2) On experiment aspect: Firstly, ultimate bond intensity is compared on two conditions: different steel bar style and different water cement ratio. Afterwards, bond stress-slip curves of different test specimen are compared from four aspects. Conclusions derived from the above work make the law of bond performance more clear.

The embedded reinforcing steel bars,either laterally confined or unconfined,were corroded to different levels by accelerated corrosion method before being tested for bond stress-slip under cyclic loads.

A higher level of corrosion caused bond degradation primarily in the initial five loading cycles,the effect of corrosion being decreased with loading. It was also demonstrated that cyclic bond stress-slip curve depended on loading history.

A review of current experimental research and theoretical analysis on bond behavior between FRP and concrete was presented in this paper,which emphasized on test method, characteristic of force transfer,failure mode,bond strength and affecting factors, strain distribution, bond stress versus slippage relationship and anchorage strength models. Several conclusions are proposed for practical engineering application.

In addition,bond stress-slippage curves of CFRP strands and design suggestions for coefficient of relative bond properties of CFRP strands are presented based on the tests.

The bond strength coefficient proposed in this paper can be used to study the bond stress-slip relationship of corroded steel bars and concrete.

Local bond stress-slip relationships of glass fibre reinforced plastic bars embedded in concrete

For both types of test set-up, the cyclic bond stress-slip relations are presented and discussed.

Effect of confinement using steel, FRC, or FRP on the bond stress-slip response of steel bars under cyclic loading

The results of experimental investigation of the local bond stress-slip response of steel bars embedded in confined concrete and subjected to cyclic loading are presented.

In this paper, tensile and pull-out reinforced concrete bond specimens are studied by the finite element mathod. The analysis is solely based on the basic mechanical properties of concrete and reinforcing bar, and other additional assumptions, such as distribution of cracks, bond stress-slip relationship, etc., are not necessary. The cracked concrete is considered as an orthotropic body, in which the tangent modulus along the diretion of cracks is taken as its initial value E. The shear modulus G' on the cracked...

In this paper, tensile and pull-out reinforced concrete bond specimens are studied by the finite element mathod. The analysis is solely based on the basic mechanical properties of concrete and reinforcing bar, and other additional assumptions, such as distribution of cracks, bond stress-slip relationship, etc., are not necessary. The cracked concrete is considered as an orthotropic body, in which the tangent modulus along the diretion of cracks is taken as its initial value E. The shear modulus G' on the cracked surface can be determined by a method described in this paper. The tangent modultts in the direction normal to the cracks is then obtained from E and G'. In the analysis, although it is assumed that the concrete is connected directly with the adjacent steel, the slip between both materials can be found approximately from the results of the finite element analysis. Three typical bond specimens are analyzed. The calculated results for the total elongation and the strain distribution of the embedded reinforeing bar, the strains and the distribution of the internal cracks in concrete as well as the bond stress-slip relationship are essentially in good agreement with the experimental data published in foreign literatures.

In this paper, unusual features of end anchorage of longitudinal bars in reinforeed Concrete deep beams are discussed According to the test results on 16 anchorage speciments of reinforced concrete deep beams the average bond stress-bond slip relationships of the plain bars and the deformed bars in deep beams are analysed and compared with the pullout bond tests The same and the different characteristics of anchorage in deep beams and in shallow beams are specially discussed. It is indicated in this paper that...

In this paper, unusual features of end anchorage of longitudinal bars in reinforeed Concrete deep beams are discussed According to the test results on 16 anchorage speciments of reinforced concrete deep beams the average bond stress-bond slip relationships of the plain bars and the deformed bars in deep beams are analysed and compared with the pullout bond tests The same and the different characteristics of anchorage in deep beams and in shallow beams are specially discussed. It is indicated in this paper that the transverse compressive stress in anchorage zone is beneficial to the anchoroge when it is less than 0.5fck, and it is not beneficial to the anchorage when it is more than 0.5fck. The formulas for critical anchorage lengthes, the usable anchorage lengthes in design and the detailing of anchorage in deep beams are also given.

An approximate nonlinear analysis of cylinder bond specimens is performed. Due to internal cracking, the concrete around the steel bar can be regarded as a bond zone and an orthogonal anisotropic body as well. Some practical formulas of nonlinear analysis are obtained for calculating the bond stress, the slip and the stress of steel bar. The analytical results are compared with Houde’s experimental data, it shows that these formulas can be applied for researching the behavior of bond specimens and for modelling...

An approximate nonlinear analysis of cylinder bond specimens is performed. Due to internal cracking, the concrete around the steel bar can be regarded as a bond zone and an orthogonal anisotropic body as well. Some practical formulas of nonlinear analysis are obtained for calculating the bond stress, the slip and the stress of steel bar. The analytical results are compared with Houde’s experimental data, it shows that these formulas can be applied for researching the behavior of bond specimens and for modelling the bond-slip relation in finite element analysis of R. C members.