Experimental study of bond-slip performance of corroded reinforced concrete under cyclic loading

Zhou, Haijun; Lu, Junqiang; Xv, Xi; Zhou, Yingwu; Xing, Feng

doi:10.1177/1687814015573787

Cited by 15 publications

(4 citation statements)

References 16 publications

(24 reference statements)

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“…Independently of the bond element chosen, a bond law must be associated to characterize the behavior in the interface between concrete and reinforcement. In recent years, numerous research have been devoted to the study of bond models able to enclosure the bond-slip phenomenon under different load situations, as cyclic, thermal and confining loads [20]- [24], as well as different materials, e.g., fiber reinforced concrete [25], [26] and fiber reinforced polymer rebars [27], [28]. The introduction of such new bond models could be easily implemented into the system due to its high level of generalization with few changes in the graphical interface.…”

Section: Bond Modelsmentioning

confidence: 99%

RC-INSANE – an interactive environment for nonlinear analysis of reinforced concrete structures

Reges

Pitangueira

Silva

2022

Rev. IBRACON Estrut. Mater.

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The development of numerical and computational resources that can present reliable models for the analysis of reinforced concrete structures is mainly driven by its widespread use. Considering that reinforced concrete is a composite material and bond is the load-carrying mechanism, these models must consider that the structural behavior is affected by the interaction between concrete and reinforcement. On this basis, the Finite Element Method (FEM) is a well-established method able to provide consistent results for reinforced concrete modeling through reinforcement and bond models. Nevertheless, to simplify the analysis, the hypothesis of strain compatibility between concrete and reinforcement is usually considered. Under certain loads and specific geometries, this hypothesis is not valid, and the bond-slip phenomenon must be considered to fully characterize the structural behavior. To fulfill this need, this paper presents a graphic interface that enables the modeling of reinforced concrete structures through discrete and embedded reinforcement models, with the possibility to include the bond-slip phenomenon based on several constitutive laws proposed in the literature. The computational implementations were held in the INSANE (INteractive Structural ANalysis Environment), an open-source software based on the Object-Oriented Programming paradigm, which enclosures several constitutive models for nonlinear concrete modeling and different numerical techniques, and a post-processing application able to represent the results by way of a friendly-user graphic interface.

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Section: Bond Modelsmentioning

confidence: 99%

RC-INSANE – an interactive environment for nonlinear analysis of reinforced concrete structures

Reges

Pitangueira

Silva

2022

Rev. IBRACON Estrut. Mater.

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“…Previous research has demonstrated that this critical value is closely related to the concrete cover depth (Li et al, 2018), strength and type of concrete (Alavi-Fard and Marzouk, 2002; Campione et al, 2005; Hota and Naaman, 1997), and hoop confinement (Eligehausen et al, 1983) etc. Moreover, the deterioration of the bond strength is also related to the geometry and diameter of the steel bars (Li et al, 2007; Murcia-Delso et al, 2013; Zuo and Darwin, 2000), lateral pressure on the concrete (Li et al, 2018, 2022), level of corrosion (Kivell et al, 2015; Wang et al, 2019; Zhou et al, 2015) and environmental conditions (Hu et al, 2019; Xu et al, 2017). During the service life of the reinforced concrete structures, the steel bars may experience cyclic reversed loading with arbitrary amplitude (Zhang et al, 2021), and the hysteretic bond-slip relationship under reversed loading with variable amplitude shall be revealed to establish the bond stress-slip model.…”

Section: Introductionmentioning

confidence: 99%

Experimental study with DIC technique on the bond failure of structural concrete under repeated reversed loading with different amplitude

Li,

Zhang,

Wang

et al. 2023

Advances in Structural Engineering

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The bond between deformed steel rebar and concrete plays a critical role against seismic action, thus it is important to capture the dynamic bond loss and establish the bond-slip model with cyclic loading. To explain the macroscale performance such as bond-slip relationship and establish the bond strength model, it is meaningful to capture the mesoscale and local behaviors between ribs and concrete. In this paper, pull-out specimens with rebar embedded in concrete and small windows excavated in the cover concrete are adopted with DIC technique to monitor the strain variation and crack development along the interfaces under static and reversed loading of different amplitude. From the test, it is found that DIC is an effective approach to obtain the localized characteristics including the normal and shear deformations. Through parametric study, the effects of concrete cover depth and the existence of stirrups on bond deterioration in terms of both global and local behaviors are studied. Interestingly, the global slip and local crack-width show synchronically increase under the pulling-out action, which demonstrates that the macroscale behaviors could be clarified from mesoscale measurement with the aid of DIC technique.

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“…Although it must be noted that there are obvious differences between electrochemical accelerated corrosion and natural corrosion in terms of electrochemical mechanism, corrosion products and corrosion morphology (Song et al, 2008), electrochemical accelerated corrosion can qualitatively characterize the degradation of structural performance. With the development of durability research, electrochemical technology has been applied to the study of mechanical properties of corroded steel bars, bond-slip performance of corroded reinforced concrete (Zhou et al, 2015;Zhou et al, 2017), structural performance degradation of reinforced concrete beams (Ou and Nguyen 2016) and piers (Yuan et al, 2018;Zhou et al, 2020). At present, many specifications are based on the data of electric accelerated corrosion method for the deformation calculation, mechanical performance evaluation and life prediction theory of corroded reinforced concrete members.…”

Section: Introductionmentioning

confidence: 99%

Comparative experiment of steel bar corrosion at concrete construction joints

Huang¹,

Wu²,

Shen

et al. 2022

Front. Mater.

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Introduction: Construction joint is common and even inevitable in most of the reinforcement concrete structures. This study was to assess the effect of construction joints on chloride-induced corrosion of reinforcing steel in concrete.Methods: Test parameters included two environmental conditions (salt solution immersion condition and cyclic wet-dry condition), two forms of construction joint (direct wet joint and roughened wet joint) and four types of steel bar (mild steel bar, ferritic stainless-steel bar, austenitic-ferritic stainless-steel bar and epoxy-coated steel bar). The corrosion test of 90 specimens was carried out by electrochemical accelerated corrosion method. The weight loss of each steel bar and steel bar section in specimens was measured. An influence coefficient (k_j) of construction joint on local weigh loss of steel bars was defined.Results: Except for epoxy-coated steel bars, the most severe corrosion of experimental steel bars in concrete specimens all occurred at the joints, while the corrosion in non-joint sections of steel bars was relatively uniform and less. The weight loss rate of specimens has the range of 1.18% to 15.73% with an average value of 6.22%. The average k_j of mild steel bars, S11203 stainless steel bars, and S23043 stainless steel bars are 1.38, 1.92, and 1.97, respectively. The average k_j of specimens in immersion condition and cyclic wet-dry condition are 1.44 and 2.07. The corrosion of epoxy-coated steel bars mainly occurred at the damage locations of epoxy coating, not mainly at the joints.Conclusion: Chloride-induced corrosion of steel bars at construction joints was always more severe than at non-joints, especially in cyclic wet-dry environments, even for stainless-steel bar, but epoxy-coated steel bars were excluded.

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Experimental study of bond-slip performance of corroded reinforced concrete under cyclic loading

Cited by 15 publications

References 16 publications

RC-INSANE – an interactive environment for nonlinear analysis of reinforced concrete structures

RC-INSANE – an interactive environment for nonlinear analysis of reinforced concrete structures

Experimental study with DIC technique on the bond failure of structural concrete under repeated reversed loading with different amplitude

Comparative experiment of steel bar corrosion at concrete construction joints

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