Journal ArticleDOI
Strength and Ductility of Confined Concrete
Murat Saatcioglu,Salim R. Razvi +1 more
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In this article, an analytical model is proposed to construct a stress-strain relationship for confined concrete, which consists of a parabolic ascending branch, followed by a linear descending segment.Abstract:
An analytical model is proposed to construct a stress‐strain relationship for confined concrete. The model consists of a parabolic ascending branch, followed by a linear descending segment. It is based on calculation of lateral confinement pressure generated by circular and rectilinear reinforcement, and the resulting improvements in strength and ductility of confined concrete. A large volume of test data, including poorly confined and well‐confined concrete was evaluated to establish the parameters of the analytical model. Confined concrete strength and corresponding strain are expressed in terms of equivalent uniform confinement pressure provided by the reinforcement cage. The equivalent uniform pressure is obtained from average lateral pressure computed from sectional and material properties. Confinement by a combination of different types of lateral reinforcement is evaluated through superposition of individual confinement effects. The descending branch is constructed by defining the strain correspond...read more
Citations
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Journal ArticleDOI
Model of Concrete Confined by Fiber Composites
TL;DR: In this article, a simple model is presented to predict the complete bilinear stress-strain response of fiber-reinforced plastic (FRP) confined concrete columns in both axial and lateral directions.
Journal ArticleDOI
Behavior of Concrete Columns Confined by Fiber Composites
Amir Mirmiran,Mohsen Shahawy +1 more
TL;DR: In this paper, a series of uniaxial compression tests on concrete-filled fiber reinforced plastic (FRP) tubes are compared with the available confinement models in the literature.
Journal ArticleDOI
FRP-Confined Concrete Model
TL;DR: In this article, a uniaxial model for concrete confined with fiber-reinforced polymers (FRP), but also with steel jackets or conventional transverse reinforcement, is presented.
Journal ArticleDOI
Confinement Model for High-Strength Concrete
Salim R. Razvi,Murat Saatcioglu +1 more
TL;DR: In this article, a mathematical model is developed to express the stress-strain relationship of high-strength concrete confined by transverse reinforcement, which is applicable to both normal-strength and highstrength concretes, covering a strength range between 30 and 130 MPa.
Journal ArticleDOI
Stress-strain model for confined reinforced concrete in bridge piers
TL;DR: In this paper, a stress-strain model of concrete that takes confinement effects into account is developed, based on the results of a series of compression loading tests of reinforced concrete column specimens.
References
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Journal ArticleDOI
Stress-strain behavior of concrete confined by overlapping hoops at low and high strain rates
TL;DR: In this article, an experimental investigation into the behavior of short reinforced concrete columns is described, where 25 concrete units, each 450 mm (17.7 in.) square by 1200 mm (47.2 in.) high, were subjected to concentric or eccentric loads to failure at different strain rates.
Journal ArticleDOI
Observed Stress‐Strain Behavior of Confined Concrete
TL;DR: In this article, a nearly full-size reinforced concrete columns, of circular, square, or rectangular wall cross section, and containing various arrangements of reinforcement, were loaded concentrically with axial compressive strain rates of up to 0.0167/s.