Study on the composite mechanism of large Rubber-Sleeved Stud connector

Zhuang, Bozhou; Liu, Yuqing

doi:10.1016/j.conbuildmat.2019.03.303

Cited by 29 publications

(6 citation statements)

References 17 publications

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“…In 1975, the prestressed concrete composite bridge with corrugated steel web was employed for the first time in a bridge in France. For connecting steel and concrete components in composite structures, the shear connector is the most important component [3][4][5]. The stud connector, Perfobond shear connector (PBL), embedded shear connector (ESC), and angle steel connector are commonly applied in steel-concrete composite bridges, as illustrated in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

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Shear Behavior and Design of Innovative Stud-Reinforced Embedded Shear Connectors with Flanges

Zhang,

Jin,

Deng

et al. 2024

Buildings

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The embedded shear connector with flanges (ESCF) exhibits excellent shear performance in the steel–concrete composite beam. The ESCF consists of embedded corrugated steel web as the shear connector and shape-matched flanges for construction convenience. However, previous research showed that the steel flange of the ESCF was prone to local buckling when subjected to shear force, resulting in insufficient shear strength of the connector. In this paper, head studs were adopted to reinforce the ESCF at the flange with a large width-to-thickness ratio. Nine stud-reinforced embedded shear connectors with flanges (SR-ESCF) were manufactured to conduct the push-out test to investigate the shear performance of SR-ESCF. The effects of the reinforcing studs, thickness of the web, width-to-thickness ratio of the flange, embedding depth of the web, and diameter of the combined rebar on shear strength of the SR-ESCF were revealed and discussed thoroughly. The push-out test results showed that the head studs significantly improved the initial stiffness and load-bearing capacity of the ESCF, which were increased by 17% and 15%, respectively. Moreover, the head studs prevented local buckling of the steel flange. The shear strength of the specimens was greatly influenced by the embedding depth of the web, the width-to-thickness ratio of the flange as well as the reinforcing studs. However, the diameter of the combined rebar and thickness of the web had negligible effects on the shear capacity of the SR-ESCF. According to the test results, the nonlinear finite element model (FEM) and the shear capacity of SR-ESCF prediction formula were created and verified. Furthermore, the layout of the reinforcing studs welded on the flange of the SR-ESCF was optimized by the validated FEM, which indicated that the shear-bearing capacity of the SR-ESCF could be significantly increased by adding studs on the steel flange near the original studs. This research will be of great significance to the design and implementation of the steel–concrete composite beam bridge with corrugated steel web.

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Section: Introductionmentioning

confidence: 99%

“…Buildings 2024, 14, x FOR PEER REVIEW components in composite structures, the shear connector is the most important c nent [3][4][5]. The stud connector, Perfobond shear connector (PBL), embedded shea nector (ESC), and angle steel connector are commonly applied in steel-concrete com bridges, as illustrated in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Shear Behavior and Design of Innovative Stud-Reinforced Embedded Shear Connectors with Flanges

Zhang,

Jin,

Deng

et al. 2024

Buildings

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“…For reducing the stiffness of connectors, a common treatment is wrapping low elastic modulus materials such as foamed plastic, resin mortar, flexible gems, and rubber sleeves (Abe and Hosaka 2002;Mitsunori et al 2000;Deng et al 2020;Zeng et al 2020;Zhuang and Liu 2019;Zhuang et al 2018Zhuang et al , 2020. Abe and Hosaka (2002) applied a new type of flexible connectors to a railway bridge, and verified it could effectively reduce tensile stress generated over the regions at intermediate supports.…”

Section: Introductionmentioning

confidence: 99%

“…The research on uplift-restricted and slip-permitted connector showed it had greater slip deformation and could reduce tensile stress of concrete in the negative moment region of composite beams compared with ordinary connectors (Nie et al 2015;Li et al 2019). Furthermore, Zhuang et al (2018Zhuang et al ( , 2019Zhuang et al ( , 2020 and Xu et al (2020; investigated the shear mechanism and fatigue performance of rubber-sleeved studs (RSS). Besides, the effects of rubber sleeve height, thickness, stud length, and stud diameter on the shear resistance of rubber-sleeved studs was studied by Xu et al (2016) and Su et al (2021).…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the Mechanical Behavior of Prestressed Continuous Composite I-Girder Bridges with Partial Connection

Tang

et al. 2023

J. Bridge Eng.

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In the prestressed composite girder bridges, the shear connectors will transfer a portion of prestress to the steel girders.However, more prestress is preferred to be remained in the concrete slab to improve its anti-cracking behavior and serviceability performance. A Partial Connection-Prestressing (PCP) method is proposed in this paper to decrease the prestress transferred to steel girders. The partial connection is achieved by applying Rubber-Sleeved Studs (RSS) in the prestressed concrete slab in the negative moment region. Since there is no experimental research regarding PCP method in continuous composite girders, two continuous girders specimens were tested under four-point static load to evaluate their mechanical performance. The test results showed that without decreasing ultimate strength and overall stiffness of the steel-concrete composite girders, the PCP method enhanced the cracking load by 3.1 times. Besides, only 12.5% of the prestressing force was transferred into the steel girder at the internal support section with PCP method, while that in girder without PCP reached 25.9%. Thereafter, to elucidate the partial interaction effect and prestress effect on continuous girders' mechanical behavior, numerical models were developed and calibrated with the test results. It was revealed in the numerical analysis that compared with normal composite girder, applying RSS or prestress alone can improve the cracking load respectively by 11.8% and 157.0 %, while the figure increases to 234.3% when applying RSS and prestressing at the same time. The results indicate that applying RSS in the negative moment region can effectively increase the prestressing efficiency in the concrete slab as well as enhance the bridge serviceability and durability.

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“…Therefore, they can be used in UHPC to improve the connection ductility. Although the effect of rubber sleeves on the static and fatigue behavior of the shear connectors in NSC has been clarified [26][27][28][29][30], there is no report on the behavior of rubber-sleeved stud shear connectors embedded in UHPC.…”

Section: Introductionmentioning

confidence: 99%

Static and Fatigue Behavior of Rubber-Sleeved Stud Shear Connectors as Part of Field-Cast Ultra-High Performance Concrete Connections

Zhang

2020

Materials

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Field-cast ultra-high performance concrete (UHPC) connections are an innovative and prospective solution for combining full-depth precast concrete decks and steel girders. However, previous studies show that the slip capacity of stud shear connectors embedded in UHPC cannot meet the requirements for ductile connectors by Eurocode 4, which can reduce the resistance of steel and concrete composite members. In this study, the rubber-sleeved stud shear connector, which is a composite of ordinary stud and rubber sleeve, was adopted for the field-cast UHPC connections. Push-out tests were conducted to investigate the static and fatigue behavior of the rubber-sleeved stud shear connector as part of field-cast UHPC connections. Results of static tests showed that the rubber-sleeved stud shear connector has sufficient deformation capacity and its slip capacity is 1.5 times that of the ordinary stud shear connector. Compared to ordinary stud shear connectors, UHPC with high strength and stiffness has a relatively small effect on improving the shear strength and stiffness of rubber-sleeve stud shear connectors. Results of fatigue tests showed that the rubber-sleeved stud shear connector in UHPC has similar fatigue behavior to that in normal strength concrete. Though UHPC improves the restraint to the stud deformation, the influence of rubber sleeves is still decisive in determining the fatigue behavior of rubber-sleeve stud shear connectors. In addition, based on the results of strain gauges at stud roots, it was found that the crack initiation process consumes a small proportion of the fatigue life of rubber-sleeved stud shear connectors, which is about 5%.

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Study on the composite mechanism of large Rubber-Sleeved Stud connector

Cited by 29 publications

References 17 publications

Shear Behavior and Design of Innovative Stud-Reinforced Embedded Shear Connectors with Flanges

Shear Behavior and Design of Innovative Stud-Reinforced Embedded Shear Connectors with Flanges

Experimental and Numerical Study on the Mechanical Behavior of Prestressed Continuous Composite I-Girder Bridges with Partial Connection

Static and Fatigue Behavior of Rubber-Sleeved Stud Shear Connectors as Part of Field-Cast Ultra-High Performance Concrete Connections

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