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Item Information   Holdings       More by this author     Lawson, David     Subjects     Epoxy compounds     Materials -- Creep     Strains and stresses     Structural analysis (Engineering)     Viscoelasticity     MSST Project.     Browse Catalog     by author:      Lawson, David       by title:      Creep characteristic...         MARC Display

Creep characteristics of post-installed epoxy-based anchors subjected to tensile stresses / David Lawson. by Lawson, David Subjects Epoxy compounds   Materials -- Creep   Strains and stresses   Structural analysis (Engineering)   Viscoelasticity   MSST Project. Description:  79 leaves : ill. ; 29 cm. Contents:  Thesis advisor: Dr. John Zachar Committee members: Dr. David Dreifus, Dr. Hans-Peter Huttelmaier Introduction, theories and literature review -- Experiment setup and methodology -- Results and discussion -- Conclusion -- A: Displacement data -- B: Normalized displacement data -- C: Calculated strain data. Industrial strength epoxies have become common use in construction for installing anchor rods into cured concrete. However, connections that rely upon the use of epoxy-based adhesives do not fare as well under tensile stresses as a cast-in-place or mechanical anchor connection. Such materials are prone to creep strains, which can eventually lead to failure in the connection if unchecked. In this report, the creep characteristics of four commonly used adhesives for post-installed anchors were evaluated. The adhesives were used to install 3/8" diameter threaded rods into a concrete beam. The rods were then placed under a constant tensile load using a system of levers. Displacements in the anchors were measured daily over a period of eight weeks. Based on the data acquired and the shear stresses placed on the anchors, it was found that even when loaded within the manufacturer's approved allowable limits, the epoxies within the connections experienced creep. This raises concerns about using epoxy-based adhesives to design connections under a continuous tensile load.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .L383 2008 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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