The CAD-Tool 2.0 Morphological Scheme of Non-Orthogonal High-Rises
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ctbuh.org/papers Title: The CAD-Tool 2.0 Morphological Scheme of Non-Orthogonal High-Rises Author: Karel Vollers, Researcher, Delft University of Technology Subject: Architectural/Design Keywords: Form Technology Publication Date: 2009 Original Publication: CTBUH Journal, 2009 Issue III Paper Type: 1. Book chapter/Part chapter 2. Journal paper 3. Conference proceeding 4. Unpublished conference paper 5. Magazine article 6. Unpublished © Council on Tall Buildings and Urban Habitat / Karel Vollers The CAD-tool 2.0 morphological scheme of non-orthogonal high-rises "In consequence, twisted geometries with repetition of elements are applied not so much for economic gain as for semiotic connotation." Dr. Karel Vollers Non-orthogonal high-rise buildings are emerging with an increasing degree of geometrical Author variation. As yet no scheme categorises data on the basis of the overall geometries of such Dr. Karel Vollers, Researcher, Delft University of Technology buildings. This paper proposes an easily accessible morphological scheme which, for example, enables data to be retrieved on the sustainable performance of the distinctive building shapes. Delft University of Technology, Faculty of Architecture, Chair of Product Development The shaping of most non-orthogonal high-rises is related to developments in modeling Julianalaan 134 2628 GA Delft, The Netherlands software. The morphological scheme is based on software manipulations to describe shaping, t: +31 (0)20 616 8631 not on mathematical formulae. As software develops, new ways of generating shapes emerge. e: [email protected] In consequence the shaping scheme gradually will be updated. The scheme is illustrated by examples of overall shaping and materialization trends. Dr. Karel Vollers In the 1980s, as project leader for various architects (Gerssen, Kas Oosterhuis), Mr. Vollers worked on offices, hospitals and low-energy ultra-light housing. In the Non-orthogonal high-rises usefulness. Additionally, these techniques are 1990s he worked for UN-Studio on the 300m span in this context put to the test, as towers that Erasmus bridge in Rotterdam. Iconic buildings express regional or national truly earn iconic status have the potential to A visit in 1986 to works of the Brazilian architect Oscar identity. They symbolise power and ambition. Niemeyer ignited a great interest in the architectural This built identity, created by mankind, is stand well beyond the design lifetime of application of free curvatures. Dr. Vollers foresaw that modern buildings, underscoring the need for computers would stimulate their usage in the highly valued and of major importance in industrialized world. In 2001 his commitment to construction quality that yields durability and systemized buildings resulted in a PhD cum laude at global communication. Delft University of Technology on the thesis ‘Twist & longevity. The growing market of Build, creating non-orthogonal architecture’. To design outstanding buildings, architects non-standard, curved products stimulates He received the 2005 Dutch Aluminum Award, for the move away from the standard. Shapes of application of strong curvatures. Iconic first industrial framing system for freely curved façades. simple geometry are increasingly varied to add The AA 100 Q Twist framing system, also featuring articulated buildings, in the mid-rise range of operable windows, was developed with Alcoa expression. Designers get accustomed to 60-100m, have started to fill the gap between Architectural systems, Van Campen Bending and applying complex geometries, and refine the Tetterode Glas Voorthuizen. slightly curved high-rises and strongly curved shaping. low-rise buildings. With PhD graduate Daan Rietbergen he now develops adjustable moulds for glass and concrete panels. The sustainability credentials of high-rises is questionable, but for political, cultural and Morphological scheme for high-rises socio-economic reasons, they are built in large numbers, as boxes and as curved volumes. Integration of digital technologies into the Curved volumes offer numerous potential various stages of building development is advantages to designers and developers. A resulting in a variety of high-rise volumes with deviation from conventional high-rise shapes, curving façades. Their geometrical complexity which are generally extruded along their entire is increasing rapidly, and by implication the length or in broad segments, allows for greater complexity of materialising. An easily story-by-story customization of floor plate accessible database, that distinguishes geometry to its intended use. according to the overall shaping, will be useful when optimising build-up and performance of Large construction budgets often appro- high-rises with curved façades. The author priated for iconic projects in particular offer found no database nor morphological system opportunities to experiment with new and matching the geometrical variety. innovative design techniques, and can result in published data and insight which reduces the Mathematical descriptions that qualify façade risk of implementing these techniques in other surfaces as being anti-clastic/synclastic, projects, subsequently improving their single- or double-curved, do not describe 38 | Non-orthogonal high-rise buildings CTBUH Journal | 2009 Issue III ...tall timber overall building shapes. Mathematical etc. The relative ease definitions of curved surfaces like hyperbo- by which one can We’d been looking for ways in which we loids, conoids, etc. are too difficult for most design allows rapid building participants to understand and do shape development could“ replace concrete and steel construction not sufficiently reflect the variations in building and quick generation wherever possible in an effort to reduce carbon shapes. of digital data on dioxide emissions and reliance on fossil fuels. A topology classification system designed by components. The ” architects is described in Phylogenesis (FOA, parameters can be Andrew Waugh, director of Waugh Thistleton Architects, which teamed with structural engineer Techniker Ltd to design the world’s tallest residential 2003). It schematises surfaces - not building manipulated numeri- structure constructed entirely of timber and one of the tallest all-wood shapes. The scheme requires too much study cally, and by adjusting structures on the planet. From “Big Timber Hits London” Building Design to be generally used in the building industry. points on the screen operated by mouse- and Construction, June 2009 In his book ‘Skyscrapers-Skycities’ (JEN, 1980), clicks. Charles Jencks classifies by form and expression. A grouping by metaphorical In the first generation of non-orthogonal of their superstructure. Growing use of other equation (in skypricker, skyscraper or skycity) is building shapes, volumes were mostly geometries inspired the classification of more elaborated with ambiguous and subjective geometrically described by manipulating high-rise shapes. To avoid ambiguity, the names. He also lists the topics Morphology, straight lines or flat surfaces using the CAD-tool 2.0 morphological scheme, as the Articulation of surface, Style, Activity, commands Copy, Move and Rotate (VOL, new version is named by this author, only Technology, and Motivation. Only the 2001). The process to describe non-orthogonal distinguishes volumetric geometries. Morphology section deals with geometric volumes involves handling large quantities of descriptions. It subdivides into Central, data. Information exchange by graphics Longitudinal and Compound buildings. In the second generation of non-orthogonal The scheme is based on the observation that The section Longitudinal classifies high-rises as building volumes, solid modeling software most high-rise geometries are primitive a slab, stepped-, curved-, shaped-, amorpheus- was applied. In such software, shapes are shapes, transformed by a limited number of or complex slab. It covers high-rise shapes in described by relations between their manipulations. Mainly because of esthetics general, but does not determine variations in composing elements. Scripting and parametric and building economy, the number of buildings with curved façades. modeling procedures greatly eased drawing parameters used, generally, is less than 4. As an procedures and processing of data. Control of Up-to-date high-rise project information is example, most twisted tower designs are freely curved surfaces built of, for example, generated by scaling a cube into proportion, available on the CTBUH website NURB curves is maintained by manipulating www.ctbuh.org. Its database classifies and then twisting the volume. Most people only a small number of points. In solid can easily mentally visualise subsequent according to geographical location, height, modelling software, volumes can be trans- usage, etc. not to geometrical shape. transformations. Computer commands thus formed by commands like Shear, Twist, Scale, replaced mathematical formulae to indicate The morphological scheme proposed by the Unite or Merge. the form build-up. Manipulations may be author deals with the overall shaping of The third generation of non-orthogonal depicted by icons and these may be supple- volumes with curved façades. Compound high-rises reflects the use of the before- mented with numerical information. Such buildings, i.e. those consisting of segments of mentioned tools, but a sequence of their use is representation resembles the way software different geometry types, are only briefly hard to distinguish. By