    Malone, Brian P.
    Abstract:
    The objective of this study was to compare light wood framing and traditional timber framing quantitatively through environmental impact assessment and load path analysis. This research was inspired by a traditional timber frame structure constructed in Vermont in 2011, and the design of structures considered within reflect the general characteristics...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Brian P. Malone for the degree of Master of Science in Wood Science

  • Investigation of Drilled Shafts under Axial, Lateral, and Torsional Loading

    Creator:
    Li, Qiang
    Abstract:
    Drilled shaft foundations provide significant geotechnical resistance for support of structures, such as highway bridges, traffic sign, and signal pole structures, and are used widely to meet their structural foundation requirements. The amount of steel reinforcement in drilled shaft foundations has increased over the past several decades to account for...
    Resource Type:
    Dissertation
    Date Created:
    Full Text:
    . Based on the empirical soil reaction- displacement (p-y) curves, a region-specific p-y curve model was

  • Coastal Soil and Structure Behavior during Earthquake-Tsunami Multi-Hazards

    Creator:
    Qiu, Yingqing
    Abstract:
    Coastal multi-hazards, i.e., earthquakes followed by tsunamis, induce severe damage to coastal infrastructure. The multi-hazards can cause soil liquefaction, which is one of the major concerns for evaluating sediments transport potential and structure failure mechanisms. The objectives for this work is threefold. First, to build and validate a soil numerical...
    Resource Type:
    Dissertation
    Full Text:
    conductivity is the most sensi- tive and uncertain parameter in the u − p form of Biot’s equation — a well

  • Flexural steel anchorage performance at diagonal crack locations

    Creator:
    Triska, Mary Ann
    Abstract:
    Large numbers of reinforced concrete deck girder bridges that were constructed during the interstate system expansion of the 1950s have developed diagonal cracking in the stems. Compared to the present AASHTO-LRFD standards, the provisions of the 1950s allowed for higher shear stress in the concrete, thus reducing the amount of...
    Resource Type:
    Masters Thesis
    Full Text:
    , Duncan Stark, Eric Goodall, Brandon Johnson, and Jake Goebel. I am very thankful to my husband

  • Practical modeling for load paths in a realistic, light-frame wood house

    Creator:
    Pfretzschner, Kathryn S.
    Abstract:
    The objective of this study was to develop and validate practical modeling methods for investigating load paths and system behavior in a realistic, light-frame wood structure. The modeling methods were validated against full-scale tests on subassemblies and an L-shaped house. The model of the L-shaped house was then modified and...
    Resource Type:
    Masters Thesis
    Full Text:
    When Truss 9 is Loaded ...93 Figure E-1: Testing Apparatus and Sensor Locations (Dolan and Johnson

  • Modeling shallow-water hydrodynamics : rotations, rips, and rivers

    Creator:
    Long, Joseph W.
    Abstract:
    Hydrodynamic models are used as a diagnostic tool to understand the temporal variability of shallow-water processes that are difficult to completely resolve with traditional field measurements. For all simulations, modeled quantities are qualitatively or quantitatively compared with available measurements to gain confidence in conclusions derived from the modeled results. In...
    Resource Type:
    Dissertation
    Full Text:
    currents (a.k.a transient rips; Johnson and Pattiaratchi (2004)) whose effects on the overall current

  • Examination of lateral stiffness and strength of pitched residential roof diaphragms with implications for seismic design.

    Creator:
    Kirkham, William J.
    Abstract:
    There are about 80 million single-family dwellings (SFD) in the United States, predominantly of wood-frame construction. Of these, 68% are owner occupied. A home is typically the largest single investment of a family, and is often not covered by earthquake insurance, even where it is available. Of all SFD in...
    Resource Type:
    Dissertation
    Full Text:
    or roof diaphragms, however, there is very limited research on pitched roof diaphragms (Johnson and

  • In-Plane Shear Performance of Cross-laminated Timber and Cross-laminated Timber Concrete Composite Diaphragm Connection Systems

    Creator:
    Taylor, Brad
    Abstract:
    Cross-laminated timber (CLT) panels have been gaining popularity as diaphragm elements in mid- to high-rise construction projects. In addition, CLT-concrete composite (CCC) diaphragms have been implemented to expand the use of CLT diaphragms. To understand the behavior of CLT and CCC diaphragms, this research effort sought to characterize the cyclic,...
    Resource Type:
    Masters Thesis
    Full Text:
    CLT panels, originally fabricated by DR Johnson Lumber Company as 1.52 m by 6.10 m (5 ft. x 20 ft

  • Reassessment of Grading Criteria with Respect to the Flexural Properties of Douglas-fir Crossarms

    Creator:
    Anderson, Christopher H.
    Abstract:
    Wood plays a key role in modern electrical infrastructure; crossarms and power poles utilize the high strength to weight ratio, availability and low cost of wood to facilitate the access of power to millions of Americans. However, wood presents a variety of challenges as a material. In structural applications, one...
    Resource Type:
    Masters Thesis
    Full Text:
    with load P and its components. ................................................................. 26

  • Moisture effects on properties of wood-composite assemblies

    Creator:
    King, David
    Abstract:
    Engineered wood composites are used in many structural applications and are intended for dry use. However, these materials may encounter significant amounts of wetting while in service, which can lead to structural failures. This study combined aspects of wood science, mechanics, structural engineering, and mycology to assess changes in material...
    Resource Type:
    Masters Thesis
    Full Text:
    stiffness (McCutcheon 1985, Johnson 1997, Durham et al. 2001, van de Lindt 2004, Sinha and Gupta 2009