Robotic processing of crooked sawlogs for use in architectural construction

Larsen, Niels Martin; Aagaard, Anders Kruse

doi:10.1007/s41693-020-00028-7

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…These elements can be applied in structures individually, making it necessary to explore structural typologies. Based on the examples in the literature [1][2][3][4][5], we carried out a constructive design approach in bar structures. These elements may be straight, curved, or forks (or bifurcations), and their structural connections (P) must be located at the ends of the growth trajectories.…”

Section: Construction Methodsmentioning

confidence: 99%

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Development of Construction Methods With Naturally Grown Timber and Bending-Resistant Joints

Gata

Seiter

Grizmann

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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Timber is a highly versatile material that can be used for a wide range of applications and products, including standardized construction elements such as bars, boards, and beams. However, these traditional timber constructions typically rely on straight logs, with naturally grown irregular elements like tree branches, forks, or curved logs often being discarded.Advancements in digitization tools, such as 3D scanning and image-based processing in parametric environments, allow architects and engineers to upcycle these discarded materials innovatively. This study proposes a method integrating discarded tree parts collected from timber harvesting forests. We have developed a structural joint-free knot system using timber forks that can be employed in bar-type structures. Therefore, we analyzed the morphological possibilities of the timber forks and used an optimization system based on their length and angle variations. The proposed knot system can seamlessly integrate into architectural designs with minimal processing and rapid assembly, providing a solution to managing this intelligently grown material. This approach can expand the application of grown timber in construction by utilizing naturally irregular elements that would otherwise be discarded. We suggest that this approach can extend the application of grown timber and provide a solution to managing this intelligently grown material.

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Section: Construction Methodsmentioning

confidence: 99%

“…Other design explorations incorporate tree forks in a digital workflow to assist in creating reticular shells [5]. Furthermore, the study of tree growth allows us to understand its geometry to make alterations or guidance during its early age, being able to design constructive elements that grow [6].…”

Section: Tree Parts As Load-bearing Elements In Constructionmentioning

confidence: 99%

Development of Construction Methods With Naturally Grown Timber and Bending-Resistant Joints

Gata

Seiter

Grizmann

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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“…Altering the source geometry and shaping it into a desired form also perpetuate a fabrication process based on standardization and a linear economy. Conversely, accepting the initial geometry as is or altering it only partially to assemble it in new structures is a fabrication strategy with excellent development opportunities, following the examples using crooked logs [12], timber forks [13], and irregular boulders [14].…”

Section: Working With Existing Non-standard Geometrymentioning

confidence: 99%

From concrete waste to walls: An investigation of reclamation and digital technologies for new load-bearing structures

Grangeot,

Fivet,

Parascho

2023

J. Phys.: Conf. Ser.

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The research presented in this paper highlights current practices for the end-of-life of concrete and explores opportunities in using unaltered concrete rubbles from demolition for the digital construction of structural walls. Through research by iterative making performed by the authors, relevant upcycling processes and design strategies are identified and explored to shape new tectonics specific to reclaimed concrete rubbles with non-standard variable geometries. This iterative research proposes accessible and scalable digital processes to overcome the challenges inherent to this untapped construction material. Results from small-scale prototypes provide valuable insights for full-scale processes to advance the digitization of construction and alleviate its environmental impact.

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“…This paper explores this approach and uses a stock of discarded wood logs to design a freeform gridshell. The overall concept and workflow are discussed and presented in earlier work [6] [3] [7]. This paper focuses on developing a method to obtain the optimal composition of stock elements through discrete recombination optimization.…”

Section: Introductionmentioning

confidence: 99%

Stock Optimization of Naturally Curved Wood Logs on Freeform Truss Structures

Rahbek,

Terp,

Alibrandi

et al. 2023

Journal of the International Association for Shell and Spatial

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This paper presents an optimization method for incorporating discarded naturally curved wood logs onto a freeform gridshell with a predefined topology. Though still little explored, the research field of reusing structural elements is experiencing increasing attention owing to its significant potential to reduce the environmental impact of building design. However, several constraints must be considered as the optimal structure depends on stock availability and the corresponding geometry and material properties of that given stock. Therefore, the focus is on determining the best configuration of stock elements considering the defined design objectives and constraints. The proposed method is a top-down approach, as the global topology of the structure is predetermined. Multi- objective optimization is conducted using the Strength Pareto Evolutionary Algorithm 2 (SPEA2) and a modified genetic algorithm with permutation encoding in the form of ordered crossover and scramble mutation. Furthermore, this paper introduces a Team-Based Repair (TBR) algorithm that increases the likelihood of each solution being valid for analysis. The performance of the optimization method is demonstrated on a curved gridshell structure, and the effect of the different design objectives and stock sizes on the final design is analyzed and discussed.

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Robotic processing of crooked sawlogs for use in architectural construction

Cited by 8 publications

References 4 publications

Development of Construction Methods With Naturally Grown Timber and Bending-Resistant Joints

Development of Construction Methods With Naturally Grown Timber and Bending-Resistant Joints

From concrete waste to walls: An investigation of reclamation and digital technologies for new load-bearing structures

Stock Optimization of Naturally Curved Wood Logs on Freeform Truss Structures

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