Log In    |    Join IASS    |    Online Journal    |    Proceedings    |    Directory    |    Events    |    News

On-line Journal of the IASS

Vol. 46 (2005) No. 3 December n. 149


Form-Finding of Self-Stressed Structures by an Extended Force Density Method

< Table of Contents for Vol. 46 (2005) No. 3 December n. 149
  • Journal Name: Journal of the International Association for Shell and Spatial Structures (J. IASS)
  • ISSN: (Electronic Version) 1996-9015
  • ISSN: (Print Version) 1028-365X
  • Issue: Vol. 46 (2005) No. 3 December n. 149
  • Pages: 159-166
  • Title: Form-Finding of Self-Stressed Structures by an Extended Force Density Method
  • Author(s): J. Zhang and M. Ohsaki
  • Keywords: Self-stressed structure, form-finding, force density method, singular value decomposition.
Abstract
A numerical method for the form-finding problem of self-stressed structures is presented as an extension of the basic idea and formulations of the force density method, which is initially developed for cable nets. Singular value decomposition of the equilibrium matrix with respect to nodal coordinates is utilized to find the feasible set of force densities for satisfying the non-degeneracy condition of the structure. A unique configuration of the structure can be obtained by specifying an independent set of nodal coordinates. The proposed method can have some, although not exact or direct, controls over the geometrical and mechanical properties of the structure. Its strong ability of searching new configurations and the good convergence properties are demonstrated by several numerical examples.

Read the complete article (pdf) (requires membership or subscription)
© IASS All rights reserved.
IASS · CEDEX - Laboratorio Central de Estructuras y Materiales · C/ Alfonso XII, 3 · 28014 Madrid, Spain     tel. 34 91 335-7409; fax: 335-7422
Site Design & Programming
by World Design Group, Inc.