Environmentally friendly high performance timber–concrete panel

Martins, Carlos; Dias, Alfredo M. P. G.; Costa, Ricardo

doi:10.1016/j.conbuildmat.2015.07.194

Cited by 31 publications

(12 citation statements)

References 31 publications

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“…The cork granules are used in buildings mainly for insulating panels and finishing pavement layers [17], due to the capacity to resist compressive forces. The thermal properties are also favorable with a thermal conductivity of less than 0.05 (W/m·K).…”

Section: Introductionmentioning

confidence: 99%

On the Use of Vibro-Compressed Units with Bio-Natural Aggregate

et al. 2016

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Abstract:The paper deals with the use of vibro-compressed units with bio-natural components on construction. The proposed mix design of vibrated blocks consist of cork granules and/or hemp shives, with the aim to substitute polymeric elements or expanded clay, together with the use of natural hydraulic lime (NHL) as binder. An experimental campaign is presented, with mechanical tests to evaluate the influence of each component on flexural and compression behavior. The proposal is also investigated from a productive point of view, considering how it can be harmonized in the productive process of lightweight aggregate concrete units without modifications in the productive process. The tested elements could perform a certain reduction of the carbon impact, maintaining interesting mechanical properties. The application of the proposed units in several contexts, as separating elements joined with structural components, is considered to improve rehabilitation or to obtain higher performances in buildings.

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Section: Introductionmentioning

confidence: 99%

On the Use of Vibro-Compressed Units with Bio-Natural Aggregate

et al. 2016

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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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“…Existing research shows that using bamboo engineering materials as flexural members have some unfavorable aspects, such as low section stiffness and insufficient bearing and spanning capacity. In light of the research on timber-concrete and steel-concrete composite structures [16][17][18][19][20], bamboo-steel composite structures [21][22][23] and bamboo-concrete composite structures [24][25][26][27][28] have been proposed and explored to further improve the overall mechanical performance of engineering bamboo and other engineering materials [29][30][31]. To explore a more effective and reliable combination mode, a new type of bamboo-concrete composite structure using perforated steel plates as connectors was proposed.…”

Section: Introductionmentioning

confidence: 99%

Flexural behavior of bamboo–concrete composite beams with perforated steel plate connections

Wang

Wei

et al. 2020

J Wood Sci

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A new type of bamboo–concrete composite structure using perforated steel plates as connectors was proposed. To study the composite effect of this new type of composite structure, the slip behavior of bamboo–concrete shear connectors was first studied through push-out tests. Subsequently, four-point bending tests of ten bamboo–concrete composite beams were carried out. The results show that the failure of bamboo–concrete shear connectors occurred between the perforated steel plate and the concrete, and there was no obvious damage between the perforated steel plate and the bamboo. The load carrying capacity of perforated steel plate connectors was relatively stable. The failure mode was moderate failure. Considering the three stages of the load–slip curve, an exponential function is proposed to describe the load–slip curve. The failure modes of composite beams can be summarized as two types. In the first type, the bamboo beam ruptures on the bottom and the concrete dose not suffer significant damage; in the second type, the top surface of the concrete first exhibits longitudinal cracks, and finally, the bamboo beam ruptures. Compared with bamboo beams, the ultimate load of composite beams increased by 1.2–1.5 times, and the sectional stiffness of composite beams increased by 2.9–4.2 times. The equivalent section stiffness was obtained after determining the connection coefficient, and the connection coefficient γb ranged between 0.50 and 0.80 and decreased as the center spacing of the perforated steel plate increased. The equivalent cross-section stiffness obtained by different load stages of the shear slip stiffness was calculated to predict the mid-span displacement. The calculation results show that the effect of slip stiffness on the equivalent stiffness of cross section is not sensitive, and a 35% increase in slip stiffness results in a maximum increase in equivalent section stiffness of only 6%.

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Environmentally friendly high performance timber–concrete panel

Cited by 31 publications

References 31 publications

On the Use of Vibro-Compressed Units with Bio-Natural Aggregate

On the Use of Vibro-Compressed Units with Bio-Natural Aggregate

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

Flexural behavior of bamboo–concrete composite beams with perforated steel plate connections

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