Shear-slip behaviour of prefabricated composite shear stud connectors in composite bridges

Yan-mei, Gao; Liu, Chengjun; Wang, Xuefei; Zhou, Zhixiang; Fan, Liang; Heng, Junlin

doi:10.1016/j.engstruct.2021.112148

Cited by 18 publications

(8 citation statements)

References 26 publications

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“…This can be attributed to the additional stiffness provided by the concrete constraint and the associated damage accumulation. According to the previous work (Gao et al, 2021), the vertical steel plate in the PCSS enhances the stiffness of the specimen due to the interaction and friction between the steel and concrete interfaces. The study also indicates a rapid damage evolution in the concrete before the yielding load, along with moderate damage in studs.…”

Section: Elastic Slip and Residual Slipmentioning

confidence: 89%

“…Following the standard test procedure suggested in Annex B.2 of EN 1994-1-1 (2005), similar configurations of push-out specimens have been used in the above works, with minor adjustments in thickness and width to accommodate the variation in shear connectors. Regarding the novel PCSS, Gao et al (2021) performed experimental and numerical efforts to examine the shear-slip behaviour of the PCSS under the monotonic load. The result indicated that the ultimate capacity in the PCSS connector is 39.1% - 67.3% higher than that in the traditional stud connectors.…”

Section: Introductionmentioning

confidence: 99%

“…The static shear-slip behaviour of PCSS connectors has been investigated and validated under monotonic loads in previous work (Gao et al, 2021). Moreover, a full-scale experiment of the composite beam using PCSS connectors has verified the feasibility of PCSS in composite bridges (Wang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Cyclic performance of prefabricated composite shear stud connectors for accelerated bridge construction

Li,

Heng,

Zhou

et al. 2023

Advances in Structural Engineering

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This study examines the cyclic shear-slip performance of a novel prefabricated composite shear stud (PCSS) connector designed for accelerated bridge construction (ABC) of composite structures. An in-depth experimental procedure is employed involving the design and fabrication of four push-out specimens with two different stud configurations. The specimens are then tested under both monotonic and cyclic-to-monotonic loading protocols. Upon completion of the testing phase, a meticulous inspection of the fractography is conducted to delineate and qualify the failure mode of the PCSS connectors. Simultaneously, a comprehensive shear-slip curve is derived from the measured data, enabling a detailed analysis over the mechanical performance. Furthermore, the study calculates a series of deformation-associated indicators from the shear-slip curve, effectively quantifying the ductility, recoverability, and capacity of the PCSS. The test results accentuate a well-deformed and ductile failure mode of the tested PCSS specimens, marked by the stud fracture and crushing of surrounding concrete. This could be attributed to the constraint of vertical plates of the PCSS on the concrete, which improves the capacity and recoverability of the PCSS. Whereas, the performance of the PCSS is also notably influenced by the group nail effect, for which the ductility and per-stud capacity degrade with the increase in the number of studs. Especially, the PCSS specimen exhibits full elastic-to-plastic hysteresis loops under cyclic loads, together with the satisfied ductility, implying an excellent potential of the PCSS to dissipate energy under impact loads. In addition, the PCSS displays a robust stiffness across different cyclic loading blocks. Hence, satisfactory post-damage ductility has still been observed in the PCSS under the monotonic loading after the cyclic loading. In conclusion, this work elucidates the superiority of the PCSS in terms of capacity, ductility, and recoverability, providing a promising basis for their application in the accelerated construction of composite bridges.

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Section: Elastic Slip and Residual Slipmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Cyclic performance of prefabricated composite shear stud connectors for accelerated bridge construction

Li,

Heng,

Zhou

et al. 2023

Advances in Structural Engineering

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“…Consequently, the impact of shear connections on the load-bearing capacity of composite structures mainly manifests through the load-slip relationship [19,[22][23][24]. Prior research attests to the nonlinear elastoplastic behavior that shear connections display during the loading process [25,26]. In prior analyses, a nonlinear elastic constitutive model was employed, primarily due to the absence of an elastoplastic constitutive model [27,28].…”

Section: Introductionmentioning

confidence: 99%

A Constitutive Model for Stud Connection in Composite Structures

Qin,

Zhao

2024

Buildings

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The complexity of finite element analysis for composite structures can be significantly reduced by representing the connector and adjacent concrete as a macroscopic element. Nevertheless, the prevailing macroscopic models for shear connections predominantly employ nonlinear elastic theory. This approach introduces inaccuracies in estimating structural stiffness and load-bearing capabilities, primarily due to its inability to precisely capture the cumulative effects of plastic damage. In response, this study introduces a novel macroscopic elastoplastic model grounded in plasticity theory, aimed at accurately characterizing the nonlinear behavior of stud connections subjected to concurrent shear and tensile forces. This paper meticulously delineates the implementation of the elastoplastic constitutive model using the backward Euler method for numerical integration. It further articulates the derivation of the consistent tangent stiffness, which aligns with the convergence efficiency of the Newton–Raphson iterative approach. The computation of the element stiffness matrix for a two-node element is executed via the governing equation inherent to the finite element method. An exemplar macroelement test conducted in ABAQUS affirms the implicit backward Euler scheme’s stability and consistency across varying tolerances. Validation of the elastoplastic model against empirical test outcomes corroborates its efficacy, demonstrating the model’s precision in predicting the load–displacement behavior of stud connections under the influence of shear and tensile forces.

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“…Precast solid slabs are usually used in small span structures, and can be made into prestressed members, and the structural strength and stiffness can also be guaranteed, so in recent years, they have been more and more studied and applied (Han et al, 2016; Liu et al, 2018; Zheng et al, 2015). Prefabricated steel-concrete composite beam with multi-bolt shear connectors have been investigated by Yang et al (2020) and Gao et al (2021).…”

Section: Introductionmentioning

confidence: 99%

Preliminary investigation on the bending capacity of a novel connection between the concrete slab and steel beam

Wang

2022

Advances in Structural Engineering

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Using precast concrete floors can greatly improve the construction efficiency of steel structures, and the development of the connection between precast slabs affects the application of precast concrete floors in steel structures. In this paper, a new connection between the precast concrete floor and steel beam is proposed. The bending capacity of the connection was investigated through experiments, and compared with that of the cast-in-place floor. The test results showed that the reliability of the new connection was excellent, and the bending capacity of the floor with this connection is basically the same as that of the cast-in-place floor. The finite element software ABAQUS was employed to simulate the bending behavior of the new connection floor and cast-in-place floor, and the feasibility of the model was verified by comparing it with the experimental results. The model was used to analyze the structural response of the two types of composite beams composed of new connections and precast floor, cast-in-place floor, and steel beam, respectively. The load-bearing capacity and failure modes of the two composite beams were compared. The results showed that the bearing capacity of the composite beam fabricated with the new connection can reach that of the cast-in-place floor composite beam. This is only a preliminary investigation about the new connection and there are some limitations as well.

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Shear-slip behaviour of prefabricated composite shear stud connectors in composite bridges

Cited by 18 publications

References 26 publications

Cyclic performance of prefabricated composite shear stud connectors for accelerated bridge construction

Cyclic performance of prefabricated composite shear stud connectors for accelerated bridge construction

A Constitutive Model for Stud Connection in Composite Structures

Preliminary investigation on the bending capacity of a novel connection between the concrete slab and steel beam

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