Studies on FRP-concrete interface with hardening and softening bond-slip law

2012 ◽  
Vol 94 (12) ◽  
pp. 3781-3792 ◽  
Author(s):  
Hong Yuan ◽  
Xusheng Lu ◽  
David Hui ◽  
Luciano Feo
Keyword(s):  
Bond Slip ◽  
Concrete Interface ◽  
Hardening And Softening

Bond-slip behavior of CFRP plate-concrete interface

2011 ◽  
Vol 47 (5) ◽  
pp. 529-538 ◽  
Author(s):  
D. Y. Cho ◽  
S. K. Park ◽  
S. N. Hong
Keyword(s):  
Bond Slip ◽  
Cfrp Plate ◽  
Concrete Interface

Modeling of Tension-Stiffening Behavior of Reinforced Concrete Beams

2011 ◽  
Vol 368-373 ◽  
pp. 2098-2102
Author(s):  
Te Hung Liu ◽  
How Ji Chen ◽  
Chung Ho Huang ◽  
Shu Ken Lin
Keyword(s):  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Rc Beams ◽  
Local Behavior ◽  
Tension Stiffening ◽  
Bond Slip ◽  
Proposed Model ◽  
The Mean ◽  
Concrete Interface ◽  
Good Agreement

A model is proposed to analyze the tension-stiffening behavior of RC beams. The model takes into account the constitutive laws of constituent materials and the bond-slip relationship at the steel-concrete interface so that reliable responses of the RC beams in the post-cracking range can be obtained. It also allows the local behavior of RC beams to be studied in details due to the bond interaction between steel and concrete. Finally, the model capabilities are employed to analyze own experimental results. The midspan deflection and the mean steel strain of RC beams, computed with the proposed model, seem to be in good agreement with those measured in the tests.

scholarly journals Experimental and Numerical Investigation of Bond-Slip Behavior of High-Strength Reinforced Concrete at Service Load

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 293
Author(s):  
Alinda Dey ◽  
Domas Valiukas ◽  
Ronaldas Jakubovskis ◽  
Aleksandr Sokolov ◽  
Gintaris Kaklauskas
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Numerical Investigation ◽  
Load Level ◽  
Scale Model ◽  
Element Analysis ◽  
Bond Slip ◽  
Pull Out ◽  
Bond Mechanism ◽  
Concrete Interface

A bond mechanism at the reinforcement-concrete interface is one of the key sources of the comprehensive functioning of reinforced concrete (RC) structures. In order to apprehend the bond mechanism, the study on bond stress and slip relation (henceforth referred as bond-slip) is necessary. On this subject, experimental and numerical investigations were performed on short RC tensile specimens. A double pull-out test with pre-installed electrical strain gauge sensors inside the modified embedded rebar was performed in the experimental part. Numerically, a three dimensional rib scale model was designed and finite element analysis was performed. The compatibility and reliability of the numerical model was verified by comparing its strain result with an experimentally obtained one. Afterwards, based on stress transfer approach, the bond-slip relations were calculated from the extracted strain results. The maximum disparity between experimental and numerical investigation was found as 19.5% in case of strain data and 7% for the bond-slip relation at the highest load level (110 kN). Moreover, the bond-slip curves at different load levels were compared with the bond-slip model established in CEB-fib Model Code 2010 (MC2010). Overall, in the present study, strain monitoring through the experimental tool and finite element modelling have accomplished a broader picture of the bond mechanism at the reinforcement-concrete interface through their bond-slip relationship.

scholarly journals Mechanical Behavior of Fiber-to-concrete Interface in Textile Reinforced Concrete: Theoretical Model

2019 ◽  
Vol 8 (2) ◽  
pp. 70-78
Author(s):  
Shanshan Cheng
Keyword(s):  
Reinforced Concrete ◽  
Analytical Solution ◽  
Interfacial Shear Stress ◽  
Theoretical Models ◽  
Interfacial Bond ◽  
Textile Reinforced Concrete ◽  
Bond Slip ◽  
Bond Behavior ◽  
Concrete Interface

This paper presents a theoretical solution of a reinforcement-to-concrete interface model under pull-push loading. Expressions for the interfacial shear stress distribution and load-displacement history are derived for different loading stages. The full debonding propagation process is discussed in detail and the analytical solutions are verified by comparing with existing theoretical models. Results of the analytical solution are presented to illustrate how the bond length and local bond-slip law affect the interfacial bond behavior. While the case study in this paper is on textile reinforced concrete, the analytical solution is equally valid to similar mechanical cases such as rebar reinforced concretes.

Prediction Bond Strength between FRP and Concrete Interface by LEFM Method

2014 ◽  
Vol 988 ◽  
pp. 195-200 ◽  
Author(s):  
Gu Sheng Tong ◽  
Shen Shen Chen
Keyword(s):  
Model Comparison ◽  
Three Dimensional ◽  
Shear Stiffness ◽  
Bond Slip ◽  
Linear Elastic ◽  
Frp Composites ◽  
Element Simulation ◽  
Externally Bonded ◽  
Elastic Fracture ◽  
Concrete Interface

To evaluate the interface strength of externally bonded fiber-reinforced polymer (FRP) composites to concrete structures, the method of the Linear Elastic Fracture Mechanic (LEFM) model is simply used. The parameters defining the material properties, describing bond action of the FRP-concrete interface is used , which was got recently by Obaidat from three-dimensional (3D) finite-element simulation results. Both the fracture energy and shear strength of the interface are determined by a function of concrete compressive strength and the adhesive shear stiffness, the maximum transferable load is predicted by LEFM interface bond-slip model. Comparison between the predicted and the experiment results shows good agreement and a certain degree of safe estimation.

Debonding Analysis along a Softening FRP-Concrete Interface between Two Adjacent Cracks in Plated Beams

2010 ◽  
Vol 97-101 ◽  
pp. 1227-1234 ◽  
Author(s):  
Hong Chang Qu ◽  
Peng Zhang
Keyword(s):  
Adhesive Layer ◽  
Interface Shear ◽  
Bond Slip ◽  
Factors Affecting ◽  
Closed Form Solutions ◽  
Concrete Members ◽  
Frp Composites ◽  
Fibre Reinforced Polymer ◽  
Strengthened Beam ◽  
Concrete Interface

External bonding of fibre reinforced polymer (FRP) composites has become a common way for strengthening concrete members. The performance of the interface between FRP and concrete is one of the key factors affecting the behaviour of the strengthened structure. For this FRP-concrete structure, there are two types of debonding failures: plate end debonding and intermediate crack (IC) induced debonding. This paper presents an analytical solution for the second type debonding failures in FRP-concrete bonded joint model where the FRP plate is subject to tension at both ends. Both the strengthened beam and strengthening FRP are modeled as two linearly elastic Euler–Bernoulli beams bonded together through a thin adhesive layer. The debonding process of the FRP–concrete interface is discussed in detail, and closed-form solutions of bond slip, interface shear stress, and axial force of FRP in different stages are obtained. Parametric studies are further carried out to investigate the effect of the thickness of adhesive layer on the bond behavior of FRP–concrete interface.

Bond-Slip Constitutive Relationships of the CFRP/Concrete Interface

2014 ◽  
Vol 900 ◽  
pp. 426-429
Author(s):  
Xiao Yong Wu ◽  
Hui Wang
Keyword(s):  
Constitutive Relation ◽  
Bending Moment ◽  
High Strength ◽  
Bonding Interface ◽  
Fiber Reinforced Polymer ◽  
Constitutive Relationship ◽  
Bond Slip ◽  
Reinforced Polymer ◽  
Relationship Of ◽  
Concrete Interface

In consideration of the light weight, high strength, corrosion resistance and construction is convenient of carbon fiber reinforced polymer (CFRP), using CFRP to strengthen structure is becoming more and more widely. However, there is no commonly accepted understanding of the constitutive relationship of the bonding shear stress and slip between concrete and CFRP bonded interface, especially the decline of the constitutive relation is more difficult to measure accurately. An aim of this paper is to improve the experiment to explore bond stress and slip (τδ) constitutive relation of the bonding interface, strive for the experiment to measure the τδ constitutive relation curve of CFRP-concrete interface. Double pull test was proposed with the improved specimen, using the horizontal load, eliminate additional bending moment influence and improve the experimental accuracy. 17 specimens were tested to measure the τδ curves, according to the features of the constitutive relation curves, the mechanical characteristics of the bonding interface was further analysised.

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