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  • Non-destructive determination of yield stress for in-situ gusset plates

    Creator:
    Pflaum, Therese Michelle
    Abstract:
    Failure of a gusset plate that caused the I-35W Bridge collapse in Minneapolis, MN resulted in mandated rating of connections by the Federal Highway Administration (FHWA). Rating connections requires material properties as an input. The material properties are generally reported on the available detailed drawings for bridges. However, some bridges...
    Resource Type:
    Masters Thesis
    Full Text:
    ........................................................................................... 38 3.3 Material Testing

  • In-forest log segregation based on acoustic measurement of wood stiffness

    Creator:
    Amishev, Dzhamal Y.
    Abstract:
    To remain competitive, the forest products industry needs to look for new and innovative processes and technologies to not only reduce costs but also to recover more value through the entire seedling-to-customer forest products supply chain. It is well recognized that measuring wood properties of logs in real time during...
    Resource Type:
    Dissertation
    Full Text:
    Page 1.1 Types of stress waves in semi-infinite elastic material…………………………6 1.2 The four

  • Environmental durability of reinforced concrete deck girders strengthened with surface-bonded carbon fiber-reinforced polymer

    Creator:
    Sopal, Gautam Jayant
    Abstract:
    Long-term durability of surface-bonded carbon fiber-reinforced polymer (CFRP) for shear strengthening of reinforced concrete (RC) bridge members remains uncertain due to the limited field experience with these materials. This paper provides experimental results from the testing of full-scale RC bridge girder specimens after exposure to prolonged environmental exposure and combined...
    Resource Type:
    Masters Thesis
    Full Text:
    with these materials. This paper provides experimental results from the testing of full-scale RC