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  • Vulnerability of port and harbor communities to earthquake and tsunami hazards in the Pacific Northwest

    Creator:
    Wood, Nathan J.
    Abstract:
    Earthquakes a . tsunamis pose significant threats to port and harbor communities in the Pacific Northwest. Developing effective mitigation and preparedness plans requires a comprehensive understanding of community vulnerability. Research presented here focuses on the vulnerability of ports and harbors to earthquake and tsunami hazards and includes a regional study...
    Resource Type:
    Dissertation

  • 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:
    highly susceptible to earthquake- induced damages. These damages are primarily due to soil liquefaction

  • The seismic geotechnical modeling, performance, and analysis of pile-supported wharves

    Creator:
    McCullough, Nason J.
    Abstract:
    This dissertation presents the results of a research effort conducted to better understand the seismic performance and analysis of pile-supported wharves. Given the limited number of well-documented field case histories, the seismic performance of pile-supported wharves has been poorly quantified, and the analysis methods commonly employed in engineering practice have...
    Resource Type:
    Dissertation
    Full Text:
    Modeling of the Earthquake Motions ................................................... 35 CHAPTER 2

  • Sublethal effects of estuarine carbaryl applications on juvenile English sole (Pleuronectes vetulus)

    Creator:
    Pozarycki, Scott V.
    Abstract:
    The pesticide carbaryl is applied annually to tidelands in Willapa Bay and Grays Harbor, WA to control populations of burrowing shrimp which modify sediments making the habitat unsuitable for oyster culture. Fish trapped on sprayed mudflats are often killed, but little is known about effects on fish present in subtidal...
    Resource Type:
    Dissertation
    Full Text:
    J. Weber The pesticide carbaryl is applied annually to tidelands in Willapa Bay and Grays Harbor

  • Soil-bridge interaction during long-duration earthquake motions

    Creator:
    Romney, Kyle T.
    Abstract:
    Earthquake engineering analyses are often performed using shallow, crustal earthquake motions (e.g., 1940 El Centro). However, large areas of the world are subject to subduction zone earthquake motions (e.g., the Pacific Northwest). A subduction zone earthquake motion is characterized by its long duration (e.g., strong shaking lasts for more than...
    Resource Type:
    Masters Thesis
    Full Text:
    , California shallow, crustal earthquake (ACE-MRL, 2013). . . . . . . . . . . . . . . . . . 2 2.1 Effect of

  • Seismic protection of flexible rotating machines using base isolators

    Creator:
    Su, Wen-Chyi
    Abstract:
    Base isolation is an alternative seismic design strategy in which the primary structures and their internal components are uncoupled from the potentially damaging horizontal components of an earthquake by base isolators which attenuate the transmission of horizontal acceleration into the system. Rotating machines are among the key internal components of...
    Resource Type:
    Dissertation
    Full Text:
    effect of earthquake excitations on rotor bearings. Lately, some more realistic flexible models

  • Seismic Performance of Square Reinforced Concrete Columns Retrofitted with Titanium Alloy Bars

    Creator:
    Lostra, Mackenzie M. W.
    Abstract:
    Large numbers of reinforced concrete (RC) bridges were built in the past that are now considered seismically deficient. The structural members most likely to be considered deficient are the supporting columns. Typical deficient columns contain inadequate transverse reinforcement and poorly detailed lap splice lengths above the foundation. Insufficient lap splice...
    Resource Type:
    Masters Thesis
    Full Text:
    .................................................................................... 78 Figure 4-16: Deformed column geometry for calculating P-Δ effect

  • Seismic performance of reinforced concrete bridge columns constructed with grade 80 reinforcement

    Creator:
    Link, Tim B.
    Abstract:
    The research presented in this thesis assessed the use of high strength steel (HSS) reinforcement for use in reinforced concrete (RC) bridge columns. HSS is not currently allowed in reinforced concrete bridge columns due to a lack of information on the material characteristics and performance information when used in RC...
    Resource Type:
    Masters Thesis
    Full Text:
    grade of reinforcement, effect of the longitudinal reinforcement ratio, and the effect of the moment

  • Seismic performance of diagrid steel structures using single and double friction mass dampers

    Creator:
    Ramadhan, Garlan
    Abstract:
    The steel diagrid structural system is a recent load bearing and lateral resisting structural system for tall building structures that is relatively unexplored in the western United States. One possible reason for the little use of diagrid systems in earthquake prone regions is the lack of guidelines and application examples...
    Resource Type:
    Masters Thesis
    Full Text:
    United States. One possible reason for the little use of diagrid systems in earthquake prone regions is

  • Seismic Performance of Aging Prestressed Transmission Pole with Simulated Soil Foundation

    Creator:
    Argo, Maximo
    Abstract:
    The Cascadia Subduction Zone has recently been identified as a source for an impending great earthquake. The potential of a large earthquake has created widespread interest into the resiliency of lifelines within the potentially affected areas. One critical lifeline is the electrical distribution and transmission systems which relies on legacy...
    Resource Type:
    Masters Thesis
    Full Text:
    earthquake. The potential of a large earthquake has created widespread interest into the resiliency of