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A mechanical bond model for reinforcing bar in concrete

A mechanical bond model for reinforcing bar in concrete

A mechanical bond model for reinforcing bar in concrete ...

Thus, the mechanical interlock between the reinforcing bar and concrete was weaker and weaker. The bond stress was mainly provided by friction. Furthermore, the fraction between the reinforcing bar and concrete as in the OABC segment gradually turned into the fraction between the powder of concrete and concrete on the failure surface. (4)

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A mechanical bond model for reinforcing bar in concrete ...

A mechanical bond model for reinforcing bar in concrete subjected to monotonic and reversed cyclic loading

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A new bond model for reinforcing bars in steel fibre ...

2019-11-1  An experimental program was launched to measure the bond properties of steel reinforcing bars embedded in steel FRC. The concrete mix proportions of the concrete matrix, i.e. the plain concrete before addition of steel fibres, were as tabulated in Table 3.In the concrete matrix, the paste volume was kept constant at 40%, the water/cement ratio by mass was fixed at 0.45 and the fine/total ...

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CHAPTER 4: CONCRETE-STEEL BOND MODEL

2000-12-29  ment, the reinforcing bar and the lugs on the bar (Figure 4.1). A model developed to repre-sent bond at a particular scale requires a unique set of data and is appropriate for combination with a unique set of material models. In the current investigation, bond is represented at the scale of the reinforcing bar. Development of a bond model at ...

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A new bond model for reinforcing bars in steel fibre ...

22/3/2019 A new bond model for reinforcing bars in steel fibre reinforced concrete S.H. Chu 1and A.K.H. Kwan Department of Civil Engineering, The University of Hong Kong, Hong Kong

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Bearing Angle Model for Bond of Reinforcing Bars in

This experiment's objective is to prove that the reinforcing rib's form contributes to its bond strength. The specimen is the concrete cubes measuring 150 × 150 × 150 mm; bar installed in the ...

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Modeling of bonding between steel rebar and concrete at ...

2012-2-1  Highlights A mechanical model of bonding at elevated temperatures is proposed. The relationship between the bond strength and the crack radius is established. Parametric studies are conducted and compared with the previous studies. If the concrete cover is small, the strength of the previous studies may be unconservative. The computed strength degradation can be used as a guideline for bond ...

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(PDF) Bond stress-slip model for FRP rebars in concrete

Bond is a critical design parameter that controls the performance of reinforced concrete members at both the serviceability and the ultimate limit states.

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Bond behavior between concrete and steel rebars for ...

2021-6-1  Therefore, it is very essential to achieve sufficient bond for satisfactory performance of reinforced concrete structures. Bond strength consists of three components: (1) chemical adhesion, (2) friction resistance and (3) mechanical interlock. The latter is primary for deformed bars (See Fig. 1).

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(PDF) Computational Model for Reinforcing Bar Embedded

An enhanced computational model for the prediction of reinforcing bar behavior under the generic condition of axial pullout and transverse displacement is presented. Based on the compatibility...

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CHAPTER 4: CONCRETE-STEEL BOND MODEL

2000-12-29  ment, the reinforcing bar and the lugs on the bar (Figure 4.1). A model developed to repre-sent bond at a particular scale requires a unique set of data and is appropriate for combination with a unique set of material models. In the current investigation, bond is represented at the scale of the reinforcing bar. Development of a bond model at ...

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(PDF) Bond Performances of FRP Rebars-Reinforced

György L. Balázs. Bond performance of Fibre Reinforced Polymer (FRP) bars to concrete can considerably differ from those of traditional steel because of the different physical and mechanical ...

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(PDF) Experimental Local Bond of Reinforcing Bars in ...

Engrg, Univ. of Cyprus (on leave of absence from DUTh) Abstract Abstract Stress transfer between reinforcing bar and the surrounding cementitious matrix is engaged Stress transfer between reinforcing bar and the surrounding cementitious matrix is engaged through rib translation relative to the concrete cover, and comprises longitudinal bond ...

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Elastoplastic Dilatant Interface Model for Cyclic Bond ...

2014-8-4  This paper presents a new interface model to simulate the cyclic bond-slip behavior of steel reinforcing bars embedded in concrete. A multi-surface plasticity formulation is used to model two major inelastic deformation mechanisms occurring in bond slip.

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Concrete-Steel Bond Model for Use in Finite Element ...

2004-7-1  Title: Concrete-Steel Bond Model for Use in Finite Element Modeling of Reinforced Concrete Structures Author(s): Laura N. Lowes, Jack P. Moehle, and Sanjay Govindjee Publication: Structural Journal Volume: 101 Issue: 4 Appears on pages(s): 501-511 Keywords: anchorage; bond; reinforced concrete Date: 7/1/2004 Abstract: Reinforced concrete requires bond between plain concrete and reinforcing

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Bond SP01 - - Strain Penetration Model for Fully Anchored ...

2010-3-3  Bond SP01 - - Strain Penetration Model for Fully Anchored Steel Reinforcing Bars. This command is used to construct a uniaxial material object for capturing strain penetration effects at the column-to-footing, column-to-bridge bent caps, and wall-to-footing intersections. In these cases, the bond slip associated with strain penetration ...

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Experimental Study on Bond Behavior between Plain ...

2015-10-4  To evaluate the bond behavior between the reinforcing bar and surrounding concrete, a total of six-group pullout specimens with plain steel bars and two-group specimens with deformed steel bars, serving as a reference, are experimentally investigated and presented in this study. The main test parameters of this investigation include embedment length, surface type of reinforcing bars, and bar ...

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(PDF) FRP reinforcing bars in reinforced concrete members

The bond strength of FRP reinforcement in concrete depends on many parameters, including the material and mechanical properties of the FRP bar (fiber type, modulus of elasticity and surface ...

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Bond performance of reinforcing bars in inorganic polymer ...

2007-2-27  The basic mechanical and chemical properties of fly-ash-based inorganic polymer concretes (IPC) have been studied widely, but, key engineering and structural properties of the material for instance modulus of elasticity, compressive, tensile, flexural strengths and bonding strength of the material to reinforcement have received little attention. Structural applications of reinforced IPC depend ...

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408R-03 Bond and Development of Straight Reinforcing

2005-7-24  a reinforcing bar parallel to its length with respect to the surrounding concrete. Bond strength represents the maximum bond force that may be sustained by a bar. The terms development strength and splice strength are, respectively, the bond strengths of bars that are not spliced with other bars and of bars that are spliced. The terms

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Open-slip coupled model for simulating three-dimensional ...

2010-10-25  The bond mechanism for reinforcing bars in concrete is equivalent to the normal contact and friction between the inclined ribs and the surrounding concrete. Based on the contact density model for the computation of shear transfer across cracks, an open-slip coupled model was developed for simulating three-dimensional bond behavior for reinforcing bars in concrete.

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(PDF) Experimental Local Bond of Reinforcing Bars in ...

Engrg, Univ. of Cyprus (on leave of absence from DUTh) Abstract Abstract Stress transfer between reinforcing bar and the surrounding cementitious matrix is engaged Stress transfer between reinforcing bar and the surrounding cementitious matrix is engaged through rib translation relative to the concrete cover, and comprises longitudinal bond ...

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Bond behaviour of reinforcing bars in UHPFRC SpringerLink

2015-5-21  The use of steel fiber reinforced concrete is known to improve the mechanical properties, control the crack formation and increase the ductile behaviour of the concrete. Thus it was found that such enhanced properties lead to an increase in the bond between steel fiber reinforced concrete and deformed steel bar [8, 11, 15, 18, 21, 30].

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A F.E.M. MODEL FOR THE EVALUATION OF THE SEISMIC

2009-8-7  The influence of the bond behavior of steel reinforcing bars and surrounding concrete on the global structural behavior of the beam-column joint subassemblage and the joint shear demand is highlighted, referring to a typical interior joint. An interior beam-column joint, tested by Zaid et al. (1999) has been analyzed and

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Bond performance of reinforcing bars in inorganic polymer ...

2007-2-27  The basic mechanical and chemical properties of fly-ash-based inorganic polymer concretes (IPC) have been studied widely, but, key engineering and structural properties of the material for instance modulus of elasticity, compressive, tensile, flexural strengths and bonding strength of the material to reinforcement have received little attention. Structural applications of reinforced IPC depend ...

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Bond Behavior of Reinforcing Steel Bars in Thermal ...

2019-3-14  Concrete deterioration due to the exposure of rapid F-T cycles weakens the friction force and the mechanical interaction force between steel bar and concrete and lowers the resistance against pullout. On that basis, the bond strength between steel bar and concrete decreases rapidly with increasing F-T cycles. 3.2.5.

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Bond characteristics of steel fiber and deformed ...

2020-3-14  Bond characteristics of steel fiber and deformed reinforcing steel bar embedded in steel fiber reinforced self-compacting concrete (SFRSCC) Research article Farhad Aslani, Shami Nejadi Centre for Built Infrastructure Research, School of Civil and Environmental Engineering, University of Technology Sydney, Australia

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Concrete-Steel Bond Model for Use in Finite Element ...

2004-7-1  Title: Concrete-Steel Bond Model for Use in Finite Element Modeling of Reinforced Concrete Structures Author(s): Laura N. Lowes, Jack P. Moehle, and Sanjay Govindjee Publication: Structural Journal Volume: 101 Issue: 4 Appears on pages(s): 501-511 Keywords: anchorage; bond; reinforced concrete Date: 7/1/2004 Abstract: Reinforced concrete requires bond between plain concrete and reinforcing

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Analytical bond strength of deformed bars in concrete due ...

2018-10-15  The bond behavior of deformed bar in concrete is important for the design and analysis of concrete structures, especially with insufficient concrete cover or confinement. This paper presents an analytical solution for the bond strength of deformed bar in concrete due to the splitting failure of concrete cover. A hypothesis of the equivalent elastic deformation field is proposed to approximate ...

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