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Showing 1 to 8 of 8 for “"prestressing strand"”.
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Grade 300 Prestressing Strand and the Effect of Vertical Casting Position
… was to investigate the influence an increase in strand strength and the effect the as-cast vertical location had on transfer length, development length, and flexural strength and to resolve the discrepancies regarding the definition of the top-bar/strand effect. Two types of test specimens were …
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Evaluation of Hybrid-Composite Beam for Use in Tide Mill Bridge
… The beam consists of a concrete arch tied with prestressing strand that is placed within a Fiber-Reinforced Polymer (FRP) box. Behavior in individual HCB's and a three HCB-system was examined to determine the appropriateness of the current design methodology developed by John Hillman and the …
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Bond and Material Properties of Grade 270 and Grade 300 Prestressing Strands
… material properties of grade 270 and grade 300 prestressing strand of various sizes. Tension tests were performed on each type of strand. The data from these tests was used to determine modulus of elasticity, yield stress, ultimate stress, and ultimate elongation for each strand. The yield …
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Development of Improved Connection Details for Voided Slab Bridges
… joint, where it corrodes the reinforcement and prestressing strand. Ultimately, the failed keys lead to costly repairs and bridge replacements sooner than their proposed lifespan. This research project aimed to develop a more durable longitudinal connection detail by using sub-assemblages to …
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Top Strand Effect and Evaluation of Effective Prestress in Prestressed Concrete Beams
… prestressed concrete members. The "top strand effect" was evaluated through transfer and development length tests of prestressed concrete beams. Eight beams were cast with normal orientation, while four beams were cast with inverted orientation so that a significant depth of fresh …
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Computational Simulation of Chloride-Induced Corrosion Damage in Prestressed Concrete Bridge Girders
… girder span values, cross-sectional shapes, and prestressing strand layouts has been used in bridges across the United States. A major concern for such bridges is the possibility of corrosion damage in the prestressing strands or reinforcing bars, which is commonly caused by the use of deicing …
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Material Properties of the Grade 300 and Grade 270 Prestressing Strands and their Impact on the Design of Bridges
… properties of the new Grade 300, low-relaxation prestressing strand. The purpose of this testing was to verify the advertised breaking strengths and relaxation properties of the Grade 300 strand. Additional properties, such as yield strength, modulus of elasticity, and elongation, were also …
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Implementation of Self-Consolidating Concrete for Bridge Applications
… measurement of the residual strain based on strand strain readings, which were taken directly from the strand strain gage readings. The test beam exhibited higher deflection and lower capacity at cracking than the theoretical behavior using PCI design values. Adjustments of the material …