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Item Information   Holdings       More by this author     Zimdahl, Jamie L.     Subjects     Reinforced concrete construction -- Testing     Strains and stresses     Anchorage (Structural engineering)     Reinforcing bars     MSST Project.     Browse Catalog     by author:      Zimdahl, Jamie L.       by title:      The behavior of head...         MARC Display

The behavior of headed reinforcement in concrete members with an applied tensile load / Jamie L. Zimdahl. by Zimdahl, Jamie L. Subjects Reinforced concrete construction -- Testing   Strains and stresses   Anchorage (Structural engineering)   Reinforcing bars   MSST Project. Description:  67 leaves : ill. ; 29 cm. Contents:  Thesis advisor: Dr. Richard DeVries. Committee members: Dr. Hans-Peter Huttlemaier, Dr. John Zachar. Introduction -- Background -- Literature review -- Methods -- Data reduction -- Results -- Discussion -- Conclusion. As the exploration for additional uses of headed deformed bars continues, it becomes more necessary to determine the behavior of reinforcement. Currently, little information is available on a method to predict the behavior or capacity of headed reinforcement. This project will focus on determining if it is possible to analyze the individual behavior of a straight bar and a bar head, and then combine them to find the relationship of a headed bar with bonded length. Twelve beam-end specimens, consisting of a pair of matching specimens for each of the six different variable combinations, were tested to find the effects of bonded length and clear cover. Headed bars with 0" bonded length were tested, and the results were superimposed onto the results of straight bars of certain bonded lengths. The results of the superposition were compared to the test results of headed bars with matching bonded lengths. Test results showed that a percentage of the stiffness of the headed bar with 0" bonded length is combined with a percentage of the stiffness for a straight bar of a certain bonded length to make up the stiffness of a headed bar with bonded length. After testing a variety of percentage combinations, the combination that accurately models the behavior of headed reinforcement could not be identified for certain. It was determined that the assumption that linear superposition of the stiffness of a headed bar of 0" bonded length and a straight bar with bonded length is not accurate. A more accurate behavior could be found by documenting and graphing the independent behavior of the head and the bond length at each stage of loading. With the completion of further testing focused on the effects of clear cover and bonded length, the behavior of headed reinforcement could better be understood.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .Z54 2009 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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