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Martina Sciomenta
Department of Civil, Architecture and Building and Environmental Engineering, University of L’Aquila, Via Giovanni Gronchi 18, 67100 L’Aquila, Italy

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Erratum
Published: 04 May 2021 in Construction and Building Materials
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ACS Style

Martina Sciomenta; Luca Spera; Chiara Bedon; Vincenzo Rinaldi; Massimo Fragiacomo; Manuela Romagnoli. Corrigendum to “Mechanical characterization of novel Homogeneous Beech and hybrid Beech-Corsican Pine thin Cross-Laminated timber panels” [Constr. Build. Mater. 271 (2021) 121589]. Construction and Building Materials 2021, 288, 123495 .

AMA Style

Martina Sciomenta, Luca Spera, Chiara Bedon, Vincenzo Rinaldi, Massimo Fragiacomo, Manuela Romagnoli. Corrigendum to “Mechanical characterization of novel Homogeneous Beech and hybrid Beech-Corsican Pine thin Cross-Laminated timber panels” [Constr. Build. Mater. 271 (2021) 121589]. Construction and Building Materials. 2021; 288 ():123495.

Chicago/Turabian Style

Martina Sciomenta; Luca Spera; Chiara Bedon; Vincenzo Rinaldi; Massimo Fragiacomo; Manuela Romagnoli. 2021. "Corrigendum to “Mechanical characterization of novel Homogeneous Beech and hybrid Beech-Corsican Pine thin Cross-Laminated timber panels” [Constr. Build. Mater. 271 (2021) 121589]." Construction and Building Materials 288, no. : 123495.

Journal article
Published: 30 March 2021 in Engineering Structures
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Self-Tapping Screws (STSs) are commonly used to realize many geometrical configurations for connections that are characterized by enhanced stiffness and load-carrying capacity. The analysis of STS joints and composite systems, however, usually requires designers to account for several aspects in their actual load transfer mechanisms, and most of them require refined calculation tools. In this paper, an extended Finite Element (FE) investigation is proposed for timber-to-timber slabs with STS joints, based on full 3D brick models inclusive of Cohesive Zone Modelling (CZM) techniques and damage constitutive laws for the materials in use. The final goal of the study takes advantage of the global and local performance assessment of a selection of STS joints, with careful consideration for their response under a conventional Push-Out (PO) test setup or a full-size bending configuration. As shown, major FE outcomes are discussed to elaborate a design procedure that can be developed on the base of correlation coefficients for maximum force and stiffness calculations in a given slab and loading condition. Major effects due to variable loading configurations are in fact explored at the screw level. Further, geometrically simplified spring-based FE models, that hardly capture the complex behaviour of the examined systems but are largely used in design practice, are presented in comparison to refined FE approaches and literature efforts. As shown, the variation of maximum force and stiffness parameters for STSs is emphasized in the paper for a selection of configurations, and fitting curves are proposed to estimate the STS performance along a given full-size slab, thus suggesting the feasibility and possible generalization of the procedure.

ACS Style

Chiara Bedon; Martina Sciomenta; Massimo Fragiacomo. Correlation approach for the Push-Out and full-size bending short-term performances of timber-to-timber slabs with Self-Tapping Screws. Engineering Structures 2021, 238, 112232 .

AMA Style

Chiara Bedon, Martina Sciomenta, Massimo Fragiacomo. Correlation approach for the Push-Out and full-size bending short-term performances of timber-to-timber slabs with Self-Tapping Screws. Engineering Structures. 2021; 238 ():112232.

Chicago/Turabian Style

Chiara Bedon; Martina Sciomenta; Massimo Fragiacomo. 2021. "Correlation approach for the Push-Out and full-size bending short-term performances of timber-to-timber slabs with Self-Tapping Screws." Engineering Structures 238, no. : 112232.

Journal article
Published: 20 November 2020 in Construction and Building Materials
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The great Beech forests extension in Europe has recently led to investigate the possible application of this hardwood species for the production of Cross-Laminated Timber (CLT) panels. In order to define the goodness of Beech CLT panels for structural applications, an extensive experimental study on novel, three-layered CLT panels made up with short procurement chain, Beech-Corsican Pine timber and melamine based adhesive was performed. The main aim is to define and summarize the mechanical performances of CLT panels both in the homogeneous and hybrid configurations. Major support is derived from bending and shear experimental investigations, both for the in-plane and perpendicular to-plan directions. Moreover, based also on Finite Element (FE) numerical simulations, the local and global mechanical performance of these novel panels is further assessed, towards a widely diffused market product (C24 Spruce CLT panels). The collected experimental and numerical results reveal an overall good behavior of homogeneous hardwood panels, and an excellent performance of hybrid softwood-hardwood configuration, with great opportunity on construction applications.

ACS Style

Martina Sciomenta; Luca Spera; Chiara Bedon; Vincenzo Rinaldi; Massimo Fragiacomo; Manuela Romagnoli. Mechanical characterization of novel Homogeneous Beech and hybrid Beech-Corsican Pine thin Cross-Laminated timber panels. Construction and Building Materials 2020, 271, 121589 .

AMA Style

Martina Sciomenta, Luca Spera, Chiara Bedon, Vincenzo Rinaldi, Massimo Fragiacomo, Manuela Romagnoli. Mechanical characterization of novel Homogeneous Beech and hybrid Beech-Corsican Pine thin Cross-Laminated timber panels. Construction and Building Materials. 2020; 271 ():121589.

Chicago/Turabian Style

Martina Sciomenta; Luca Spera; Chiara Bedon; Vincenzo Rinaldi; Massimo Fragiacomo; Manuela Romagnoli. 2020. "Mechanical characterization of novel Homogeneous Beech and hybrid Beech-Corsican Pine thin Cross-Laminated timber panels." Construction and Building Materials 271, no. : 121589.

Journal article
Published: 18 September 2020 in Applied Sciences
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Self-tapping screws (STSs) can be efficiently used in various fastening solutions for timber constructions and are notoriously able to offer high stiffness and load-carrying capacity, compared to other timber-to-timber composite (TTC) joint typologies. The geometrical and mechanical characterization of TTC joints, however, is often hard and uncertain, due to a combination of various influencing parameters and mechanical aspects. Among others, the effects of friction phenomena between the system components and their reciprocal interaction under the imposed design loads can remarkably influence the final estimates on structural capacity, in the same way of possible variations in the boundary conditions. The use of Finite Element (FE) numerical models is well-known to represent a robust tool and a valid alternative to costly and time consuming experiments and allows one to further explore the selected load-bearing components at a more refined level. Based on previous research efforts, this paper presents an extended FE investigation based on full three-dimensional (3D) brick models and surface-based cohesive zone modelling (CZM) techniques. The attention is focused on the mechanical characterization of small-scale TTC specimens with inclined STSs having variable configurations, under a standard push-out (PO) setup. Based on experimental data and analytical models of literature, an extended parametric investigation is presented and correlation formulae are proposed for the analysis of maximum resistance and stiffness variations. The attention is then focused on the load-bearing role of the steel screws, as an active component of TTC joints, based on the analysis of sustained resultant force contributions. The sensitivity of PO numerical estimates to few key input parameters of technical interest, including boundaries, friction and basic damage parameters, is thus discussed in the paper.

ACS Style

Chiara Bedon; Martina Sciomenta; Massimo Fragiacomo. Mechanical Characterization of Timber-to-Timber Composite (TTC) Joints with Self-Tapping Screws in a Standard Push-Out Setup. Applied Sciences 2020, 10, 6534 .

AMA Style

Chiara Bedon, Martina Sciomenta, Massimo Fragiacomo. Mechanical Characterization of Timber-to-Timber Composite (TTC) Joints with Self-Tapping Screws in a Standard Push-Out Setup. Applied Sciences. 2020; 10 (18):6534.

Chicago/Turabian Style

Chiara Bedon; Martina Sciomenta; Massimo Fragiacomo. 2020. "Mechanical Characterization of Timber-to-Timber Composite (TTC) Joints with Self-Tapping Screws in a Standard Push-Out Setup." Applied Sciences 10, no. 18: 6534.

Journal article
Published: 03 June 2020 in Applied Sciences
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Structures under seismic excitation undergo different inter-story drift levels that can be associated to damage of both structural and non-structural elements, and thus to the expected losses. The Modal-Displacement Based Design (DBD) procedure, in this regard, has been developed to fix major issues of Force Based Design (FBD) approaches, thus to design multi-story buildings in which the inter-story drift can allow one to control damage mechanisms. In this paper, the conventional Modal-DBD methodology is applied to multi-story timber buildings constructed using the Blockhaus technology. Given their intrinsic geometrical and mechanical features (i.e., stacking of logs, door/window openings, gaps and friction mechanisms, etc.), dedicated methods of analysis are required for them, compared to other wooden structures. A three-story case-study Blockhaus system of technical interest is thus presented for the assessment of Modal-DBD calculation steps. As shown, special care must be spent for the selection of convenient inter-story drift limits that in general should reflect the characteristics of the examined structural typology. The backbone parameters are thus collected for each shear-wall composing the 3D Blockhaus building, based on refined Finite Element (FE) analyses of separate log-walls. The overall results of the Modal-DBD process are thus finally assessed by means of a Push-Over (PO) analysis, carried out on a simplified 3D FE model of the examined multi-story structure. The comparison of FE predictions, as shown, demonstrates that reliable estimates can be obtained when the Modal-DBD procedure is applied to timber Blockhaus systems. In particular, base shear loads can be estimated with good accuracy, while the corresponding top displacements are slightly overestimated (with up to +10%–14% the expected values, for the collapse prevention performance level).

ACS Style

Martina Sciomenta; Vincenzo Rinaldi; Chiara Bedon; Massimo Fragiacomo. Application of Modal-Displacement Based Design Method to Multi-Story Timber Blockhaus Structures. Applied Sciences 2020, 10, 3889 .

AMA Style

Martina Sciomenta, Vincenzo Rinaldi, Chiara Bedon, Massimo Fragiacomo. Application of Modal-Displacement Based Design Method to Multi-Story Timber Blockhaus Structures. Applied Sciences. 2020; 10 (11):3889.

Chicago/Turabian Style

Martina Sciomenta; Vincenzo Rinaldi; Chiara Bedon; Massimo Fragiacomo. 2020. "Application of Modal-Displacement Based Design Method to Multi-Story Timber Blockhaus Structures." Applied Sciences 10, no. 11: 3889.

Journal article
Published: 01 August 2018 in Buildings
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Log-house is an ancient construction technology based on the superposition of linear timber logs, connected to the orthogonal walls by a system of carvings, notches and corner joints. Due to the fact that this solution is widely used in constructions located in seismic or windy areas, the in-plane behaviour of walls represents an attractive research topic. In this paper, major outcomes of a Finite-Element (FE) numerical investigation carried out on single corner joints currently in use for log-house buildings are discussed under different loading conditions (i.e., in-plane lateral and vertical compressive loads), including parametric analyses to capture the key aspects of their typical structural response. Careful consideration is paid for the elastic stiffness of such joints, being of primary interest for design purposed. At the same time, a linear analytical formulation is presented, with the aim of providing a simple but useful tool in support of design, and especially to estimate the maximum lateral displacement/resistance for a given log-house wall when subjected to in-plane lateral forces. There, the intrinsic mechanical features of corner joints and related aspects are properly considered (i.e., static friction phenomena, as well as the presence of small gaps, etc.). The analytical model, in addition, takes advantage of the numerically predicted joint stiffness values, being dependent on several parameters. As shown, rather good agreement is obtained between the FE model output, the analytical predictions and past reference experimental/numerical results available in the literature for full-scale log-house walls under in-plane lateral loads, hence suggesting the potential of the proposed approach. In conclusion, possible Force-Preload-Displacement (FPD) charts are presented, to act as simplified tools for preliminary design considerations.

ACS Style

Martina Sciomenta; Chiara Bedon; Massimo Fragiacomo; Angelo Luongo. Shear Performance Assessment of Timber Log-House Walls under In-Plane Lateral Loads via Numerical and Analytical Modelling. Buildings 2018, 8, 99 .

AMA Style

Martina Sciomenta, Chiara Bedon, Massimo Fragiacomo, Angelo Luongo. Shear Performance Assessment of Timber Log-House Walls under In-Plane Lateral Loads via Numerical and Analytical Modelling. Buildings. 2018; 8 (8):99.

Chicago/Turabian Style

Martina Sciomenta; Chiara Bedon; Massimo Fragiacomo; Angelo Luongo. 2018. "Shear Performance Assessment of Timber Log-House Walls under In-Plane Lateral Loads via Numerical and Analytical Modelling." Buildings 8, no. 8: 99.