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Item Information   Holdings       More by this author     Doocy, Steven A.     Subjects     Fiber-reinforced concrete     Concrete beams -- Testing.     Reinforced concrete construction     MSST Project.     Browse Catalog     by author:      Doocy, Steven A.       by title:      Externally wrapped c...         MARC Display

Externally wrapped carbon fiber-reinforced concrete beams : analysis for determining feasible use of external carbon fiber reinforcement in new beam construction / by Steven A. Doocy. by Doocy, Steven A. Subjects Fiber-reinforced concrete   Concrete beams -- Testing.   Reinforced concrete construction   MSST Project. Description:  40 leaves : ill. ; 29 cm. Contents:  Thesis advisor: Dr. John Zachar. Committee members: Dr. Douglas Stahl, Dr. Richard DeVries. Introduction -- Background -- Methods -- Results and discussion -- Conclusions and recommendations -- A: SR load versus deflection data -- B: CFR load versus deflection data -- C: CFSR load versus deflection data -- D: Example calculations of theoretical capacities. Carbon fiber has been used as reinforcement in concrete structures since the mid-1900's. When used as an external reinforcement, carbon fiber has been used in construction; however, a majority of cases include confinement of existing columns and shear or flexural reinforcement to add or to regain capacity in cracked or failing sections. The purpose of the research conducted and presented in this paper is to investigate the use of carbon fiber as reinforcement for new construction, utilizing the workability of the fiber to produce preformed shapes for use as primary reinforcement as well as stay-in-place concrete formwork. The experiment consisted of testing simply supported flexural members with one of three reinforcing schemes: steel control, carbon fiber control, and carbon fiber and steel composite. The members created using these schemes were compared to current American Concrete Institute code design capacities to determine the feasibility of carbon fiber reinforcement for use in new construction. The results showed that externally bonded carbon fiber as formwork were able to support the pressures exerted by the wet concrete. They did not, however, produce the expected theoretical capacities predicted due to a slip that occurred during loading. This caused the concrete to fail and the fiber to buckle. The data did show that the strengths of carbon fiber and steel in combination were additive, and had the fiber reached its full capacity, the design equations would have been confirmed. Future experimentation should include application of strain gages at critical locations to better determine the stress levels in the respective materials and to determine if the carbon fiber could be used to span longer distances as stay-in-place forms under typical construction loading without excessive deflections.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .D63 2012 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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