Reciprocal Frames in Temporary Structures: An Aesthetical and Parametric Investigation

Abstract

This paper deals with the use of reciprocal frames in temporary gridshell structures, such as architectural pavilions in expositions and installations. These architectural examples can benefit from the use of short, easy to handle, generally joint-free, and repeatable â\u80\u9cmodulesâ\u80\u9d in order to create particular self-supporting structures. The lightweight and interwoven grid obtained by connecting short elements according to the reciprocity principle is structurally efficient and, at the same time, aesthetically pleasing, mainly due to the resulting tessellation. The paper firstly investigates the connection between efficiency and aesthetics. The last part of the paper investigates some temporary architectural pavilions from both an aesthetical and parametric point of view. In order to deepen our understanding of these structures, they are re-modelled according to a bottom-up approach by means of a constraint-based parametric CAD modeller. In this way, a reciprocal frame can be explored and modified by the parametric arrangement of its generative elements, which, like a natural organism, grows in self-generating forms

Wooden Structures within the Context of Parametric Design: Pavilions and Seatings in Urban Landscape

“…OSL: Oriented strand lumber, LSL: Laminated strand lumber, CLT: Cross-laminated timber Figure 16. (a-c) Compressed laminated bamboo, Forest Park Pavilion, 2007, St. Louis, Missouri, USA [39] Figure 15. (a-e) Floor plan and section, made by plywood panels pavilions: Swoosh pavilion, Bedford Square, London, Valeria García Abarca, Charles Walker (professor), and Martin Self (professor, 154m 2 ); [34] General, exterior and interior structure, ICD/ITKE Research Pavilion 2010, Inst.…”

Constructive system of reciprocal frames in terms of contemporary architecture

“…When it comes to combining elements, RF structures have been used for different types of modules and compound shapes which are made of several interlaced and single units (see Fig. 1) [6] [7]. Their definition gives us possibility and freedom in making custom shapes by only assembling basic elements into proper structure.…”

“…These curve changes arise from the various final disposition of the elements in each unit and, furthermore, by using uneven distances when connecting with the elements themselves, as in [16]. The five bundled steel pillars support the structure (Figure 6a) [6].…”

Disassembly Sequence Planning (DSP) Applied to a Gear Box: Comparison between Two Literature Studies

“…Level of accessibility (range: 1-2): a high score corresponds to an accessibility to the difficult piece; • Use of force (manual)(range: 0-3): in this case the score is directly proportional; • Placement (range: 1-2): the score increases with the degree of precision required; • Use of tools (range: 0-1): ideally one tries to design mechanisms that do not require the use of force or tools for disassembly, but in practice it is necessary to consider their use; • Structural characteristics (range: 0.8-3.5) of the components such as weight, shape and size; • Repetition of the parts (range: 0-5): the errors of evaluation are reduced if the repetitions are limited so that the operator recognizes the elements more simply; • Recognizability (range: 0-5) of the connection organs: ease of access to the connection elements is fundamental; • Time base (range: 0-5): the time required by the operator for certain movements that make up the operation to be performed must be quantified and optimized [29,30].…”