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Behavior of aramid fiber-reinforced polymer reinforced high strength concrete beams under bending
In the case of AFRP(aramid fiber reinforced polymer)-reinforced concrete, both the reinforcing and the reinforced materials are brittle. As a result, achieving a ductile material with AFRP reinforcement offers a much greater challenge than that with ordinary steel reinforcement. The test program reported in this paper has therefore been designed and directed mainly towards addressing the issue of ductility in flexural members when AFRP bars are used in combination with HSC(high strength concrete). It has been found that the load-deflection response of these beams significantly differs from that of a steel-reinforced beam in terms of cracking behavior, postcracking stiffness, magnitudes of deflections and crack widths, and mode of failure. Cracks in AFRP-reinforced beams form in quick succession and, upon formation, penetrate deep into the compression side of the beam straight away. A secondary crack, if any, appears after the crushing of the cover concrete. At any particular load level, the maximum surface crack width and maximum deflections are several times larger than those in an equivalent steel-reinforced beam. The deflection model proposed by Razaqpur at al. (2000) has been found to give good prediction for the maximum service load deflection of AFRP-reinforced beams.
Behavior of aramid fiber-reinforced polymer reinforced high strength concrete beams under bending
In the case of AFRP(aramid fiber reinforced polymer)-reinforced concrete, both the reinforcing and the reinforced materials are brittle. As a result, achieving a ductile material with AFRP reinforcement offers a much greater challenge than that with ordinary steel reinforcement. The test program reported in this paper has therefore been designed and directed mainly towards addressing the issue of ductility in flexural members when AFRP bars are used in combination with HSC(high strength concrete). It has been found that the load-deflection response of these beams significantly differs from that of a steel-reinforced beam in terms of cracking behavior, postcracking stiffness, magnitudes of deflections and crack widths, and mode of failure. Cracks in AFRP-reinforced beams form in quick succession and, upon formation, penetrate deep into the compression side of the beam straight away. A secondary crack, if any, appears after the crushing of the cover concrete. At any particular load level, the maximum surface crack width and maximum deflections are several times larger than those in an equivalent steel-reinforced beam. The deflection model proposed by Razaqpur at al. (2000) has been found to give good prediction for the maximum service load deflection of AFRP-reinforced beams.
Behavior of aramid fiber-reinforced polymer reinforced high strength concrete beams under bending
Verhalten von mit aramidfaserverstärktem Kunststoff verstärkten, hochfesten Betonträgern unter Biegebeanspruchung
Rashid, M.L.A. (author) / Mansur, M.A. (author) / Paramasivam, P. (author)
Journal of Composites for Construction ; 9 ; 117-127
2005
11 Seiten, 7 Bilder, 6 Tabellen, 30 Quellen
Article (Journal)
English
Behavior of Aramid Fiber-Reinforced Polymer Reinforced High Strength Concrete Beams under Bending
| Online Contents | 2005
Behavior of Aramid Fiber-Reinforced Polymer Reinforced High Strength Concrete Beams under Bending
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Flexural behavior of concrete beams reinforced with aramid fiber reinforced polymer (AFRP) bars
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