Short-term performance of the HSB® shear plate-type connector for timber–concrete composite beams

Fernández-Cabo, José L.; Martitegui, Francisco Arriaga; Majano-Majano, Almudena; Íñiguez-González, Guillermo

doi:10.1016/j.conbuildmat.2011.12.035

Cited by 21 publications

(5 citation statements)

References 10 publications

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“…They performed short-term push-out, collapse, long-term collapse, and creep tests concluding that the connection provides substantial strength and stiffness. Fernandez-Cabo et al [39] conducted a short-term shear test on timber-concrete composite using HSB © (Habitat System Beton) shear plate connector, which is manufactured using aluminum alloy (Fig. 14b), Ø6 mm and 160 mm long helicoidally threaded nail was used to preassemble the connectors, so the strength and stiffness capacity of the connector were determined.…”

Section: Innovative Types Of Shear Connectors Used In Composite Systemmentioning

confidence: 99%

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Static Performances of Timber- and Bamboo-Concrete Composite Beams: A Critical Review of Experimental Results

Deresa¹,

Xu²,

Demartino³

et al. 2021

TOBCTJ

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The use of composite beams made with traditional concrete and bio-based materials (such as timber and bamboo) is a valuable solution to reduce the environmental impact of the building sector. Timber-Concrete Composite (TCC) beams have been used for decades in structural applications such as new buildings, refurbishment of old timber structures, and bridges. Recently, different researchers suggested composite beams based on engineered bamboo, commonly named Bamboo-Concrete Composite (BCC) beams. This study presents a systematic comparison of structural performances and connection behavior of TCC and BCC beams under short-term static load. TCCs beams are compared to BCC ones using similar shear connectors. The most important aspects of the two composite systems are compared: mechanical behavior of connectors and structural behaviors of full-scale composite beams (e.g., failure modes, connection stiffness, connection shear strength, ultimate load-carrying capacity, maximum deflection and composite efficiency). This comprehensive review indicates that BCC beams have similar or even better structural performances compared with TCC.

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Section: Innovative Types Of Shear Connectors Used In Composite Systemmentioning

confidence: 99%

“…. Innovative types of shear connectors used in composite system: a) picture taken from [38]: b) picture taken from[39].…”

mentioning

confidence: 99%

Static Performances of Timber- and Bamboo-Concrete Composite Beams: A Critical Review of Experimental Results

Deresa¹,

Xu²,

Demartino³

et al. 2021

TOBCTJ

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“…Within this spectrum of connections, multiple studies (e.g. [2,6,7,[11][12][13][14][15][16][17][18][19][20][21]) have identified that glued-in steel mesh or plates possess excellent levels of slip modulus, longitudinal shear strength and ductility, while other connection types such as dowels can be even more ductile [2,15].…”

Section: Building On the Status Quomentioning

confidence: 99%

Switch from connection ductility to reinforcement ductility with curvature reversal in timber-concrete composites

Sebastian

2019

Construction and Building Materials

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While multi-span continuity can be used to structurally enhance timber-concrete composites (TCCs), there has been scant research into the associated nonlinear load responses particularly of the resulting TCC zones under negative curvature. Consequently this paper presents tests to failure of TCC specimens using hardwood laminated veneer lumber joists and steel mesh connectors, one specimen (TP) under positive curvature, the other (TN) under negative curvature. It was found that the mesh connectors enabled high levels of slab-joist interaction not only in TP where the slab was almost uncracked, but also in TN where the slab exhibited pronounced cracking. Such distinct interaction enabled TN and TP to develop more than twice and six-times, respectively, the stiffness of the joist acting alone. Both TCC members exhibited encouraging ductility, the source of which switched from connection yield distributed along half the span in TP to steel rebar yield concentrated at midspan in TN. TP displayed deflection (global) and curvature (local) ductility near-plateaux over ranges close to or exceeding the corresponding elastic ranges, while for TN the ductility was manifest as low tangent stiffness regimes over deflection and curvature ranges generously exceeding the corresponding elastic ranges. A conspicuous residual hinge at midspan in TN and significant residual end slip in TP provided visual evidence of the ductility. These observations address the issue of TCC connection effectiveness in cracked concrete that has emerged from updating EC5. Crucially, the ductility of TN is predicated on the hardwood's high strain to fracture in flexure, which ensured that extensive rebar plasticity preceded failure of the timber.

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“…TCC connections based on mechanical connectors have been extensively characterised in experimental studies to date. These include nails or nail-plates [1,[5][6][7], vertical or inclined screws [6,[8][9][10][11][12], dowels [4,13,14], perforated steel plates or steel meshes bonded into the timber [3,[15][16][17], and notches [3,6,[18][19][20][21][22]. The tests have considered both normal and lightweight concretes, short-term and long-term behaviours, and the presence or absence of a formwork interlayer.…”

Section: Literature Reviewmentioning

confidence: 99%

Forward and Reverse shear transfer in beech LVL-concrete composites with singly inclined coach screw connectors

Sebastian

Piazza

Harvey³

et al. 2018

Engineering Structures

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Double-shear tests are reported on beech LVL-concrete composite connections based on coach screw connectors singly inclined at either 45 o or 90 o. On different specimens with the same screw orientation the longitudinal shear force was applied either in forward or reverse, because in practice concrete shrinkage, moisture-induced timber expansion and oscillatory (e.g. seismic) or moving loads can induce reversal of the force on the connection. The test data show that relative to the 90 o screw connections, sloping the screws to 45 o in tension only marginally affected longitudinal shear strength but led to a five-fold increase of slip modulus and to a significant drop in ductility, while sloping the screws the other way to 45 o in compression only marginally affected slip modulus but led to an almost four-fold drop in longitudinal shear strength and to a substantial increase in ductility. The specimens tested within each group showed good consistency of shear strength and (except the 45 o tension screw specimens, despite their consistent strengths) of failure mode, but high variability of slip modulus. Comparisons with previously tested timber-concrete composite (TCC) connections based on other screw types and layouts suggest good performance of the present connections. The gamma method applied to a given TCC T-section under load shows that the present alternate connections lead to quite different depths of uncracked concrete and so to significant variation of midspan deflection. In closing, it is recommended that both forward and reverse shear testing becomes a protocol for singly inclined coach screw-based TCC connections.

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Short-term performance of the HSB® shear plate-type connector for timber–concrete composite beams

Cited by 21 publications

References 10 publications

Static Performances of Timber- and Bamboo-Concrete Composite Beams: A Critical Review of Experimental Results

Static Performances of Timber- and Bamboo-Concrete Composite Beams: A Critical Review of Experimental Results

Switch from connection ductility to reinforcement ductility with curvature reversal in timber-concrete composites

Forward and Reverse shear transfer in beech LVL-concrete composites with singly inclined coach screw connectors

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