A Reusable Structural System Fit for Geometrical Standardisation and Serial Production

Odenbreit, Christoph; Yang, Jie; Romero, Alfredo; Kozma, András

doi:10.1002/cepa.1693

Cited by 3 publications

(4 citation statements)

References 12 publications

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“…Figure5highlights a notable concentration of Structural Concepts, with 37 articles predominantly within Technical Papers and DfD strategies. This pattern is consistent with the previously discussed trend of technical solutions for structural systems designed for future reuse (DfD), with Yang J et al contributing significantly to this area[28,37,45,66,67]. Notably, Structural Concepts are also prevalent in Case studies and Design Development in combination with DfD.It is as well as the only Contribution for the less represented Circular Design strategies: Upcycling, DfD and Reuse, and Deconstruction.…”

supporting

confidence: 87%

“…Furthermore, the diagram shows that the majority of the publications are Technical Papers on DfD. The publications in this area typically focus on conducting technical assessments, verification, and performing calculations for structural elements and connections designed for easy disassembly for future reuse [25,[36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]. A plausible reason for this trend could be that it addresses a clear problem with easily accessible technical solutions, which enables significant advancements in the field without requiring extensive adjustments to current design practices.…”

Section: Research Type and Circular Designmentioning

confidence: 99%

“…CT: [103], SC: [15,86,[104][105][106] CT: [29,33] CE: [21][22][23][24]69,72,77,81,82], SC: [19] SC: [17,25,28,[36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54] Case Studies Design Development Framework Review Technical Paper CT = Computational Tool, CD = Computational Design, SC = Structural Concept, CE = Circular Economy Investigation.…”

Section: Deconstructionmentioning

confidence: 99%

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Systematic Mapping of Circular Economy in Structural Engineering

Seeberg,

Haakonsen,

Luczkowski

2024

Buildings

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Facing increasing sustainability demands, the construction industry is at a turning point where the implementation of circular economy (CE) strategies plays an essential role in driving the necessary transformation aimed at reducing the environmental impact. To facilitate this shift, structural engineering must effectively integrate circular principles into building design. With the exponential growth of research articles within this field, it is crucial to map the evolution of the research area. The objective of this study is to detail the trends with, challenges to, and research contributions, integration, and material applications of CE principles within structural engineering. Consequently, a systematic mapping of the CE within the field of structural engineering has been conducted in this study. Initially, the mapping process began with the identification of relevant keywords, followed by searches across four databases. Each resulting article was carefully screened against content criteria, culminating in 91 publications that were thoroughly evaluated. The publications were then categorized and analyzed based on attributes such as research type, circular design, materials, and applications. The results are presented through informative figures and tables. The analysis of the research indicates a predominant focus on technical solutions for structural systems, with demountable connections designed to facilitate the future reuse of materials representing more than half of the literature reviewed. A significant portion of the literature also addresses designing from reclaimed elements; these articles reflect a transformation in engineering approaches, incorporating computational design and innovative methodologies. The focus on steel as a structural material is prominent in the reviewed literature. However, there is an increasing focus on timber, which signals a definitive shift toward sustainable structural systems. Recurring challenges identified in the literature regarding the transition to a circular economy (CE) in the construction industry include the need for industry-wide adoption, precise standardization, the integration of digital tools, and the overcoming of related obstacles in policy and market acceptances. Furthermore, the literature demonstrates a significant research gap: the absence of a comprehensive digital framework enabling an effective digital circular structural design workflow.

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supporting

confidence: 87%

Section: Research Type and Circular Designmentioning

confidence: 99%

Section: Deconstructionmentioning

confidence: 99%

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Systematic Mapping of Circular Economy in Structural Engineering

Seeberg,

Haakonsen,

Luczkowski

2024

Buildings

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“…Such authentication can also be a game changer in circular economy solutions. While several solutions have been proposed for circular economy construction, 30 aiming at reusing concrete and steel components-costly and with a high environmental footprint-after a building's end of life, rather than turning them into rubble during simple demolition as is customary today, the industry is hesitant because no reliable solution is yet on the market that allows a buyer of the reused element to verify the exact quality and origin of the steel or concrete. By securing a serial number in the component with a CSR tag, such authentication would be possible, thus removing a significant barrier towards adoption of circular economy solutions.…”

Section: Supply Chain Track-and-trace and Circular Economy Solutionsmentioning

confidence: 99%

Cholesteric spherical reflectors as innovative optical elements with vast application potential

Lagerwall

2024

Emerging Liquid Crystal Technologies XIX

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Cholesteric Spherical Reflectors (CSRs) are omnidirectional selective retroreflectors enabled by the ability of cholesteric liquid crystals (CLCs) to self-assemble with helicoidally modulated long-range orientational order, turning them into a liquid chiral photonic crystal with one-dimensional periodicity. The liquid state allows us to easily mold the CLC into spherical units, with stabilizers in the surrounding liquid phases ensuring the appropriate boundary conditions. By varying the composition of the CLC we can continuously tune the wavelength band of retroreflection across the visible spectrum and into the ultraviolet (UV) as well as infrared (IR) regimes, choose whether the CRSs reflect right-or left-handed circular polarization, and we can make them polymerizable, such that the CSRs are easily turned into solids after annealing, allowing easy manipulation and incorporation into diverse matrices. This opens for numerous innovative applications, from anti-counterfeiting and supply chain track-and-trace solutions, via human-invisible signage optimized for robots and AR device wayfinding, to the pixelation of structural color for generating non-spectral colors without absorption or indiscriminate scattering, and even enhanced-sensitivity disease testing. In my talk, I will briefly introduce the concept of CSRs and highlight their salient features, and then I will focus on our on-going efforts to solve important societally and industrially relevant problems by taking advantage of the opportunities offered by CSRs.

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Unclonable human-invisible machine vision markers leveraging the omnidirectional chiral Bragg diffraction of cholesteric spherical reflectors

Agha

Geng

et al. 2022

Light Sci Appl

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The seemingly simple step of molding a cholesteric liquid crystal into spherical shape, yielding a Cholesteric Spherical Reflector (CSR), has profound optical consequences that open a range of opportunities for potentially transformative technologies. The chiral Bragg diffraction resulting from the helical self-assembly of cholesterics becomes omnidirectional in CSRs. This turns them into selective retroreflectors that are exceptionally easy to distinguish—regardless of background—by simple and low-cost machine vision, while at the same time they can be made largely imperceptible to human vision. This allows them to be distributed in human-populated environments, laid out in the form of QR-code-like markers that help robots and Augmented Reality (AR) devices to operate reliably, and to identify items in their surroundings. At the scale of individual CSRs, unpredictable features within each marker turn them into Physical Unclonable Functions (PUFs), of great value for secure authentication. Via the machines reading them, CSR markers can thus act as trustworthy yet unobtrusive links between the physical world (buildings, vehicles, packaging,…) and its digital twin computer representation. This opens opportunities to address pressing challenges in logistics and supply chain management, recycling and the circular economy, sustainable construction of the built environment, and many other fields of individual, societal and commercial importance.

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A Reusable Structural System Fit for Geometrical Standardisation and Serial Production

Cited by 3 publications

References 12 publications

Systematic Mapping of Circular Economy in Structural Engineering

Systematic Mapping of Circular Economy in Structural Engineering

Cholesteric spherical reflectors as innovative optical elements with vast application potential

Unclonable human-invisible machine vision markers leveraging the omnidirectional chiral Bragg diffraction of cholesteric spherical reflectors

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