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

Deresa, Simret Tesfaye; Xu, Jinjun; Demartino, Cristoforo; Minafò, Giovanni; Camarda, Gaetano

doi:10.2174/1874836802115010017

Cited by 10 publications

(9 citation statements)

References 35 publications

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“…Values of connector stiffnesses are considered according to references [11,12], which account for wide ranges of solutions. Additional remarks on performance comparisons are provided in Section 3.1.…”

Section: Methodsmentioning

confidence: 99%

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Stiffness Warming Potential: An Innovative Parameter for Structural and Environmental Assessment of Timber–Concrete Composite Members

Corti,

Muciaccia

2023

Sustainability

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Timber hybridization with concrete is a rising widespread strategy to obtain members with a structural performance comparable to traditional ones—e.g., RC members—but characterized by a greater sustainability potential thanks to the presence of timber-based materials; this solution is of great interest due to its low embodied carbon content, which supports the decarbonization goals set, especially for the building sector. Such systems enhance the concrete and timber favorable properties and ameliorate their detrimental characteristics, both from the structural and environmental perspectives. In general, since these two aspects are generally considered separately, a new parameter is proposed to simultaneously combine a structural performance indicator with a warming potential one. Focusing on composite slabs in bending, the stiffness warming potential (λ) is introduced, which combines the evaluation of effective bending stiffness (according to Eurocode 5 γ-method) with the Global Warming Potential—GWP (on the basis of data from Athena Impact Estimator for Building software and data from an Environmental Product Declaration of a timber panel). The method provides a multi-criteria analysis concerning the slab design accounting for vibration, deflection, and acoustic criteria when optimizing the member span. On the other hand, GWP is assessed according to cradle-to-cradle Life Cycle Assessment analysis, where two scenarios with different sustainability levels are encompassed. Results firstly confirm the viability of the novel methodology, with a different outlook on timber–concrete hybrid members, stressing the importance of maintaining thinness of the concrete layer and clearly bringing out the importance of correct re-use and/or a timber recycling management to guarantee effective reductions in terms of CO2 emissions.

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Section: Methodsmentioning

confidence: 99%

“…It is worth specifying that the e pected service life of CLT panels is taken as equal to 50 years, according to the referen EPD [31] for the CLT panels. Hence, the Global Warming Potential is estimated summing up the contributions of timber and concrete components, as shown in Equation (12).…”

mentioning

confidence: 99%

Stiffness Warming Potential: An Innovative Parameter for Structural and Environmental Assessment of Timber–Concrete Composite Members

Corti,

Muciaccia

2023

Sustainability

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“…This prevents sliding between the timber joist and the concrete slab. Their spacing gradually increases up to the centre of the beam as the shearing force decreases [8]. The common practice of this idea is to place a notch connection at the most extreme point possible to ensure high bending stiffness and hence a high composite action of the TCC beam.…”

Section: Study Objectivementioning

confidence: 99%

“…Consequently, the behaviour of a composite beam is limited between perfect behaviour which corresponds to beams with perfect adhesion between the timber joist and the concrete slab, and another without connection, where each one can slide freely when the composite beam is subjected to bending [7]. The geometric properties of this composite system will increase the strength of the beam, improve its bending stiffness and significantly reduce deflection under service loads [3], compared to a system without composite action, the behaviour of a composite system highly depends on the stiffness of its connection [8]. The notched connections are made of a cut in the beam and filled with concrete during the pouring of the slab [7,9].…”

mentioning

confidence: 99%

The influence of notch connection location on the short-term behaviour of timber-concrete composite beams, modelling of TCC beams and research for optimal locations, a numerical study

Zinelaabidine

Boudaoud

Ferhoune

2023

Frattura Ed Integrità Strutturale

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Timber-concrete composite beams, known as TCC beams, have been widely used in rehabilitation or in new buildings where several types of connections are commonly inserted to ensure partial composite action between the timber joist and the concrete slab. The notched connections represent an effective system due to their strength and ductility and it is simple to cut from timber joists. As a result, a small number is needed for the composite beam to achieve high performance in terms of bending stiffness and load-carrying capacity. This paper aims to develop a FE model for TCC beams with notched connections. It considers realistic interactions between different components. The developed FE model can satisfactorily predict the full range load-mid-span deflection curves and the failure mechanisms. The predictions agree very well with the experimental results reported in the literature, including the stiffness and the load-carrying capacity. After the validation, a numeric study was established, it aimed to research the optimal location of a notch connection between different proposed locations, to figure out which place must be installed to ensure high performance of the TCC beams. As a result of this study, the notch installed at location P3000 was found to be the optimal location to assure the highest bending stiffness. While the maximum carrying capacity was achieved at location P3750.

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“…The timber-concrete composite (TCC) beam is composed of the upper concrete slab, the bottom timber beam, and shear connections at the interface. The TCC systems were increasingly used in the construction of bridges, residential, and commercial buildings [1,2]. The concrete slab and timber beam are connected together through shear connections.…”

Section: Introductionmentioning

confidence: 99%

Shear Behaviors of Steel-Plate Connections for Timber-Concrete Composite Beams with Prefabricated Concrete Slabs

Shi¹,

Huang²,

Yang³

et al. 2023

Journal of Renewable Materials

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To promote the development of timber-concrete composite (TCC) structures, it is necessary to propose the assembly-type connections with high assembly efficiency and shear performances. This article presented the experimental results of the innovative steel-plate connections for TCC beams using prefabricated concrete slabs. The steel-plate connections consisted of the screws and the steel-plates. The steel-plates were partly embedded in the concrete slabs. The concrete slabs and the timber beams were connected by screws through the steel-plates. The parameters researched in this article included screw number, angle steel as the reinforcement for anchoring, and shallow notches on the timber surface to restrict the slip of the steel-plates. Experimental results were discussed in terms of failure modes, ultimate bearing capacities, and slip moduli. It was found that increasing the number of screws could lead to the obvious improvement on the ultimate bearing capacities and the slip moduli at the ultimate state; and the angle steel as the reinforcement showed the slight influence on the ultimate bearing capacities and the slip moduli. The application of the shallow notch can greatly improve the ultimate bearing capacities and the slip moduli. The calculation models for the ultimate bearing capacities and the slip moduli of the steel-plate connections with and without shallow notches were proposed, which showed good accuracy compared with the experimental results.

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

Cited by 10 publications

References 35 publications

Stiffness Warming Potential: An Innovative Parameter for Structural and Environmental Assessment of Timber–Concrete Composite Members

Stiffness Warming Potential: An Innovative Parameter for Structural and Environmental Assessment of Timber–Concrete Composite Members

The influence of notch connection location on the short-term behaviour of timber-concrete composite beams, modelling of TCC beams and research for optimal locations, a numerical study

Shear Behaviors of Steel-Plate Connections for Timber-Concrete Composite Beams with Prefabricated Concrete Slabs

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