Axial Load-Bending Moment Diagrams of Carbon FRP Wrapped Hollow Core Reinforced Concrete Columns
Publication: Journal of Composites for Construction
Volume 13, Issue 4
Abstract
Hollow core reinforced concrete columns are generally preferred in use to decrease the cost and weight/stiffnesss ratio of members, such as bridge columns and piles. With a simplified stress state assumption, strengthening a hollow core reinforced concrete column with fiber-reinforced polymer (FRP) wrapping provides a biaxial confinement to the concrete, which leads to a need of defining the effect of FRP wrapping on the strength and ductility of the hollow core reinforced concrete columns. In this study, two groups of four hollow core reinforced concrete columns ( outer diameter, hollow core diameter, and height) were tested under concentric, eccentric (25 and eccentricity) and bending loads to observe the effect of carbon FRP (CFRP) wrapping. All the columns had internal steel reinforcement. Half of the columns had three layers of circumferential CFRP wrapping, whereas the other half had no external confinement. Axial load-bending moment diagrams of each group were drawn using the obtained experimental results for both groups. It was observed that, CFRP wrapped columns had higher load and moment carrying capacities than the other group. An analytical model is proposed for drawing the diagram of CFRP wrapped hollow core reinforced concrete columns.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 13 • Issue 4 • August 2009
Pages: 262 - 268
Copyright
© 2009 ASCE.
History
Received: May 13, 2008
Accepted: Dec 22, 2008
Published online: Mar 6, 2009
Published in print: Aug 2009
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