Toni Kotnik's research while affiliated with Aalto University and other places

Publications (39)

Article
Full-text available
With increased interest in materials and construction in the architectural field, the use of building structure as the element of architectural expression has gained interest in recent years. In his analysis of contemporary Swiss architecture, Arthur Rüegg has coined the notion of ‘Strong Structures’ for the tendency to activate a load-bearing stru...
Chapter
This chapter discusses a reading of computational design, which no longer aims at sustainable design solutions that minimally impact the environment but rather at regenerative design solutions that actively support the natural environment and its future Affiliationids : Aff2, Correspondingaffiliationid : Aff2 Affiliationids : Aff3 development. It a...
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Taking Colin Rowe’s contextualism as a starting point, this chapter focuses on the changing relationship between the architectural intervention and the ground, as well as the dematerialization of this relationship through the abstraction of digitally mediated context. Such an abstraction supports the transfer of design methods between design discip...
Chapter
This chapter looks more closely at the process of contextual figuration through the lens of computational design thinking. This design thinking is characterized by the articulation of flexible relationships between entities, often denominated as topological diagrams. It is argued that these diagrams not only govern the use of the contextual data bu...
Article
This article presents a new approach to the design of freeform shells: smooth poly-hypar surface structures. As combinations of hyperbolic paraboloids (hypars), smooth poly-hypar surfaces are ruled locally while globally appearing to be continuous freeform. The double curvature of the individual hypar modules and the smooth connections (G1 degree)...
Article
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Structural art should not be marginalised as an integral part of structural design. By reviewing historical understandings of structural art, this article discusses the ambiguous and neglected perspective of structural art on architectural design and human perception dimensions, concentrating the attention of structural art on the question of human...
Article
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The analogy between the human body and architectural structures dates all the way back to ancient times and has significantly shaped the design of buildings and structures. The article examines the body's historical influence on how structures are perceived and designed , demonstrating how the body shapes the "technical truth" dimension of structur...
Conference Paper
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The paper attempts to provide a neuroscientific perspective on the discussion of structural expression. Taking human perception as the clue, this article starts with the notion of strong structures, take it as the base to review and analyses the principles of structural perception under the neurophysiological perspective. Based on the findings from...
Article
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Graphic statics, a vector-based approach to the construction of equilibrium, enables a design methodology at the intersection of structural thinking and architectural concept. The methodology is grounded in parametric and topological operations that allow for controlled distribution of tension and compression in space and with it the shaping of the...
Conference Paper
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The advancement of computational design and fabrication technologies has allowed combining physical and digital processes in architecture. Existing methods for physical-digital integration offer limited support for explorations with folded non-linear surfaces. This paper introduces a feedback-oriented design approach linking physical models with di...
Article
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Digital design is driven by a thinking in structures that emphasizes patterns of order and their interaction. The paper presents an introduction into such design thinking and emphasizes the exploration of organizational pattern in various level of abstraction and scale through the integration of computational methods and workflows. Using a speculat...
Conference Paper
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This paper presents intermediate results of an experimental research directed towards development of a method to use additive manufacturing technology as a generative agent in architectural design process. The primary technique is to variate speed of material deposition of a 3D printer in order to produce undetermined textural effects. These effect...
Presentation
So far, little effort has been put in the integration of aesthetic and conceptual design aspects directly into an optimal design of structures under engineering constraints. Towards this direction and in order to develop a more interactive approach that supports the user in achieving architectural solutions of high performance, a previous work prop...
Conference Paper
This paper describes the design, fabrication and assembly process of a medium scale demonstrator that was developed in the framework of the authors' research on Interlocking Particle Structures (IPS). The demonstrator not only served as proof of concept, but also as an exhibition booth during the 2017 Aalto Festival in Espoo, Finland. In addition t...
Conference Paper
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Stereotomy is generally known in architecture as a stone carving technique for the purpose of constructing masonry assemblies. A deeper analysis reveals stereotomic design processes' ability to resolve multiple structure and construction constrains, derived as underlying geometries and their relationships, into architectural volumetric complexities...
Conference Paper
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Stereotomy originated as a technique that accumulated theoretical and practical knowledge on stone material properties and construction. At its peak in the nineteenth century, by pushing the structure and construction limits, it gained the ability of using``using``the weight of the stone against itself by making it hover in space through the very w...
Conference Paper
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As double curved and double ruled surfaces, hyperbolic paraboloids (hypars) allow for a relatively easy construction method, meanwhile ensure free-bending structural behavior. Furthermore, from an architectural standpoint, through simple manipulations of four vertices of a hypar, it can varies into a wide range of forms to satisfy different archite...
Conference Paper
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With the rise of the digital in architecture and the availability of digital fabrication tools, the interest in the material aspect of the model has intensified. At the same time, the design space for exploration of material behavior and its design potential has been extended from the physical into the digital. This has resulted in a cyclic set of...
Conference Paper
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The Abeille flat vault, patented at the end of 17th century, consists of identical ashlars arranged in a woven-like pattern that generates their interlocking mutual support. In recent years, the availability of digital design and fabrication tools has caused new interest in the Abeille vault. Several studies investigate the interlocking principles...
Article
This paper presents an interactive framework for the design of truss structures with incorporation of the subjective influence of user feedback in the design process. In the devised framework, the truss chords are described using Non-Uniform Rational Basis Splines (NURBS), a representation typically used in computer aided design (CAD) for describin...
Book
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Mit „Form“ beschäftigen sich ganz unterschiedliche Disziplinen wie Literatur- und Sprachwissenschaften, Philosophie oder Biologie. Der Begriff steht dabei nicht nur für die Form eines Gegenstandes. In der Architektur bezeichnet Form vor allem die räumliche und strukturelle Qualität und ist damit ein zentraler Forschungsgegenstand. Die vorliegende U...
Conference Paper
This paper presents an interactive framework that balances visual exploration of design variations with their structural implications, in the case of the design of truss structures with aesthetic criteria. Based on the assumption that aesthetic design goals are not easily quantifiable, key elements for an interactive optimization framework are deri...
Article
Im 19. Jahrhundert wurden grafische Methoden – 1866 von Carl Culmann als “Graphische Statik” systematisiert und publiziert – dazu benutzt, den Zusammenhang zwischen geometrischer Form und innerem Kräftefluss genauer zu untersuchen. Diese Methoden wurden mehr und mehr durch analytische Verfahren ersetzt, da in den aufstrebenden Ingenieurwissenschaft...
Conference Paper
This paper presents an interactive framework for the design of truss structures with aesthetic criteria. The truss chords are described using NURBS, a tool widely used in computer aided design (CAD) programs to describe free-form geometry. This allows for a convenient interface between the optimization scheme, a particle swarm optimizer, and the us...
Chapter
This paper presents a novel approach for the interactive design of linear structures in space. A method is introduced, that provides a maximum of formal freedom in the design of funicular, hence efficient, structures. For a given deck geometry, defined by a design driving NURBS curve via parametric modeling techniques, a tailored relaxation routine...
Article
The Swiss engineer Heinz Isler (1926-2009) is regarded around the world as one of the pioneers of shell structures. In his specific interest in shell form two concepts were melded: Lardy’s concept of aesthetics and the universality of the natural laws. Out of this a form-oriented scientific organicism has emerged that, on one hand, coincides with t...
Conference Paper
This paper presents a concept for a novel typology of computational design tools which are able to bridge the gap between the intuitive "structural sketch" and sophisticated analysis software. Based on equilibrium solutions and graphic statics, a set of interactive parametric tools have been implemented as a prototype, within an existing computer-a...
Chapter
This paper describes a precise geometric method for the inscription of structural constraints into architectural form. Based on techniques from graphic statics, the force distribution in building structures is visualized using geometric diagrams. This diagrammatic representation allows a formal description that shows the relationship between the fo...
Article
In recent decades, new methodologies have emerged in architectural design that exploit the computer as a design tool. This has generated a varied set of digital skills and a new type of architectural knowledge. However, up to now, a theoretical framework is missing that would allow for a comprehensive pedagogical agenda for the teaching of digital...
Chapter
This paper describes a precise geometric method for the inscription of structural constraints into architectural form. Based on techniques from graphic statics, the force distribution in building structures is visualized using geometric diagrams. This diagrammatic representation allows a formal description that shows the relationship between the fo...
Article
Recent interest in freeform architecture has dramatically changed the type of surfaces under consideration, from statically optimized shell structures to shapes that have been determined by non-structural design decisions. Based on the theory of plasticity a new method has been developed which allows the design engineer to control the transfer of l...

Citations

... For instance, Hassanpour and Ş ahin (2021) argue that technological-instructional tactics, particularly a supplementary digital toolkit, induce students to reflexively approach instructional inputs and avoid mental shortcuts. Similar novel conceptual frameworks that incorporate technology into studio instruction to trigger improved creativity, design productivity and design exploration by idea generation have also variously been developed by Cindioglu et al. (2021) (mixed-reality framework for basic design), Fricker et al. (2020) (computational design as a means for thinking in interaction patterns across various scales) and Karada g and T€ uker (2022) (integration of ecology-based concepts into computational design thinking). ...
... Finally, the workflow of The Canopy shows that the pursuit of structural art is not about letting the structure's sound overshadow the building itself [34]. We can instead find an interdependent and solid balance between the two by utilizing the proper design medium and process [35,36]. Obviously, achieving this equilibrium requires multiple iterations of the design process instead of allowing the structure to realize the building's form in a "post-rationalization" manner. ...
... The final materialization of The Canopy demonstrated that all the design intentions, functional requirements, and site constraints were met. The thinking process behind this project reflects the interaction between form and force, creating a space of "Strong Structures" [33] through a synergy of structure, construction, and tectonic aspects with an extremely lightweight and minimal intervention. The Canopy ultimately succeeded in providing an attractively proportioned and functionally partitioned temporary space for the conference, always respecting the existing space in which it was immersed. ...
... Westerlind [20] used computational design methods for the programmed placement of the filament in space to produce intricate porous choreographed concrete compositions. Alothman et al. [21], and Mohite and Kotnik [22] generated emergent patterns by manipulating the print path, controlling the geometry and the motion speed, in small scale semifluid material extrusion. Efthimiou and Grasser [23] implemented an agent-based path planning and printing simulation to control the 3DCP process and minimum printable distance between neighbouring geometries. ...
... Straight line folding transfigures the sheet into a polyhedral surface with a sudden change in surface direction; by contrast, the curved folding, generically called "free forms", turns the sheet into a smooth curved surface with the gradual change in direction, obtaining unconventional complex three-dimensional modern spatial forms by the hybrid deformation [4]. In this form, the thin sheet gains strength and becomes more resistant to deformation [5]. ...
... Given the performance and material savings gains enabled by Topology Optimisation (TO) [2,5-9] the promising results offered by structural optimisation in the field [10][11][12][13][14][15] and for complex problems [16,17], as well as the advances for manufacturing of topologically optimised parts [10,[18][19][20] it can be regarded as surprising that those approaches and techniques are not more widespread in the Civil Engineering industry and, mainly, in steel connections design [2,8,21]. ...
... This interlocking system relies on friction, without the need for additional fixtures, resulting in a self-supported system. Here, the configuration options are limited because the slots are located only along the [29]. It consists of six plywood panels that are connected on an orthogonal spatial pattern. ...
... An approach to the design of freeform surfaces as combinations of hyparssmooth poly-hypar surfaces, also referred to as hyperbolic nets [25]or A-nets [24], -has been recently introduced from a structural perspective [12,13,11]. While in the existing precedents, hypars are generally joined through folds that work as stiffening beams, leading to bending actions at the edges [3,7,35,31,36,38,37,19], in the smooth poly-hypar surfaces, different hypars are combined smoothly. ...
... As a result, designers often miss the opportunity to incorporate intricate material behaviours that can only emerge through a physical process like in craft [Malafouris 2008]. Instead of starting with a pre-determined design idea, the material-driven digital fabrication seeks inspiration from material behaviour by altering machine and/or 3D-model parameters [Corsini et al. 2018;Gürsoy 2018;Mohite et al. 2018;Zboinska and Dumitrescu 2020]. Even though the aspect of material exploration resembles craft, the fabrication process is not as 'continuous' as craft, because of 'turn-taking' between physical fabrication and fine-tuning of 3D-model or [Peng et al. 2018;Zoran and Paradiso 2013]. ...
... Nevertheless, in the last decade, advances in computer simulation and digital fabrication techniques have attracted a new wave of research on this topic. With each new research approach introduced, the specific material constraint has been progressively detached from stereotomy, allowing the term be perceived more as a generative system: a collection of form and structure relations which follow a clear set of principles and parameters (Castellón and D'Acunto 2016;Tellia 2018;Vella and Kotnik 2017). ...