| 要旨 |
An analytical model based on nonlinear 3-D finite element method is introduced in this paper to consider the active and passive confinement provided by prestressed aramid fiber belts. The model is also applied to concrete columns wrapped with FRP sheets, and is verified by experimental results reported for axially loaded concrete columns retrofitted by AFRP sheets. The model is able to account for the influence of different corner radii of square sections on stress-strain curve. Finally, through a parametric study, it is shown that providing active confinement can save the consumption of new materials, while the stress-strain curves are similar to those for only passive confinement provided by AFRC sheets but with thicker plies.
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