Today we were able to construct our first successful cable guided fabric formed origami pattern. The structure is a modified barrel vault that possesses load bearing (spanning) capacities and also seeks a transition from a larger scaled opening at the front to a smaller opening at the back. This will help with fitting the structure underneath the sloping cable net above. As can be seen here, we have decided to forego the cable guided valleys as sharp transitions for a gravity induced sag which produces a catenary curved section in the valleys which will (in theory) give us a form capable of transferring load paths more efficiently in each diamond shaped “beam” spanning from node to node. Once iced, these beams will become the units that construct the spanning arches over the interior.
Using optimal stress flow patterns developed by Caitlin Mueller and her team at MIT we tested a new cable pattern linking three main anchor points on the site (two areas along the shoreline and the lighthouse). By distributing the loads of the fabric structures between these three areas this cable pattern allows us to distribute the load evenly along the cables, achieve enough stiffness in the cable net to pull up to with sufficient tension, as well as create lateral stiffness (from the horizontal funicular outer most boundary cables) to be able to pull at angles down to the ice. This video shows a time lapse of us constructing the cable that onto our 1:10 physical model.