TY  - JOUR
AU  - Pavlović, Marko
AU  - Marković, Zlatko
AU  - Veljković, Milan
AU  - Buđevac, Dragan
PY  - 2013
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/542
AB  - Prefabrication of concrete slabs reduces construction time for composite steel-concrete buildings and bridges. Different alternatives for shear connectors (bolts and headed studs) are analysed here to gain better insight in failure modes of shear connector in order to improve competiveness of prefabricated composite structures. Casting of high strength bolted shear connectors in prefabricated concrete slabs offers the higher level of prefabrication comparing to a standard method of grouting welded headed studs in envisaged pockets of concrete slabs. In addition, bolted shear connectors can easily be dismantled together with the concrete slab thus allowing the improved sustainability of the construction, simpler maintenance, and development of modular structural systems. Bolted shear connectors have been rarely used in construction, actually just for rehabilitation works, because there is a lack of design recommendation. The first step towards the design recommendation is to understand the difference between the headed shear studs and the bolted shear connectors in a push-out test. Push-out tests, according to EN1994-1-1, using 4 M16 - grade 8.8 bolts with embedded nut in the same layout and test set-up as for previously investigated headed studs were performed. Finite element models for both shear connectors were created, and good match with experimental data was obtained. Basic shear connector properties such as: shear resistance, stiffness, ductility and failure modes have been compared and discussed in detail by using experimental and FE results. Parametric FE analyses of shear connector's height are carried out and shear resistance reduction factor has been proposed for bolted shear connectors.
T2  - Journal of Constructional Steel Research
T1  - Bolted shear connectors vs. headed studs behaviour in push-out tests
EP  - 149
SP  - 134
VL  - 88
DO  - 10.1016/j.jcsr.2013.05.003
ER  - 

@article{
author = "Pavlović, Marko and Marković, Zlatko and Veljković, Milan and Buđevac, Dragan",
year = "2013",
abstract = "Prefabrication of concrete slabs reduces construction time for composite steel-concrete buildings and bridges. Different alternatives for shear connectors (bolts and headed studs) are analysed here to gain better insight in failure modes of shear connector in order to improve competiveness of prefabricated composite structures. Casting of high strength bolted shear connectors in prefabricated concrete slabs offers the higher level of prefabrication comparing to a standard method of grouting welded headed studs in envisaged pockets of concrete slabs. In addition, bolted shear connectors can easily be dismantled together with the concrete slab thus allowing the improved sustainability of the construction, simpler maintenance, and development of modular structural systems. Bolted shear connectors have been rarely used in construction, actually just for rehabilitation works, because there is a lack of design recommendation. The first step towards the design recommendation is to understand the difference between the headed shear studs and the bolted shear connectors in a push-out test. Push-out tests, according to EN1994-1-1, using 4 M16 - grade 8.8 bolts with embedded nut in the same layout and test set-up as for previously investigated headed studs were performed. Finite element models for both shear connectors were created, and good match with experimental data was obtained. Basic shear connector properties such as: shear resistance, stiffness, ductility and failure modes have been compared and discussed in detail by using experimental and FE results. Parametric FE analyses of shear connector's height are carried out and shear resistance reduction factor has been proposed for bolted shear connectors.",
journal = "Journal of Constructional Steel Research",
title = "Bolted shear connectors vs. headed studs behaviour in push-out tests",
pages = "149-134",
volume = "88",
doi = "10.1016/j.jcsr.2013.05.003"
}

Pavlović, M., Marković, Z., Veljković, M.,& Buđevac, D.. (2013). Bolted shear connectors vs. headed studs behaviour in push-out tests. in Journal of Constructional Steel Research, 88, 134-149.
https://doi.org/10.1016/j.jcsr.2013.05.003

Pavlović M, Marković Z, Veljković M, Buđevac D. Bolted shear connectors vs. headed studs behaviour in push-out tests. in Journal of Constructional Steel Research. 2013;88:134-149.
doi:10.1016/j.jcsr.2013.05.003 .

Pavlović, Marko, Marković, Zlatko, Veljković, Milan, Buđevac, Dragan, "Bolted shear connectors vs. headed studs behaviour in push-out tests" in Journal of Constructional Steel Research, 88 (2013):134-149,
https://doi.org/10.1016/j.jcsr.2013.05.003 . .

TY  - JOUR
AU  - Spremić, Milan
AU  - Marković, Zlatko
AU  - Veljković, Milan
AU  - Buđevac, Dragan
PY  - 2013
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/517
AB  - Precast concrete slabs connected to the steel beams by headed shear studs arranged in groups may be used in high-rise office buildings to speed up construction process and improve quality by increasing the grade of industrialization. The paper presents experimental research performed on push-out tests at the Faculty of Civil Engineering University in Belgrade. The main goal has been to investigate possible reductions of shear stiffness and strength of five group arrangements consisting always of four headed shear studs, the shank diameter 16 mm and 100 mm height. A shape of group arrangement and its orientation to the applied load, and distance between the studs were variables considered. Intention was to have as small as possible holes in precast concrete slabs so the distance between studs was lower than minimum required in Eurocode 4. Comparison is made with results obtained on specimen with uniformly distributed shear studs, according to requirements of the standard arrangement. Material characteristics were obtained and push-out tests were preformed in procedures that fully comply with Eurocode 4. Experimental results were evaluated according to the design models in Eurocode 4 and available literature. Recommendations for use of the group arrangements were proposed.
T2  - Advanced Steel Construction
T1  - Push-out experiments of headed shear studs in group arrangements
EP  - 160
IS  - 2
SP  - 139
VL  - 9
UR  - https://hdl.handle.net/21.15107/rcub_grafar_517
ER  - 

@article{
author = "Spremić, Milan and Marković, Zlatko and Veljković, Milan and Buđevac, Dragan",
year = "2013",
abstract = "Precast concrete slabs connected to the steel beams by headed shear studs arranged in groups may be used in high-rise office buildings to speed up construction process and improve quality by increasing the grade of industrialization. The paper presents experimental research performed on push-out tests at the Faculty of Civil Engineering University in Belgrade. The main goal has been to investigate possible reductions of shear stiffness and strength of five group arrangements consisting always of four headed shear studs, the shank diameter 16 mm and 100 mm height. A shape of group arrangement and its orientation to the applied load, and distance between the studs were variables considered. Intention was to have as small as possible holes in precast concrete slabs so the distance between studs was lower than minimum required in Eurocode 4. Comparison is made with results obtained on specimen with uniformly distributed shear studs, according to requirements of the standard arrangement. Material characteristics were obtained and push-out tests were preformed in procedures that fully comply with Eurocode 4. Experimental results were evaluated according to the design models in Eurocode 4 and available literature. Recommendations for use of the group arrangements were proposed.",
journal = "Advanced Steel Construction",
title = "Push-out experiments of headed shear studs in group arrangements",
pages = "160-139",
number = "2",
volume = "9",
url = "https://hdl.handle.net/21.15107/rcub_grafar_517"
}

Spremić, M., Marković, Z., Veljković, M.,& Buđevac, D.. (2013). Push-out experiments of headed shear studs in group arrangements. in Advanced Steel Construction, 9(2), 139-160.
https://hdl.handle.net/21.15107/rcub_grafar_517

Spremić M, Marković Z, Veljković M, Buđevac D. Push-out experiments of headed shear studs in group arrangements. in Advanced Steel Construction. 2013;9(2):139-160.
https://hdl.handle.net/21.15107/rcub_grafar_517 .

Spremić, Milan, Marković, Zlatko, Veljković, Milan, Buđevac, Dragan, "Push-out experiments of headed shear studs in group arrangements" in Advanced Steel Construction, 9, no. 2 (2013):139-160,
https://hdl.handle.net/21.15107/rcub_grafar_517 .