Behavior and Strength of Headed Stud–SFRCC Shear Connection. I: Experimental Study

Luo, Yunbiao; Hoki, Kazuaki; Hayashi, Kazuhiro; Nakashima, Masayoshi

doi:10.1061/(asce)st.1943-541x.0001363

Cited by 47 publications

(10 citation statements)

References 10 publications

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“…For studs in high-strength concrete, the minimum stud spacing can be smaller. As reported by Luo et al (2016), when embedded in SFRCC, studs arranged densely with a stud spacing in the direction of the shear force of only 3 . 5 D s can still possess shear strength (per stud) not less than 90% of the shear strength of a single stud. Therefore, only the tests with stud spacing in the direction of shear force larger than or equal to 3 . 5 D s were considered.…”

Section: Push-out Test Databasementioning

confidence: 56%

“…Extensive push-out tests on studs embedded in lightweight and normal weight concrete (Chinn, 1965; Davies, 1967; Ollgaard et al, 1971; Shim et al, 2004; Valente and Cruz, 2009; Wang, 2013; Xue et al, 2008, 2012) have shown that concrete properties have significant effects on the behavior of headed studs. In recent years, there is a rapid increase in the application of headed stud shear connectors in new types of concrete such as crumb rubber concrete (Han et al, 2015, 2017), high-performance concrete (HPC; Cao et al, 2017; Kim et al, 2015; Tian and Du, 2016), steel fiber–reinforced cementitious composites (SFRCCs; Luo et al, 2016). These types of concrete are not considered in current design codes such as Eurocode 4 (EN 1994-1-1, 2004) and China Code GB 50917-2013 (2013).…”

Section: Introductionmentioning

confidence: 99%

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Analytical prediction of the deformation behavior of headed studs in monotonic push-out tests

Liu

2019

Advances in Structural Engineering

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The deformation behavior of headed studs is an important issue in the design of steel and concrete composite structures. In recent years, there is a rapid increase in the application of headed stud shear connectors in new types of concrete such as crumb rubber concrete and ultrahigh-performance concrete. In this article, totally 154 monotonic push-out tests from the literature on experiments of headed stud in various types of concrete were gathered and evaluated with the aim to study the deformation behavior of headed studs. As a result of a careful analysis on the effects of stud diameter and concrete properties on the shear stiffness of studs through the historic database, a new equation for shear stiffness was proposed. The new formula is a reasonably good predictor and is suitable for studs with a diameter ranging from 10 to 30 mm in the concrete with cylinder compressive strength ranging from 22.0 to 200.0 MPa. New formula for the load-slip curve of headed stud which includes a parameter related to the shear stiffness was also proposed. It can give good prediction for the slip not only at low load level but also large load level.

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Section: Push-out Test Databasementioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Analytical prediction of the deformation behavior of headed studs in monotonic push-out tests

Liu

2019

Advances in Structural Engineering

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“…Given the low shear strength of the direct bond between ordinary concrete and the steel plate surface, which is only 0.4 MPa under ideal conditions, the cracked concrete will cause friction in the tangential direction of the interface (Tassios, 1979). Therefore, for the stud connection interface, the normal direction of the surface-tosurface contact properties between the UHPC layer and the steel bridge deck adopts the hard contact, and penalty function contact is adopted in the tangential direction, with a friction coefficient of 0.4 (Luo et al, 2016).…”

Section: Boundary Conditionsmentioning

confidence: 99%

Interfacial Behavior of the Steel–UHPC Composite Deck With Toughened Epoxy Bonding

et al. 2022

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Using traditional stud connectors to connect the ultra-high-performance concrete layer and steel deck is detrimental to the construction speed and fatigue performance of the composite structure. Connecting the steel–UHPC interface with toughened epoxy bonding is a potential alternative to avoid this issue. To explore whether the toughened epoxy bonding interface can reduce the amount of bridge deck studs or even cancel the studs, a numerical simulation was conducted in this paper. The non-toughened epoxy bonding interface, the toughened epoxy bonding interface, a few studs + toughened epoxy bonding interface, and the full stud connection interface were designed to study the interfacial behavior of the steel–UHPC composite deck. Moreover, the constitutive model of the toughened epoxy bonding interface is verified through the direct shear test and compression-shear test. The results show that the maximum interface shear stress of the toughened epoxy bonding interface is 0.61 MPa under the standard wheel load, which is 20.78% lower than that of the non-toughened epoxy bonding interface. Under the overload, the interface failure of the toughened epoxy bonding interface is more concentrated and exhibits a smaller damage area compared with the non-toughened epoxy bonding interface. When the interface defect is 5%, the toughened epoxy bonding interface only has a few interface damages, exhibiting good defect tolerance. Compared to the traditional full stud connection interface, the interface shear stress in the few studs + toughened epoxy bonding interface is more uniform, which avoids the stress concentration in the root of studs, and the studs’ average stress is significantly reduced by 63.21%. It is verified that using the toughened epoxy bonding interface can significantly reduce the amount of studs.

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“…Kim et al (2015) investigated the static behavior of headed studs with diameters of 16 and 22 mm via push-out test; the experimental results indicated that no splitting cracks were observed on the UHPC surface, and the shear capacity of the structure was improved. Luo et al (2015aLuo et al ( , 2015b depicted that embedding headed stud in steel fiber-reinforced cementitious composites (SFRCC) can obviously improve the mechanical behavior of the structure through test and numerical analysis. Kruszewski et al (2018) investigated the push-out behavior of headed shear studs welded on the surface of thin plates and embedded in UHPC through casting.…”

Section: Introductionmentioning

confidence: 99%

Shear behavior of large stud shear connectors embedded in ultra-high-performance concrete

Yin

Ding

et al. 2020

Advances in Structural Engineering

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In this article, the static shear behavior of large-headed studs embedded in ultra-high-performance concrete was investigated by push-out test and numerical analysis. A total of nine push-out specimens with single and grouped studs embedded in ultra-high-performance concrete and normal strength concrete slabs were tested. In the testing process, only shank failure appeared without cracks occurring on the surface of ultra-high-performance concrete slab when the steel–ultra-high-performance concrete specimens reached ultimate shear capacity. The shear capacity of specimens with large studs embedded in ultra-high-performance concrete slab increased by 10.6% compared those in normal concrete, and the current design codes such as Eurocode4, AASHTO LFRD 2014, and GB50017-2003 all underestimate the shear capacity of such kind of steel–ultra-high-performance concrete composite structures according to experimental results. Numerical models were established using ABAQUS with introducing damage plasticity material model. The influence of stud diameter, concrete strength, thickness of clear cover, and spacing of studs on the static shear behavior was thoroughly investigated via parametric analysis. Based on the experimental and numerical analysis, the existence of wedge block and the decrease of axis force are beneficial for improving the shear capacity of stud shear connectors.

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Behavior and Strength of Headed Stud–SFRCC Shear Connection. I: Experimental Study

Cited by 47 publications

References 10 publications

Analytical prediction of the deformation behavior of headed studs in monotonic push-out tests

Analytical prediction of the deformation behavior of headed studs in monotonic push-out tests

Interfacial Behavior of the Steel–UHPC Composite Deck With Toughened Epoxy Bonding

Shear behavior of large stud shear connectors embedded in ultra-high-performance concrete

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