Journal ArticleDOI
Anchorage strength models for FRP and steel plates bonded to concrete
TLDR
In this paper, the authors present a review of current anchorage strength models for both fiber-reinforced polymer (FRP) and steel-to-concrete bonded joints under shear and propose a new simple and rational model based on an existing fracture mechanics analysis and experimental observations.Abstract:
External bonding of steel plates has been used to strengthen deficient reinforced-concrete structures since the 1960s. In recent years, fiber-reinforced polymer (FRP) plates have been increasingly used to replace steel plates due to their superior properties. A key issue in the design of an effective retrofitting solution using externally bonded plates is the end anchorage strength. This paper first presents a review of current anchorage strength models for both FRP-to-concrete and steel-to-concrete bonded joints under shear. These models are then assessed with experimental data collected from the literature, revealing the deficiencies of all existing models. Finally, a new simple and rational model is proposed based on an existing fracture mechanics analysis and experimental observations. This new model not only matches experimental observations of bond strength closely, but also correctly predicts the effective bond length. The new model is thus suitable for practical application in the design of FRP-to-concrete as well as steel-to-concrete bonded joints.read more
Citations
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Journal ArticleDOI
Bond-slip models for FRP sheets/plates bonded to concrete
TL;DR: In this paper, a review of existing bond strength models and bond-slip models is presented, and the results of 253 pull tests on simple FRP-to-concrete bonded joints, leading to the conclusion that a more accurate model is required.
Journal ArticleDOI
Near-surface mounted FRP reinforcement: An emerging technique for strengthening structures
L. De Lorenzis,Jinguang Teng +1 more
TL;DR: In this article, the authors provide a critical review of existing research in this area, identifies gaps of knowledge, and outlines directions for further research, including the optimization of construction details, models for the bond behaviour between NSM fiber-reinforced polymer (FRP) and concrete, reliable design methods for flexural and shear strengthening, and the maximization of the advantages of this technique.
Journal ArticleDOI
Full-range behavior of FRP-to-concrete bonded joints
TL;DR: In this article, a closed-form analytical solution is presented which is capable of predicting the entire debonding propagation process, in which the realistic bi-linear local bond slip law is employed.
Journal ArticleDOI
Intermediate crack-induced debonding in RC beams and slabs
TL;DR: In this paper, the Chen and Teng bond strength model is combined with a simple section analysis for predicting the strength of beams and slabs which fail by intermediate crack-induced debonding.
Journal ArticleDOI
Experimental study on FRP-to-concrete bonded joints
TL;DR: In this article, the authors present an experimental study on the bond shear strength between FRP and concrete using a near-end supported (NES) single-shear pull test, which was found to be in close agreement with the predictions of Chen and Teng's [J. Struct. Eng. 127(2001) 784] bond strength model.
References
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Book
Reinforced Concrete: Mechanics and Design
TL;DR: In this article, the principles, properties and applications of reinforced concrete are described in a step-by-step approach in a comprehensive text on reinforced concrete, reflecting new insights and recent developments.
Journal ArticleDOI
Contribution of Externally Bonded FRP to Shear Capacity of RC Flexural Members
TL;DR: In this article, the authors present a review of the current research on shear strengthening with FRP and propose design algorithms to compute the contribution of FRP to the shear capacity of RC flexural members.
Journal ArticleDOI
Bond and force transfer of composite material plates bonded to concrete
TL;DR: In this article, a single-lap shear test specimen was used to study the bond strength and force transfer of graphite/epoxy composite material plates adhered to concrete.
Journal ArticleDOI
Prediction of Failure Load of R/C Beams Strengthened with FRP Plate Due to Stress Concentration at the Plate End
TL;DR: In this paper, a method for calculating shear and normal stress concentration at the cutoff point of a composite plate is presented, which is based on linear elastic behavior of the materials.
Journal ArticleDOI
Strengthening of RC beams with epoxy-bonded fibre-composite materials
TL;DR: In this paper, the authors identify and analyse collapse mechanisms for reinforced concrete beams with externally bonded fiber-reinforced plastic (FRP) materials, and obtain equations describing each failure mechanism using the strain compatibility method and concepts of fracture mechanics.
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