Push-out tests on studs with UHPC cover embedded in UHPC-NSC composite slab

Yang, Hailin; Zheng, Yan; Shi-xu, MO; Lin, Penghui

doi:10.1016/j.conbuildmat.2022.127210

Cited by 8 publications

(3 citation statements)

References 25 publications

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“…To meet anchorage requirements and prevent shear studs from being pulled out, EC4 stipulates that the length-to-diameter ratio of studs (the ratio of stud length to stud diameter) in steel-normal concrete composite structures should be greater than 4.0 [12]. However, numerous studies have shown that the shear studs embedded in UHPC may not be subject to this restriction due to the ultra-high compressive and tensile strength, as well as the elastic modulus of UHPC, effectively restricting the deformation of shear studs [13][14][15][16][17]. Therefore, the aspect ratio of shear studs in UHPC is usually between 2.5 and 4.0 and can be classified as short studs.…”

Section: Introductionmentioning

confidence: 99%

Study of Fatigue Performance of Ultra-Short Stud Connectors in Ultra-High Performance Concrete

An,

Wang,

Zhuang

et al. 2024

Buildings

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Steel–UHPC composite bridge decking made of ultra-high performance concrete (UHPC) has been progressively employed to reinforce historic steel bridges. The coordinated force and deformation between the steel deck and UHPC are therefore greatly influenced by the shear stud connectors at the shear interface. Four fatigue push-out specimens of ultra-short studs with an aspect ratio of 1.84 in UHPC were examined to investigate the fatigue properties of ultra-short studs with an aspect ratio below 2.0 utilized in UHPC reinforcing aged steel bridges. The test results indicated that three failure modes—fracture surface at stud shank, fracture surface at steel flange, and fracture surface at stud cap—were noted for ultra-short studs in UHPC under various load ranges. The fatigue life decreased from 1287.3 × 104 to 24.4 × 104 as the shear stress range of the stud increased from 88.2 MPa to 158.8 MPa. The UHPC can ensure that the failure mode of the specimens was stud shank failure. Based on the test and literature results, a fatigue strength design S–N curve for short studs in UHPC was proposed, and calculation models for stiffness degradation and plastic slip accumulation of short studs in UHPC were established. The employment of ultra-short studs in the field of UHPC reinforcing aging steel bridges can be supported by the research findings.

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Section: Introductionmentioning

confidence: 99%

Study of Fatigue Performance of Ultra-Short Stud Connectors in Ultra-High Performance Concrete

An,

Wang,

Zhuang

et al. 2024

Buildings

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“…20 By examining the failure mechanism of the stud connection and the load-slip curve of the UHPC-steel interface, several studies proposed a shear strength formula and a load-slip relationship of embedded ultra-high-performance concrete studs. [21][22][23][24] Different numerical constitutive models and modeling methods (the cracking element method and the cracking particle method) are employed to reflect elastic-plastic mechanics and brittle fracture of the concrete lining. 25,26 In summary, studs can show the bonding performance between the reinforced steel and concrete and effectively ensure cooperative work.…”

Section: Introductionmentioning

confidence: 99%

“…The headed studs might increase the interfacial bond resistance and shear stiffness, enhance the post‐peak bond behavior, and avoid brittle failure, according to Wang et al's push‐out studies on SRC specimens 20 . By examining the failure mechanism of the stud connection and the load‐slip curve of the UHPC‐steel interface, several studies proposed a shear strength formula and a load‐slip relationship of embedded ultra‐high‐performance concrete studs 21–24 . Different numerical constitutive models and modeling methods (the cracking element method and the cracking particle method) are employed to reflect elastic–plastic mechanics and brittle fracture of the concrete lining 25,26 .…”

Section: Introductionmentioning

confidence: 99%

Research on the bond‐slip behavior and constitutive relationship between I‐shaped steel and shotcrete in tunnel

Lü

Ran

et al. 2023

Structural Concrete

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The failure of the initial support of the tunnel caused by the synergistic deformation of steel and shotcrete under high‐ground stress is expected to be solved by arranging studs and steel webs to enhance the structure's bearing capacity. Hence, the bond‐slip mechanism of steel shotcrete with or without studs is unclear. This study aims to determine the bond behavior of the interface between the steel and shotcrete composite structure for tunnel support. The findings of push‐out experiments demonstrate that shotcrete on steel flange longitudinal splitting failure is the failure mode of natural bonding specimens. Tensile failure and expansion failure under the effect of studs is the failure mechanisms of stud steel‐sprayed concrete specimens. Furthermore, experimental data and a mathematical model establish the bond‐slip constitutive law of natural bonding and stud specimens. Finally, in addition to providing a theoretical foundation for the research of bond‐slip, the constitutive model put forward in this paper also supports the prevention of initial support failure in tunnel engineering.

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Shear capacity evaluation of studs in steel-high strength concrete composite structures

Guang

2024

Applications in Engineering Science

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Push-out tests on studs with UHPC cover embedded in UHPC-NSC composite slab

Cited by 8 publications

References 25 publications

Study of Fatigue Performance of Ultra-Short Stud Connectors in Ultra-High Performance Concrete

Study of Fatigue Performance of Ultra-Short Stud Connectors in Ultra-High Performance Concrete

Research on the bond‐slip behavior and constitutive relationship between I‐shaped steel and shotcrete in tunnel

Shear capacity evaluation of studs in steel-high strength concrete composite structures

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