Strain development and hoop strain efficiency in FRP confined square columns

L. Bisby, T. Stratford, J. Barrington, D. Dickson

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Abstract / Description of output

The performance of FRP-wrapped square/rectangular columns depends on their corner radius, with larger corner radii resulting in superior confinement. However, the specific impacts of corner radius on the development of hoop strains in the FRP wraps are not well known. Most existing models for square FPvP confined columns only indirectly consider the impacts of corner radius by inserting 'shape' factors into empirically calibrated models based on circular FRP confined columns. This approach cannot rationally account for the phenomena resulting from corner effects. This paper presents an investigation into the mechanics of square FRP confined concrete columns. It is shown that accounting for corner radius requires the inclusion of at least two modification factors: (1) a shape factor which accounts for the area of effectively confined concrete as well as the column's side aspect ratio, and (2) a variable strain efficiency factor which accounts for the adverse effects of decreasing corner radius.
Original languageEnglish
Title of host publication10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011
PublisherAmerican Concrete Institute ( ACI )
Pages147-166
Number of pages20
Volume1
ISBN (Print)9781618392039
Publication statusPublished - 1 Jan 2011
Event10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011 - Tampa, Florida, United States
Duration: 2 Apr 20114 Apr 2011

Conference

Conference10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011
Country/TerritoryUnited States
CityTampa, Florida
Period2/04/114/04/11

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