Asymptotic building envelope: Combining the benefits of asymptotic and principal curvature layouts

Abstract

This paper presents current research on low-cost, high-performance doubly curved building envelopes that benefit from a curvilinear layout along an isothermal web on minimal surfaces. We investigate the geometric symbiosis of an elastic lamella mullion system that follows the asymptotic curves combined with panelization strategies along the principal curvature lines in order to simplify fabrication and enhance the structural performance. We present a digital and physical setup of a full-scale prototypical asymptotic facade substructure. In collaboration with the construction industry, we evaluate the complete design and construction process, including digital modeling, fabrication planning, computer-aided manufacturing and logistics, prefabrication, and assembly. Both digital and physical prototypes are used to investigate cladding solutions. Our studies are specifically looking at developable-elastic and planar-rigid tessellations, which utilize a principal curvature layout. We conclude by highlighting flat-sheet fabrication, high structural resilience, and assembly time and tolerances, as primary potentials and challenges of this design strategy.