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Cold formed steel members are widely applied in light roofing systems, mainly with trussed structural solutions. Developed from thin steel sheets (usually of around one millimeter thickness) stiffened trapezoidal CFS can be considered as an alternative for large span roofing, allowing the assembling of an orthotropic roofing system. In order to improve its flexural buckling behavior, these thin-walled sections must be designed with intermediate stiffeners and quite large possibilities can be achieved in order to (i) improve the cross-section strength under bending moment, (ii) simplify and improve the stiffeners arrangement, (iii) maximize the roof covering width, (iv) develop the roofing system for long span bridging and (v) design with as thin as possible steel sheets. Considering all these conditions, the general cross-section shape can be infinitively modified adopting different stiffener geometries, dimensions, distribution, as well as combining distinct stiffeners along the cross-section. Rational systematic choices and buckling results allowed identifying the “best” solutions, taking advantage of the shape grammar contribution combined with finite strip method buckling analysis. The obtained results revealed the key geometric parameters that must be considered to perform effective improvement of roofing trapezoidal CFS.

The current work presents an original parameterized wood frame system, a computational simulation of its structural performance and preliminary results of its digital fabrication and assemblage process. The project follows the concept of integration between CAD, CAE and CAM systems, aiming at the automation of the processes that make mass customization of social housing in Brazil practicable.

Este artigo descreve uma disciplina de ateliê do 9º semestre do curso de Arquitetura e Urbanismo da Universidade Estadual de Campinas – Unicamp – em que foi adotada uma estratégia de projeto paramétrico e baseado em desempenho para o desenvolvimento de edifícios altos. A disciplina envolveu o uso de programas de análise ambiental e estrutural, além da modelagem paramétrica e algorítmica como maneira de incorporar os resultados dessas análises à geração da forma, com base no desempenho. Além disso, a disciplina fez um uso intensivo de equipamentos de fabricação digital para a produção de maquetes. Os resultados obtidos demonstram a importância da presença de uma equipe interdisciplinar de instrutores no ateliê de projeto, além da viabilidade de se reproduzir, ainda que de maneira simplificada, o processo de projeto integrado, com o uso de tecnologias CAD/CAE/CAM, que vem se tornando cada vez mais presente nos escritórios de arquitetura.