Confinement Effectiveness in Rectangular Concrete Columns with Fiber Reinforced Polymer Wraps
- 1 October 2005
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Composites for Construction
- Vol. 9 (5), 388-396
- https://doi.org/10.1061/(asce)1090-0268(2005)9:5(388)
Abstract
An innovative mechanistic based method for passive confinement efficiency estimation is proposed based on the extension to rectangular sections of the pulley model previously proposed by the writers. A refined finite element model was developed using a nonlinear concrete constitutive law in order to analyze stresses in columns passively confined with fiber reinforced polymer wraps. Rectangular and square cross sections of variable corner radii were investigated with reference to a circular cross section. Results showed an increase in corner stresses with sharper corner radii, a localization of failure at the corners, and a decrease in confinement effectiveness with an increase in the rectangularity of the cross section or an increase in corner sharpness. A rigorous numerical method for calculating geometric confinement efficiency factors is proposed and typical factors are calculated and compared with the predictions of the simple pulley model showing good agreement.Keywords
This publication has 14 references indexed in Scilit:
- Comparative Study of Models on Confinement of Concrete Cylinders with Fiber-Reinforced Polymer CompositesJournal of Composites for Construction, 2003
- Performance of Axially Loaded Short Rectangular Columns Strengthened with Carbon Fiber-Reinforced Polymer WrappingJournal of Composites for Construction, 2003
- Shape and “gap” effects on the behavior of variably confined concreteCement and Concrete Research, 2003
- Modelling of rectangular RC columns strengthened with FRPCement and Concrete Composites, 2003
- Strength and strain capacities of concrete compression members reinforced with FRPCement and Concrete Composites, 2003
- Behavior of FRP Jacketed Concrete Columns under Eccentric LoadingJournal of Composites for Construction, 2001
- Effect of Column Parameters on FRP-Confined ConcreteJournal of Composites for Construction, 1998
- Composite Jacketed Concrete under Uniaxial Compression—Verification of Simple Design EquationsJournal of Materials in Civil Engineering, 1997
- Nonlinear analysis of concrete structuresComputers & Structures, 1989
- Theoretical Stress‐Strain Model for Confined ConcreteJournal of Structural Engineering, 1988