The Design of a Planar Kinetic Reciprocal Frame

In this paper is presented the project of a high-tech planar Kinetic Reciprocal Frames. Reciprocal frame structures are based on the geometric configurations studied in the past by Leonardo da Vinci. These structures, particularly interesting for their potential in architectural applications, features kinematic properties which differs from the more common pin-joint assemblies, because bars joins not only in the end but also in intermediate points. While recent applications in architecture seem to emphasize the simplicity and the naiveness of this kind of construction, trough timber construction, for instance, we are firmly convinced that RF can be of interest when approached in more technological way. Our research is then specifically oriented to Kinetic Reciprocal Frames (KRF), in which a high tech construction can improve consistently the performances, allowing the design of innovative structures. Kinetic structures as KRF can be a powerful design solution for example to meet the complex requirements of time-depending performances in green buildings like the light control in roofs and facades. The project presented is the result of two distinct but intertwined phases: the analytical phase, dedicated to the definition of the problem from the mathematical point of view; and the prototyping phase, dedicated to the validation and extension of the analysis with the use of physical models.