Advanced grid stiffened FRP tube encased concrete cylinders

Document Type

Conference Proceeding

Publication Date

1-1-2020

Abstract

In this study, an advanced grid stiffened (AGS) composite tube, which was made of a lattice of interlaced fiber reinforced polymer (FRP) ribs that was wrapped by a FRP skin, was used to encase concrete cylinders. Two types of cylinders were prepared. One was a circular cylinder and the other was a square cylinder. For the circular cylinders, a uniaxial compression test was conducted; for the square cylinders, both uniaxial compression test and four-point bending test were conducted. The test results showed that the AGS tube confined concrete cylinders displayed a considerable positive composite action due to the mechanical interlocking. The AGS tube provided an “active” confinement to the concrete core. The elastic range and the specific axial strength of the circular AGS cylinders, and the specific bending strength of the square AGS beams were higher than those encased by solid FRP tubes, solid steel tubes, or steel grid tubes. The square AGS tubes were not as effective as the circular AGS tubes in confining concrete.

Publication Source (Journal or Book title)

Composites in Civil Engineering, CICE 2006

First Page

449

Last Page

452

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