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  • Analysis of conventionally reinforced concrete bridge girders for low-cycle fatique in shear

    Creator:
    Forrest, Richard W. B.
    Abstract:
    Increasing load magnitudes and loss of reinforcing steel cross-sectional area from corrosion creates the potential for low-cycle fatigue (LCF) in conventionally reinforced concrete (CRC) bridge girders lightly reinforced for shear. LCF of reinforcing steel may be of particular concern. Little data are available for LCF of reinforcing steel without stress...
    Resource Type:
    Masters Thesis

  • Design and fatigue behavior of near-surface mounted CFRP bars for shear strengthening of RC bridge girders

    Creator:
    Johnson, Brandon Ang
    Abstract:
    Carbon fiber reinforced polymer (CFRP) materials are emerging as an effective means of strengthening and rehabilitating bridges. Near surface mounting (NSM) is a newer technique for application of CFRP for retrofitting of bridge members that provides advantages over conventional strengthening techniques. The technique is still new and uncertainties remain regarding...
    Resource Type:
    Masters Thesis
    Full Text:
    : Design and Fatigue Behavior of Near-Surface Mounted CFRP Bars for Shear Strengthening of RC Bridge

  • Distortion-induced fatigue cracking of girder-to-crossbeam connection

    Creator:
    Aljutaili, Dhari S.
    Abstract:
    Oregon Department of Transportation’s bridge no. 9743b is a multi-span, two-girder steel deck bridge connecting the busy interstates 5 and 205. Vertical cracks have been detected in the welded girder-to-crossbeam connections at the bents. Distortion-induced fatigue is suspected to be responsible for the cracking. Linear elastic beam analysis, 2-D and...
    Resource Type:
    Masters Thesis
    Full Text:
    Mechanical Engineering presented on June 15, 2007. Title: Distortion-Induced Fatigue Cracking of Girder

  • Shear repair methods for conventionally reinforced concrete girders and deep beams

    Creator:
    Howell, Daniel A.
    Abstract:
    Many conventionally reinforced concrete deck girder bridges (RCDG) and their intermediate supporting bent caps were designed during the Eisenhower interstate era of the 1950’s with the AASHO design equations at the time, which subsequently place higher demand on the concrete. The referenced components may exhibit diagonal cracking due to the...
    Resource Type:
    Dissertation
    Full Text:
    : _______________________________ Christopher C. Higgins Many conventionally reinforced concrete deck girder bridges (RCDG

  • Design, analysis and evaluation of bridge superstructures for live loads

    Creator:
    Turan, O. Tugrul
    Abstract:
    Due to age, original design that is deficient by modern standards, inadequate maintenance, environmental conditions, and increasing loads, large numbers of bridges in United States and elsewhere are classified as deficient and in need of rehabilitation or replacement. According to a national bridge inventory established by the Federal Highway Administration,...
    Resource Type:
    Dissertation
    Full Text:
    measurements on in-service deck-girder bridges and these were combined with available data in literature to

  • Experimental behavior of wide-flange beams with web holes

    Creator:
    Horning, Richard Alan
    Abstract:
    Two built-up wide-flange beams with several large holes in each beam were tested to failure. Strains were measured by strain gages at various levels, located at the ends and center of typical holes, and deflections were measured optically at two points on each beam. Lateral bracing was provided to prevent...
    Resource Type:
    Masters Thesis
    Full Text:
    subject by testing actual specimens and comparing measured strains and deflections with computed values

  • A transistorized sonic generator and detector for finding Young's modulus of wooden beams

    Creator:
    Jaenicke, Richard Alex
    Abstract:
    Young's modulus, often called the modulus of elasticity, gives a measure of the stiffness of a material to an imposed load. The modulus of a wooden beam is most often obtained by destructive tests which destroy the specimen. If a practical method can be found to measure Young's modulus non-destructively,...
    Resource Type:
    Masters Thesis
    Full Text:
    professor are deeply appreciated. i TABLE OF CONTENTS INTRODUCTION BACKGROUND ON TESTING

  • Experimental studies of Vierendeel beam analysis

    Creator:
    Russell, William Clyde
    Abstract:
    Fabricated steel beam specimens with rectangular holes cut in the webs were subjected to load tests to analyze the behavior of the modified section. Beam-depth to hole-depth ratio was in all cases 2.0; however, ratio of hole length to hole height varied from 2.0 to 3.0. The primary instrumentation of...
    Resource Type:
    Masters Thesis
    Full Text:
    accurate predictions of the behavior of such beams. This thesis project in- volves the testing of beam

  • Creep of small wood beams under constant bending load

    Creator:
    Forest Products Laboratory (U.S.) and Clouser, William Sands, 1921-
    Resource Type:
    Technical Report
    Full Text:
    ). Creep As is well known, the static testing of materials is often not sufficient for the determination

  • An analytical model for fatigue crack propagation

    Creator:
    Anderson, James L.
    Abstract:
    Beginning with the basic equations from the theory of elasticity and employing a model of crack propagation based on the concept of a constant plastic energy absorption per unti of crack extension, the commonly accepted power law of fatigue crack propagation was derived. This derivation uses an extension of the...
    Resource Type:
    Masters Thesis
    Full Text:
    Department) (Date) Title: AN ANALYTICAL MODEL FOR FATIGUE CRACK PROPAGATION Abstract approved: Redacted