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Filtering by: Creator Hagen, Christopher L. Remove constraint Creator: Hagen, Christopher L. Advisor Higgins, Christopher C. Remove constraint Advisor: Higgins, Christopher C.

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  • Applying climate change information to hydraulic and hydrologic transportation infrastructure

    Creator:
    Al Naabi, Rawan Y.
    Abstract:
    Scour is the main cause of bridge failures in the United States. Bridge failures raise a hazard to the safety of the traveling public as well as the massive economic consequences due to the high cost of constructing a new or a replacement bridge. The Oregon Department of Transportation (ODOT)...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Christopher C. Higgins Scour is the main cause of bridge failures in the United States

  • 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:
    . Abstract approved: ______________________________________________________ Christopher C. Higgins

  • Experimental and Analytical Studies of Large-Scale Pile Caps

    Creator:
    Al-Sakin, Yasmeen
    Abstract:
    Pile caps are structural elements used to transfer loads from columns to a group of piles, which transfer them to stronger soil layers. Pile cap with horizontal distance between the column and piles less than twice its effective depth is categorized as "deep," where significant nonlinear strain distribution occurs through...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Christopher C. Higgins Pile caps are structural elements used to transfer loads from

  • Wind induced torsional fatigue behavior of truss bridge verticals

    Creator:
    Keller, Philipp
    Abstract:
    The Astoria-Megler Bridge is a 6.6 kilometer (4.1 mile) long bridge, connecting Oregon and Washington on US 101, with a continuous steel truss main span of 376 m (1232 ft). It is the second longest main span bridge of this type in the world. Due to vortex shedding, some of...
    Resource Type:
    Masters Thesis
    Full Text:
    Christopher C. Higgins The Astoria-Megler Bridge is a 6.6 kilometer (4.1 mile) long bridge, connecting

  • Application of Titanium Alloys Bars for Restoration of Historical Structures Considering Alternative Grout Materials

    Creator:
    Alshimaysawee, Aiyad K.
    Abstract:
    In the first quarter of the twentieth century, iron was commonly used to provide tensile resistance for preservation and restoration of historical buildings. A major factor contributing to increasing the deterioration and degradation of historic structures is corrosion of ferrous materials. One approach to avoid long-term degradation of iron and...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________ Christopher C. Higgins In the first quarter of the twentieth century, iron was commonly

  • Influence of diagonal cracks on negative moment flexural anchorage performance in reinforced concrete bridge girders

    Creator:
    Goodall, Joshua K.
    Abstract:
    Large numbers of vintage reinforced concrete deck-girder bridges remain in the national bridge inventory. Many of these exhibit diagonal cracking and other distress. Due to the design practices of the time, it is common to observe cracks at locations where flexural reinforcing steel is terminated along the span. The presence...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________________________ Christopher C. Higgins Large numbers of vintage reinforced concrete deck-girder bridges

  • 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

  • Experimental research on the behavior and strength of large-scale steel gusset plates with sway-buckling response including effects of corrosion and retrofit options

    Creator:
    Hafner, Anthony G.
    Abstract:
    The collapse of the I-35W Bridge in Minneapolis, MN on August 1, 2007 brought into question the design and inspection of gusset plates in steel truss bridges. The experimental tests performed in this research study the sway-buckling strength and behavior of large-scale steel gusset plates in an isolated truss connection....
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: Christopher C. Higgins The collapse of the I-35W Bridge in Minneapolis, MN

  • Laboratory performance of highway bridge girder anchorages under hurricane induced wave loading

    Creator:
    Lehrman, Jora
    Abstract:
    Many bridges along the Gulf Coast of the United States were damaged by recent hurricanes, and many more are susceptible to similar damage. This research examines performance of common anchorage connection details for AASHTO Type III prestressed concrete girders used by some transportation agencies. Full-scale specimens were fabricated and tested...
    Resource Type:
    Masters Thesis
    Full Text:
    Christopher C. Higgins Many bridges along the Gulf Coast of the United States were damaged by recent

  • Behavior of open grid steel bridge decks under service and fatigue loads

    Creator:
    Fetzer, Peter C.
    Abstract:
    Open grid steel bridge decks have been in use for nearly a century. These open grid decks provide an economical and lightweight alternative to traditional reinforced concrete decks. As the transportation infrastructure continues to deteriorate, open grid decks can be used as a cost effective way to rehabilitate structurally deficient...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Christopher C. Higgins Open grid steel bridge decks have been in use for nearly a century