Structural form finding using zero-length springs with dynamic mass

Harding, John; Shepherd, Paul

Abstract

This paper describes a new method for the form-finding of funicular structures in two or three dimensions using a zero-length spring system with dynamic nodal masses. The resulting found geometry consists of purely axial forces under self-weight, with zero bending moment at nodes for both shells and tension net forms. The advantages of this method over known approaches are discussed, with an application on a recent live project also described. A real-time solver using semi-implicit Euler integration with viscous damping is used to achieve system equilibrium. By using a real-time solver, the designer is able to alter the gravitational field or apply new point loads without re-starting the analysis, leading to a interactive experience in generating design options. The successful application of the method on a recent project is also discussed.

Citation

Harding, J., & Shepherd, P. Structural form finding using zero-length springs with dynamic mass. Paper presented at 2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter

• Presentation Conference Type: Conference Paper (unpublished)
• Conference Name: 2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter
• Publication Date: Sep 1, 2011
• Journal: 2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter
• Peer Reviewed: Peer Reviewed
• Public URL: https://uwe-repository.worktribe.com/output/959723
• Publisher URL: http://www.iass-structures.org/index.cfm/events.details?eventID=149
• Additional Information: Title of Conference or Conference Proceedings : 2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter