Influential Parameters for Headed Bars in RC Beam-Column Joint

Chourasia, Ajay; Gupta, Shipali

doi:10.18520/cs/v116/i10/1666-1673

Cited by 10 publications

(6 citation statements)

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“…In the first stage, the force was resisted due to the bond near the concrete surface, and the anchoring was conducted entirely based on the bond tension, which peaked at the end of the first stage. This bond is attributed to factors such as chemical adhesion, friction, and mechanical adhesion facilitated by the ribs on the surface of the shaft, according to studies by Chourasia and Gupta (2019).…”

Section: Effect Of Nominal Shaft Diameter D Sl On N Umentioning

confidence: 99%

“…As an alternative to hook termination and straight bars, a headed bar is used to minimize the development of embedment lengths and to simplify design detailing (Chourasia and Gupta, 2019). This device is formed by a steel plate fixed to a steel reinforcement by friction welding, a forging process, a threaded connection, or a conical thread (Alrasyid et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…However, the CCD method is a semi-empirical design method with restricted anchor configurations and consequently relies heavily on test data (Bokor et al 2019). This method was designed to calculate headed connectors; therefore, the bond between the shaft and the concrete is not considered in the tensile strength of the anchor calculations (Chourasia and Gupta 2019). Another crucial factor is that this method establishes that the stress distribution from the device head to the concrete surface presents a linear behavior.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A parametric finite element study of concrete cone failure in headed bars under tensile loading

Santos,

Oliveira,

Lima

et al. 2024

Lat. Am. j. solids struct.

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This article presents a parametric numerical study of the pullout behavior of headed bars embedded in concrete elements. The finite element model was developed using Abaqus software and validated to simulate the behavior of four pullout tests. The numerical results were validated against the experimental results and showed excellent agreement with the load-slip response and failure modes. Furthermore, a parametric numerical study with 23 simulations was planned to explore the influence of several variables on concrete cone failure, including concrete strength, flexural reinforcement ratio, geometry and head size, shaft diameter, and edge and group effects. The ultimate load results, failure modes, and influence on ultimate load are discussed.

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Section: Effect Of Nominal Shaft Diameter D Sl On N Umentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A parametric finite element study of concrete cone failure in headed bars under tensile loading

Santos,

Oliveira,

Lima

et al. 2024

Lat. Am. j. solids struct.

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“…Chun and Lee assessed the contribution of headed bars to the anchorage force in external beam-column joints, specifically in the bearing and bond components. They found that the bearing components of the headed bars remained consistent, regardless of their embedded length [17][18][19][20][21]. However, further investigations have been conducted on the relationship between the bond stress and bond slip.…”

Section: Introductionmentioning

confidence: 99%

Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed Bars

Miao,

Yang,

Zhou

et al. 2023

Buildings

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Anchorage force comprises bond force and bearing pressure when headed bars are used. Pull-out tests were conducted on 120 concrete specimens to derive a method for calculating the bond force for reinforcement in straight anchor sections at the yield moment. The parameters include the diameter d, embedded length lae, and yield strength fy of the reinforcement, as well as the strength grade of the concrete fcg. The experimental results indicated that the specimens underwent three failure modes depending primarily on the embedded length lae. The nominal average bond stress τu concept was proposed and the difference between τu and the actual average bond stress τ caused by the headed bars was observed. To reduce the difference between the τu and τ values, the correction coefficient γ was proposed. Analysis indicated that γ increased with an increase in the lae/d (on average, 146% higher than the initial value) and decreased with an increase in the fy/ft (on average, 33% less than the initial value). A formula was developed to calculate γ, and the bond force in the straight anchor sections at the yield moment for the reinforcement was determined. Thus, a distributive relationship was established for the anchorage force, the bond force, and the bearing pressure.

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“…Performance of dowel bars may be enhanced by attaching a steel head anchor at the end of reinforcing bars, known as headed bar connection. Headed bars require less embedment depth and are capable of providing an adequate bond with the precast RC element [10]. Their bond strength may further be enhanced by providing grooves or ribs on the head surface [11].…”

Section: Introductionmentioning

confidence: 99%

Design of steel wire loop connection for precast reinforced concrete structural components

Singhal

Chourasia

Kajale³

2022

Scientia Iranica

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Loop connection for precast RC structural components using U-bars is advocated by researchers on the grounds of simple mechanism and strength. However, the system is difficult to materialize on-site, in the lieu of which U-bars may be replaced with steel wire ropes, which offer a more suitable system with regards to convenience during the installation process.However, literature lacks on design requirements and methodology for loop connection. Thus, a theoretical study was undertaken to formulate the design methodology for loop connection formed using steel wire ropes. The behaviour of loop connection is governed by tension and shear, influenced by characteristics of wire ropes, grout and vertical transverse bar. A design example is illustrated for loop connection between precast wall-column, whose validation is demonstrated through numerical analysis and performance compared with monolithic system and U-bar connection. The advantages of the research relates to the systematic design approach considering all the influencing parameters of steel wire loop connection for precast components. It is expected that the proposed design methodology will be useful to practising engineers for designing the loop connection for precast components.

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Influential Parameters for Headed Bars in RC Beam-Column Joint

Cited by 10 publications

References 0 publications

A parametric finite element study of concrete cone failure in headed bars under tensile loading

A parametric finite element study of concrete cone failure in headed bars under tensile loading

Research on the Distributive Relationship between Bond Force and Bearing Pressure for Anchorage Force by Headed Bars

Design of steel wire loop connection for precast reinforced concrete structural components

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