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Mechanical behavior of fiber-reinforced polymer-wrapped concrete columns - complicating effects
Performance of circular concrete columns subjected to axial compressive loads improves dramatically with fiber-reinforced polymer composite (FRP) wraps on them. In this paper, the effect of cross-sectional shapes and geometric and loading imperfections on the behavior of FRP-confined columns has been investigated. The major conclusions are: The FRP confinement is most effective for columns of a circular cross section. For noncircular cross sections, although the stiffness of the columns remains close to that of circular ones, the ultimate strain of the column decreases. As a result, the ultimate strength also decreases. The failure of concentrically loaded noncircular columns takes place at the corners. The maintenance of a minimum corner radius is of great importance for noncircular columns. It has been found that, at a 15 mm corner radius, the hoop stress concentration in FRP is negligible. A modification of the confinement factor has been proposed to model noncircular columns. The factor determines the diameter of an equivalent circular column. It is found that the ultimate load reduces in the same proportion as the ratio of the eccentricity and the radius of gyration.
Mechanical behavior of fiber-reinforced polymer-wrapped concrete columns - complicating effects
Performance of circular concrete columns subjected to axial compressive loads improves dramatically with fiber-reinforced polymer composite (FRP) wraps on them. In this paper, the effect of cross-sectional shapes and geometric and loading imperfections on the behavior of FRP-confined columns has been investigated. The major conclusions are: The FRP confinement is most effective for columns of a circular cross section. For noncircular cross sections, although the stiffness of the columns remains close to that of circular ones, the ultimate strain of the column decreases. As a result, the ultimate strength also decreases. The failure of concentrically loaded noncircular columns takes place at the corners. The maintenance of a minimum corner radius is of great importance for noncircular columns. It has been found that, at a 15 mm corner radius, the hoop stress concentration in FRP is negligible. A modification of the confinement factor has been proposed to model noncircular columns. The factor determines the diameter of an equivalent circular column. It is found that the ultimate load reduces in the same proportion as the ratio of the eccentricity and the radius of gyration.
Mechanical behavior of fiber-reinforced polymer-wrapped concrete columns - complicating effects
Das mechanische Verhalten von mit faserverstärktem Kunststoff ummantelten Betonsäulen - Komplikationen
Mukherjee, A. (author) / Boothby, T.E. (author) / Bakis, C.E. (author) / Joshi, M.V. (author) / Maitra, S.R. (author)
Journal of Composites for Construction ; 8 ; 97-103
2004
7 Seiten, 7 Bilder, 7 Tabellen, 8 Quellen
Article (Journal)
English
Mechanical Behavior of Fiber-Reinforced Polymer-Wrapped Concrete Columns-Complicating Effects
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