Shear performance of a novel demountable steel-concrete bolted connector under static push-out tests

Yang, Fei; Liu, Yuqing; Jiang, Zhibo; Xin, Haohui

doi:10.1016/j.engstruct.2018.01.005

Cited by 79 publications

(29 citation statements)

References 27 publications

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“…(a) Bolted shear connector with coupler [43] (b) Novel bolted connector [45] Bolted shear connector with embedded bolt, embedded coupler and external bolt is a novel demountable shear connector studied by von Arnim [43] and Nijgh et al [30]. The advantage of this concept is that the dismantling process is facilitated and simplified by unscrewing the external bolt from underside of the steel flange.…”

Section: Bolted Shear Connector With Coupler Systemmentioning

confidence: 99%

Towards a demountable composite slab floor system

2019

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Composite slab consisting of in-situ casted reinforced concrete on profiled sheeting, which is connected to steel beams by shear connectors, is a common structural flooring system in office buildings and car parks. The headed welded studs are inexpensive and rather easy to use in-situ because they can be welded to the steel beam through the metal sheeting. A permanent link is created between the composite slab and steel beams leading to rather time-consuming and expensive deconstruction process. Various types of bolted shear connections, recently investigated by various researchers in Europe, Australia, USA, provide a demountable alternative for the flooring system. This paper describes the experimental study using a bolted shear connector consisting of an embedded bolt/coupler and external bolt, originally developed for a prefabricated concrete deck. A full-scale composite beam was tested under working loads up to 6.25kN/m 2 in a 4-point bending. In addition to bolted shear connectors a timber joist is embedded in the composite slab over the web of the steel beam. After the first life cycle, the timber joist provides the cut edge of the slab. The experiment is used to model behaviour in the first life cycle. The composite slab was then cut, demounted, re-assembled and tested again in the second life cycle. The load was applied up to 6.25kN/m 2 and finally to the failure. Multiple arrangements of shear connectors were investigated to analyse performance of "a modified composite slab". Experience gained on the experiments of testing the composite beam in the first and the second life cycle is accompanied by FE analysis.

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Section: Bolted Shear Connector With Coupler Systemmentioning

confidence: 99%

Towards a demountable composite slab floor system

2019

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“…3). Łączniki śrubowe mogą być stosowane zarówno w płytach prefabrykowanych [6,7], jak i monolitycznych [8]. Ich nośność reguluje się średnicą oraz klasą śruby.…”

Section: Proponowany Sposóbunclassified

Analiza Wzmocnienia Stalowych Belek Stropowych Poprzez Ich Zespolenie Z Płytą Żelbetową

Nawrot¹,

Częstochowska²

2019

Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo

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Celem niniejszej pracy jest analiza zmiany nośności na zginanie i ugięcia stalowej belki stropowej, którą wzmocniono, zespalając ją z istniejącą żelbetową płytą stropową. Konieczność wzmocnienia przekroju podyktowana była wzrostem wartości dotychczasowego obciążenia z uwagi na zmianę sposobu użytkowania obiektu. Zaproponowano zespolenie za pomocą śrub wysokiej wytrzymałości. Wyznaczono nośność na zginanie oraz wartość strzałki ugięcia belki dla stanu przed i po wzmocnieniu dla trzech różnych rozpiętości przęsła. Określono procentowy przyrost nośności oraz wartość ostatecznego ugięcia wzmacnianego elementu. Wykazano, że dla analizowanych przypadków nośność na zginanie belki po wzmocnieniu (zespoleniu) wzrasta ok. dwukrotnie, a wartość strzałki ugięcia maleje od 26 do 59%. Potwierdzono przydatność proponowanego rozwiązania jako alternatywę dla tradycyjnych sposobów wzmacniania stalowych belek stropowych.

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“…Lam & Saveri [6]), (pretensioned) bolted shear connectors (e.g. Liu et al [7], Pavlovic [8]), embedded bolt-coupler systems with an external bolt (Nijgh et al [9], Kozma et al [10], Yang et al [11]), to more complex alternatives (e.g. Suwaed & Karavasilis [12,13]).…”

Section: Introductionmentioning

confidence: 99%

“…The fabrication and execution tolerances can be accounted for by opting for an oversize bolt hole, in case of a bolted shear connector. However, an increased bolt-to-hole clearance leads to a decrease in effective shear connector stiffness [11]. Injecting the remaining bolt-to-hole clearance with an epoxy resin has the potential to mitigate the decrease in effective shear connector stiffness in composite beams (Nijgh [14]).…”

Section: Introductionmentioning

confidence: 99%

Elastic behaviour of a tapered steel-concrete composite beam optimized for reuse

Nijgh¹,

Gîrbacea

Veljković³

2019

Engineering Structures

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Steel-concrete composite beams are widely used in practice because of their simple construction sequence and economic cross-section design. Reuse of traditional composite beams is not possible due to the permanent connection between the steel beam and concrete deck established by welded headed studs. To allow for fast construction, demountability and reuse of composite beams, various demountable shear connectors can be used. In this paper the results of experiments carried out on demountable and reusable tapered composite beams, consisting of a tapered steel beam and large-scale prefabricated concrete decks, are presented. The performance of various arrangements of resin-injected bolt-coupler shear connectors was considered to optimize the beneficial effect of composite action whilst minimizing the number of shear connectors. An advantage of resin-injected bolted shear connectors is that composite action is obtained instantaneously and simultaneously for all connectors. Demountability and reusability of the composite beam were successfully demonstrated experimentally. Experimental and numerical results indicated that the number of shear connectors necessary to fulfil deflection and end-slip limits can be reduced by concentrating them near the supports of a simply-supported beam. Results obtained using finite element models closely matched the experimental results in terms of deflection, stresses and curvature.

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Shear performance of a novel demountable steel-concrete bolted connector under static push-out tests

Cited by 79 publications

References 27 publications

Towards a demountable composite slab floor system

Towards a demountable composite slab floor system

Analiza Wzmocnienia Stalowych Belek Stropowych Poprzez Ich Zespolenie Z Płytą Żelbetową

Elastic behaviour of a tapered steel-concrete composite beam optimized for reuse

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