Cyclic Behavior of Perfobond-Shear Connectors Subjected to Fully Reversed Cyclic Loading

Suzuki, Atsushi; Abe, Kanako; Suzuki, Kaho; Kimura, Yuichi

doi:10.1061/(asce)st.1943-541x.0002955

Cited by 27 publications

(16 citation statements)

References 12 publications

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“…To address this concern, the mechanical performance of shear connectors subjected to fully reversed cyclic stress was explored in an earlier study based on experiments (Suzuki and Kimura 2019; Suzuki et al 2020, 2021a and analytical approaches Kimura 2021; Suzuki et al 2021c). Those findings elucidated that the stud shear connectors originate tensile cracks from the embedded position.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Behavior of Steel-Concrete Composite Dowel by Clothoid-Shaped Shear Connectors under Fully Reversed Cyclic Stress

Suzuki

Hiraga

Kimura

2023

ACT

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Recently, novel types of shear connectors have been investigated enthusiastically in Europe. Among the new connector geometries, clothoid-shaped shear connectors are used practically for bridge engineering. Although various schemes for evaluating mechanical performance can be used, they were established based on the pushout test database. During their time of use, the concrete slab is expected to be subjected to fully reversed cyclic stress during an earthquake. The stress history thereby differs from those of standard pushout tests, resulting in the discrepancy from the evaluation equations. To address this concern through this study, cyclic loading tests were conducted, imposing compressive and tensile stresses cyclically. A comprehensive experiment using 14 specimens with various influential parameters revealed the cyclic behavior and stress transfer mechanism. The results confirmed that the mechanical capacity of a composite dowel with a clothoid-shaped shear connector is dependent on the stress orientation. Furthermore, the applicability of earlier evaluation formulae was clarified based on established knowledge of experimentally obtained data. Because the necessity for reflecting the stress history was demonstrated, this research newly presents a formula for evaluation of the ultimate shear strength and load-displacement relation.

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Section: Introductionmentioning

confidence: 99%

Cyclic Behavior of Steel-Concrete Composite Dowel by Clothoid-Shaped Shear Connectors under Fully Reversed Cyclic Stress

Suzuki

Hiraga

Kimura

2023

ACT

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“…It can be concluded that the energy dissipation models may be generated only depending on the load intensities of the repeated loads for the specimens adopted in this study. Tables [13][14][15][16] summarize energy dissipation amounts under the same loading conditions: Table 13 contains the cumulated energy dissipation due to 5 cycles of repeated loads of 785 kN. Table 14 contains the cumulated energy dissipation due to 5 cycles of repeated loads of 1010 kN after 5 cycles of 785 kN loads are applied in advance.…”

Section: Energy Dissipation Characteristics Under Repeated Loads Depe...mentioning

confidence: 99%

“…Kim et al [11] conducted fatigue tests on one-direction of Y-type perfobond rib shear connector, which consider service load intensities. Suzuki et al analyzed the ultimate shear strength by the fully reversed cyclic loads with studs [12] and perfobond rib shear connectors [13]. They suggested that the ultimate shear strength in cyclic loads might be lower than the estimation suggested by design specifications.…”

Section: Introductionmentioning

confidence: 99%

Shear Resistance Assessment of the Y-Type Perfobond Rib Shear Connector under Repeated Loadings

et al. 2021

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The steel–concrete composite structures consist of two different material parts, which are connected with reliable shear connectors to enable the combined action of the steel and concrete members. The shear connectors may experience either one-directional repeated cyclic loadings or fully reversed cyclic loadings depending on the structural functions and acting loadings. It is essential for structural engineers to estimate the residual shear strength of the shear connectors after action of repeated loads. The characteristics of deteriorating shear capacities of Y-type perfobond rib shear connectors under repeated loads were investigated to estimate the energy dissipating capacity as well as the residual shear strength after repeated loads. To perform the repeated load experiments four different intensities of repeated loads were selected based on the monotonic push-out tests which were performed with 15 specimens with five different design variables. The selected load levels range from 35% to 65% of the representative ultimate shear strength under the monotonic load. In total, 12 specimens were tested under five different repeated load types which were applied to observe the energy dissipating characteristics under various load intensities. It was found that the dissipated energy per cycle becomes stable and converges with the increasing number of cycles. A design formula to estimate the residual shear strength after the repeated loads was proposed, which is based on the residual shear strength factor and the nominal ultimate shear strength of the fresh Y-type perfobond rib shear connectors. The design residual shear strength was computed from the number of repeated loads and the energy dissipation amount per cycle. The reduction factor for the design residual shear strength was also proposed considering the target reliability level. The various reduction factors for the design residual shear strength were derived based on the probabilistic characteristics of the residual shear strength as well as the energy dissipation due to repeated loads.

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“…Recently, novel types of shear connectors have been developed. Suzuki et al (2021a) conducted cyclic loading tests on the component model of a composite beam possessing different configurations of perfobond-shear connectors and proposed a novel evaluation equation to reflect the mechanical interrelation between the dowel plate and the concrete inside of the rib hole. Though the results obtained through the push-out tests are reliable, experimental methods are expensive, time-consuming, difficult, and sometimes even impossible to achieve.…”

Section: Introductionmentioning

confidence: 99%

A load-slip model for stud connector in steel-concrete composite structures

Fang

Cui

et al. 2022

Advances in Structural Engineering

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A new theoretical calculation method for the load-slip curve and the shear stiffness of the stud based on Winkler’s elastic foundation beam theory and deflection differential equation of the stud is proposed. Different stress characteristics of the elastic and plastic zones of the concrete are considered in the proposed method. The accuracy of the theoretical calculation method is validated by the test results. Moreover, the effect of concrete strength, stud diameter, and yield strength on the stud load-slip curve is analyzed. The results show that the proposed model can effectively reflect the change process of the load-slip curve of the test specimen stud connector. The stud diameter, stud yield strength, and concrete strength affect the peak slip, shear stiffness, and shear capacity of stud shear connectors. With an increase in stud diameter, the peak slip, shear stiffness, and shear bearing capacity of the stud are all increased. An increase in the yield strength of the stud increases its elastic slip, peak slip, and shear capacity. Lastly, with an increase in concrete strength, the elastic slip and peak slip of the stud both decrease, whereas the shear stiffness and shear bearing capacity are increased.

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Cyclic Behavior of Perfobond-Shear Connectors Subjected to Fully Reversed Cyclic Loading

Cited by 27 publications

References 12 publications

Cyclic Behavior of Steel-Concrete Composite Dowel by Clothoid-Shaped Shear Connectors under Fully Reversed Cyclic Stress

Cyclic Behavior of Steel-Concrete Composite Dowel by Clothoid-Shaped Shear Connectors under Fully Reversed Cyclic Stress

Shear Resistance Assessment of the Y-Type Perfobond Rib Shear Connector under Repeated Loadings

A load-slip model for stud connector in steel-concrete composite structures

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