From April 20th to the 29th, we will exhibit a scale model of constant stress arches constructed from voussoirs (building blocks) that are 3D printed using binder jetting technology. The exhibit, “Stereotomy 2.0 and Digital Construction Tools”, is co-edited by Giuseppe Fallacara and Christian Pongratz with the New York Institute of Technology, to be held at Par Excellence, New York. The event includes a workshop and symposium. The exhibition boasts an amazing line-up, including entries from Zaha Hadid CoDe, P.ART and AKT II, the Block Research Group, and so on!
The arches and their method of construction are a proposal by Maurizio Barberio and Micaela Colella of Barberio Colella ARC and the New Fundamentals Research Group, Polytechnic University of Bari, in collaboration with Summum Engineering. Material properties are based on the 3D printing technology provided by Concr3de. Each voussoir is topologically optimized to achieve a volume fraction specific to its position in the arch, in order to achieve constant stress. The entire arch is prestressed by a central tendon, to deal with live loads, and allowing the assembly and disassembly of the arch. The prestress disturbs the stress state for a conventional constant stress arch, requiring its shape to be reassessed. Summum Engineering determined the shape of the arches and volume fraction of the voussoirs to achieve constant stress, as well as the amount of prestress to keep them in compression under external load.