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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Failure of Over-Reinforced Hybrid Fiber Reinforced Polymer Concrete Beam Columns
Author(s): A. Mirmiran, M. Shahawy, and C. El Khoury
Publication: Special Publication
Appears on pages(s): 125-134
Keywords: columns; core; ductility; durability; fiber reinforced polymer; high-strength concretes; tubes
Abstract:Concrete-filled fiber reinforced polymer (FRP) tubes provide an alternative to conventional reinforced and prestressed concrete columns. The tube helps turn normal strength concrete core into a high performance concrete, i.e., one with high strength, ductility, and durability. The over-reinforcement in concrete-filled tubes helps avoid split rupture of the FRP reinforcement in tension, which is catastrophic in nature. A total of 8 concrete-filled FRP tubes were tested as beam-columns under a combination of axial and flexural loads. The tubes were 9 feet long, and had an outside diameter of 13 11/16 in. with a wall thickness of about 0.55 in.. The study showed that over-reinforced concrete-filled FRP tubes generally behave well as beam columns. They deflect to a lesser extent than the corresponding under-reinforced sections. They are also more efficient than under-reinforced sections, because a smaller portion of their sectional capacity is consumed by secondary moments and P-D effects. Their failure, while in compression, is considered to be gradual and progressive.
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