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This paper presents a new concept for retractable roof structures. The new structures consist of a foldable lattice of beams connected by cylindrical joints, to which covering panels or membranes are attached. These structures fold towards their perimeter and there is practically no limit to their shape. Solutions to the key problems that have to be solved in the course of the kinematic design of this new type of structure are presented, including two different ways of connecting them to fixed foundation points while maintaining their internal degree of mobility, and how to determine the shapes of the covering panels to avoid interference during retraction. |
