Replication Data for: Experimental testing of a tensegrity simplex: self-stress implementation and static loading

Abstract

This dataset gathers all the experimental and numerical results of a tensegrity simplex subjected to the self-stress implementation and to static loading. The abstract of the corresponding paper is given below: Tensegrity structures are pin-jointed systems composed of struts in compression surrounded by prestressed cables. Their particular appearance and mechanical properties have not ceased to amaze architects, scientists, and engineers. These peculiar strut/cable structures are defined by the existence of a self-stress state which provides stability and determines the behavior of the system under loading. Many studies have focused on the form finding of tensegrity systems through the analytical and/or numerical calculations of their self-stress. However, few studies have focused on how a self-stress state can be practically implemented in such a system. This paper focuses on the self-stress implementation in tensegrity structures through experimental testing of a human-scale tensegrity simplex model. The impact of self-stress was assessed through measurements in element forces combined with measurements of the complete geometry, i.e. the vertical position of the nodes (height) and the angles of rotation. Moreover, experimental results are compared to the theoretical self-stress state obtained by singular value decomposition of the equilibrium matrix and to numerical simulations using the dynamic relaxation method. It is shown that the self-stress state in the simplex can be obtained by imposing elongations to any element or combination of elements with internal forces following the same linear trend. However, depending on the selected element combination, the geometry of the structure can be significantly impacted. Furthermore, the behavior of the model under loading depends on the prestress level and is found to be nonlinear. The complete characterization of the self-stress is thus critical for the construction and application of tensegrity structures.