Cost optimisation of glued laminated timber roof structures using genetic algorithms

Villar-García, José Ramón; Vidal-López, Pablo; Rodríguez-Robles, Desirée; Fernández, Manuel Guaita

doi:10.1016/j.biosystemseng.2019.09.008

Cited by 17 publications

(20 citation statements)

References 18 publications

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“…Optimisation studies date back over 50 years with genetic algorithms (GAs) being widely used and recognised in the optimisation of steel and concrete structures [23]. The optimisation study used in this paper comprises of a number of continuous and discrete variables, and the GA has proven to be a powerful tool when multiple interacting variables are used [24].…”

Section: Parametric Design Optimisation Of the Barrel Vaultmentioning

confidence: 99%

Timber Vaults for Ultra-Low-Carbon Building Structures

Hossell,

Hawkins,

Darby

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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This paper explores the benefits of using curvature and arching action in timber flooring systems to reduce the embodied carbon and aid in material efficiency. In this paper, the embodied carbon of the proposed timber barrel vault system with granular infill is compared with a more conventional cross laminated timber (CLT) floor. The proposed barrel vault system is constructed out of curved glue-laminated timber that spans between supporting beams. Steel ties are used to restrain the horizontal thrust forces generated by the vault. A two-dimensional parametric optimisation of the barrel vault floor system and the CLT floor in terms of minimising embodied carbon was undertaken using a script written in MATLAB, analysed using matrix stiffness methods and optimised using a genetic algorithm. The analysis was carried out on spans ranging between 4m and 12m with the optimal solution dependent on the interaction between the fabrication stresses, arch height, and rod diameter. The resulting design for 4m to 12m spanning office floors results in a 35% to 41% reduction in embodied carbon compared to an equivalent CLT system.

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Section: Parametric Design Optimisation Of the Barrel Vaultmentioning

confidence: 99%

Timber Vaults for Ultra-Low-Carbon Building Structures

Hossell,

Hawkins,

Darby

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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“…Despite a greenhouse structure requires a 3D definition to include the influence of the external loads as well as the effect of the structural elements responsible for the connections (i.e., purlins and gutters), Briassoulis et al [33] demonstrated that the study of the main planes (two-dimensional (2D) analysis) was a valid approach in the assessment of greenhouses. In fact, such simplification has been commonly employed in both industrial and agricultural constructions [59][60][61][62][63]. In the same way, Ren et al [47] also performed a similar simplification by means of 3D models in order to decrease the computational cost.…”

Section: Geometrymentioning

confidence: 99%

Numerical Simulation of Multi-Span Greenhouse Structures

et al. 2020

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Greenhouses had to be designed to sustain permanent maintenance and crop loads as well as the site-specific climatic conditions, with wind being the most damaging. However, both the structure and foundation are regularly empirically calculated, which could lead to structural inadequacies or cost ineffectiveness. Thus, in this paper, the structural assessment of a multi-tunnel greenhouse was carried out. Firstly, wind loads were assessed through computational fluid dynamics (CFD). Then, the buckling failure mode when either the European Standard (EN) or the CFD wind loads were contemplated was assessed by a finite element method (FEM). Conversely to the EN 13031-1, CFD wind loads generated a suction in the 0–55° region of the first tunnel and a 60% reduction of the external pressure coefficients in the third tunnel was not detected. Moreover, the first-order buckling eigenvalues were reduced (32–57%), which resulted in the need for a different calculation method (i.e., elastoplastic analysis), and global buckling modes similar to local buckling shape were detected. Finally, the foundation was studied by the FEM and a matrix method based on the Wrinkler model. The stresses and deformations arising from the proposed matrix method were conservative compared to those obtained by the FEM.

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“…In order to improve on the earlier attempts at optimization, Villar-García et al [28] addressed the two-dimensional optimization of timber trusses by programming genetic algorithms according to the Eurocode 5 [26,27] requirements. Later on, the authors extended the previous investigation; the optimization was carried out on a three-dimensional roof structure composed of glulam trusses with purlins arranged accordingly [29]. Both papers were based on cost optimization, taking into account the high manpower required for triangulated structures as well as different geometric configurations.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Glulam Regular Double-Tapered Beams for Agroforestry Constructions

Simón-Portela,

Villar-García,

Rodríguez-Robles

et al. 2023

Applied Sciences

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This paper addresses the lack of attention paid by the scientific community to the optimization of timber structures, specifically in the context of large-span agro-industrial constructions. The study focuses on the optimization of a three-dimensional roof composed of GL32h glulam regular double-tapered beams and purlins. Firstly, MATLAB was employed to develop a calculation software and then run the proposed optimization model based on genetic algorithms, in order to optimize the different geometries of the construction elements based on cost, as well as the optimum arrangement of the purlins and the number of beams. Moreover, statistical analyses were carried out on more than 200 optimization data points to uncover the influence of different variables in the optimization process. It was found that the snow load and span have a significant influence on the prediction of the height and width of beams and purlins, as well as the purlin spacing; while, as expected, the roof length also influences the optimal number of beams. All these findings could promote the use of timber structures; thus, achieving more sustainable and efficient construction practices.

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Cost optimisation of glued laminated timber roof structures using genetic algorithms

Cited by 17 publications

References 18 publications

Timber Vaults for Ultra-Low-Carbon Building Structures

Timber Vaults for Ultra-Low-Carbon Building Structures

Numerical Simulation of Multi-Span Greenhouse Structures

Optimization of Glulam Regular Double-Tapered Beams for Agroforestry Constructions

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