ResumoO objetivo é apresentar o processo de produção de uma estrutura com geometria não convencional, baseado na interoperabilidade de recursos digitais para o projeto e fabricação dos elementos, bem como na interoperabilidade cultural que promove o trabalho integrado entre os agentes do processo. Os principais desafios do processo estão associados às especificidades programáticas, somadas ao prazo de construção de 120 dias. Trata-se da produção de um viveiro de borboletas dedicado à exposição interativa com objetivos didáticos e aberta ao público. A implantação em área interna de edificação tombada exigiu cuidadosa intervenção no espaço. A cúpula geodésica tem 13,75m de diâmetro, 10,60 m de altura, é composta por 145 elementos de geometria triangular conformados em chapa de aço dobrada. Com superfície de 561 m 2 e 5,93 kg/m 2 , a estrutura tem volume útil de 1.056m 3 . O sistema de vedação foi projetado para viabilizar a visitação pública e atividades de manutenção do viveiro. A apresentação do processo compreende princípios do projeto estrutural, requisitos funcionais e estéticos, método de montagem, fabricação e controle da qualidade dos elementos. A interoperabilidade permitiu a construção do objeto no prazo estabelecido. Não foi necessária a produção de protótipos físicos para validação das soluções de projeto. Palavras-chave:Interoperabilidade. Produção digital. Cúpula geodésica. AbstractThis paper aims to present a production process of a non-conventional structure, based on the interoperability of digital modelling tools focused on design and fabrication of building components, as well as the cultural interoperability that promotes the integrated work among stakeholders. The major challenges are related to the architectural programming and to the relatively short period of time (120 days) set out for completion of the construction works. It deals with the construction of a butterfly vivarium, oriented to educational purposes and accessible to public in general. Besides, the location area is inside a listed building demanding careful intervention in space. A geodesic structure was designed measuring 13.75 m in diameter, 10.60 m in height and consisting of 145 triangular shaped components, made from cold-formed sheet steel members. The surface area, surface mass and enclosed volume are, respectively, 561 m . Cladding was designed to enable the public access and appropriate conditions for maintenance. The process comprises: principles of structural design, functional and aesthetic requirements, assembly method, manufacturing and quality control of components. The interoperability allowed the completion of the construction works on schedule. There was no need of physical prototypes for validation of the design solutions.
Physical models (mock-ups and prototypes) are usually employed during design and development phases of prefab homes in order to assess the performance of the components during assembly phase.These are typical examples of craft developed on the margins of industrial processes.The building industry, regardless of level of industrialization, actually does not have shown preference in using manufacturing software for design development; many companies prefer two-dimensional CAD software or BIM system-based software. In this context, the aim of this dissertation is to demonstrate how the use of manufacturing software contributes to the efficiency of digital prototyping in the production of prefab homes. Four systems of an energy-efficient prefab home were analyzed: structure, portable vertical coatings, roof panels with magnetic attachment devices and transparent guardrails. The design of these systems were developed using manufacturing software whose interoperability with CNC machines was crucial to the achievement of the project´s goals. The assessment of the assembly process of the systems was made by means of manufacturing software using digital components modeled as from the shape of the designed components and of the physical characteristics of materials.Assembly simulations were made by using digital prototyping, avoiding expensive and time-consuming processes of producing and assessment physicalmodels.As a result a team of 20 students, not specialized in the production of buildings, have assembled an energy efficient house, with floor area of 45 m 2 , in 150 hours, during an international competition among universities held in Madrid, September 2012. Application of the method was possible due to the valuation of the team work during the design phase, when the main decisions concerning production were taken. The correct use of digital prototyping resources enables users to try reliable scenarios and ensure safety conditions during production.
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