Flexural Behavior of Concrete-Filled Fiber-Reinforced Polymer Circular Tubes
Publication: Journal of Composites for Construction
Volume 6, Issue 2
Abstract
This paper presents the experimental results of large-scale concrete-filled glass fiber reinforced polymer (GFRP) circular tubes and control hollow GFRP and steel tubes tested in bending. The diameter of the beams ranged from 89 to 942 mm and the spans ranged from 1.07 to 10.4 m. The study investigated the effects of concrete filling, cross-sectional configurations including tubes with a central hole, tube-in-tube with concrete filling in between, and different laminate structures of the GFRP tubes. The study demonstrated the benefits of concrete filling, and showed that a higher strength-to-weight ratio can be achieved by providing a central hole. The results indicated that the flexural behavior is highly dependent on the stiffness and diameter-to-thickness ratio of the tube, and, to a much less extent, on the concrete strength. Test results suggest that the contribution of concrete confinement to the flexural strength is insignificant; however, the ductility of the member is improved. A strain compatibility model has been developed, verified by the experimental results, and used to provide a parametric study of the different parameters, significantly affecting the behavior. The parametric study covered a wide range of FRP sections filled with concrete, including under-reinforced, balanced, and over-reinforced sections.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 6 • Issue 2 • May 2002
Pages: 123 - 132
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Mar 15, 2001
Accepted: Jul 13, 2001
Published online: Apr 15, 2002
Published in print: May 2002
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