Application of numerical methods in analysis of timber concrete composite system

Milovanović, Dragan; Kočetov-Mišulić, Tatjana; Radujković, Aleksandra

doi:10.5937/grmk1804037m

Cited by 1 publication

(4 citation statements)

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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%

“…However, it is possible to discuss the connectors role from an environmental perspective since each type of shear connector contributes to the effective bending stiffness of the composite slab with different slip moduli. Figure 4 reports the slip modulus vs. effective bending stiffness of two slabs with a fixed geometry, as specified in Table 7: the only varying parameters are the connector type (and consequently slip moduli-KS-of which values have been adapted from literature [11,12]) and the spacing between connectors, which depends on specific issues linked with the connector. The lowest values correspond to nail or screw connection systems, then intermediate ones correspond to dowel connections-generally vertical with respect to the interface between timber and concrete-and finally dowel connections (commonly inclined of 45°) with notches.…”

Section: Stiffness Of the Connectors And Their Role In The Sustainabi...mentioning

confidence: 99%

“…On the other hand, the acoustic requirement is assessed using Equation (11), according to [16], a method that has also been applied to the study presented in [4]. As with the vibration criterion, the selected equation has been exclusively developed for TCC slabs and it is a valid mathematical model when an experimental campaign cannot be carried out or if a preliminary assessment is sought.…”

mentioning

confidence: 99%

“…A sketch of the TCC study case is presented in Figure 2a where the arrangement of shear connectors is also outlined: self-tapping screws characterized by a diameter of 12 mm and a total length of 150 mm, with a threaded length of 100 mm, are inclined at ±45 • ; for every case connector, spacing is constant, with s = 250 mm. According to literature investigations [11,12], the connector stiffness is assumed as K S = 60 kN/mm. In Figure 2, two other examples of connections in the Timber-Concrete composite slabs are also presented.…”

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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%

Section: Stiffness Of the Connectors And Their Role In The Sustainabi...mentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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