Structural form finding using zero-length springs with dynamic mass

John Harding, Paul Shepherd

Research output: Contribution to conferencePaper

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.
Original languageEnglish
Number of pages8
Publication statusPublished - 20 Sep 2011
Event2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter - London, UK United Kingdom
Duration: 20 Sep 201123 Sep 2011

Conference

Conference2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter
CountryUK United Kingdom
CityLondon
Period20/09/1123/09/11

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Bending moments
Damping
Geometry

Cite this

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

Structural form finding using zero-length springs with dynamic mass. / Harding, John; Shepherd, Paul.

2011. Paper presented at 2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter, London, UK United Kingdom.

Research output: Contribution to conferencePaper

Harding, J & Shepherd, P 2011, 'Structural form finding using zero-length springs with dynamic mass' Paper presented at 2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter, London, UK United Kingdom, 20/09/11 - 23/09/11, .
Harding J, Shepherd P. Structural form finding using zero-length springs with dynamic mass. 2011. Paper presented at 2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter, London, UK United Kingdom.
Harding, John ; Shepherd, Paul. / Structural form finding using zero-length springs with dynamic mass. Paper presented at 2011 IASS Annual Symposium: IABSE-IASS 2011: Taller, Longer, Lighter, London, UK United Kingdom.8 p.
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