A DISCUSSION ON THE STIFFNESS MATRICES USED IN TENSEGRITY STRUCTURES

Luisa María Gil-Martin; Manuel Alejandro Fernandez-Ruiz; Enrique Hernandez-Montes

doi:10.5937/jaes15-14766

Luisa María Gil-Martin University of Granada (UGR).Campus Universitario de Fuentenueva s/n. 18072 Granada, Spain
Manuel Alejandro Fernandez-Ruiz University of Granada (UGR).Campus Universitario de Fuentenueva s/n. 18072 Granada, Spain
Enrique Hernandez-Montes University of Granada (UGR).Campus Universitario de Fuentenueva s/n. 18072 Granada, Spain

DOI: https://doi.org/10.5937/jaes15-14766

Abstract

The expression stiffness matrices used in the study of tensegrity structures has inherited a formulation initially conceived for the shape finding problems of tension structures. Nevertheless stiffness and geometrical stiffness matrices are well known concepts of structural analysis and all the formulations which are used need to be congruent. In this paper, we present a formal discussion about the formulations used in several publications showing that they are not equivalent. A classic example is presented, which has been solved using several expressions available in the relevant literature, the results have been compared with a classical finite element software, showing the discrepancies.