Total views : 321
The Performance of Half-Cuboctahedron Grid Tensegrity Systems in Roof Structures
Background/Objectives: Sustainability in the use of material and economy are the watchwords of the modern engineering fraternity. Many structural systems have been evolved for this purpose. At present, the qualities of the tensegrity structures, which make the technology attractive for human use, are their resilience and ability to use the material in a very economical way. Thus, the construction of the structures using tensegrity principle will make them highly resilient and reasonably economical at the same time. Methods: Though a lot of research has been carried out on the behaviour of tensegrity systems, the area requires further research for a complete understanding. Hence, this project is aimed at analysis of a tensegrity based roof structure. The prototype module used is half-cuboctahedron. Findings: First, a single module measuring 1 m x 1 m in size, is modelled and analysed using an FEM based software. The investigations are then extended to a 2 x 2 grid, measuring 2 m x 2 m in size. The behavior of the grid is studied under the application of external loads varying the prestressing forces on the members. Later, a 4 x 4 grid, measuring 4 m x 4 m in size and an 8 x 8 grid, measuring 8 m x 8 m in size are modelled and analysed based on the 2 x 2 grid system. From the analysis, it is found that the displacements of the system satisfy the permissible limits as per previous research values. The member forces have also been analysed. Applications/Improvements: The performance of the half-cuboctahedron tensegrity grid structure proves to be more suitable for larger span structures.
Displacements, Half-Cuboctahedron, Hexagonal, Tensegrity.
- Prakash A. Project report on tensegrity based tower structures: Indian Institute of Technology, Delhi; 2007.
- Pugh A. An introduction to tensegrity: University of California Press Berkley, USA; 1976.
- Narayanan S. Space structures: Principles and practice. 2007; 2.
- Hanaor A, Liao MK. Double-layer tensegrity grids: Static load response I: Analytical study. Journal of Structural Engineering. 1991; 117:1660–74.
- Stern IP. Thesis on development of design equations for self-deployable N- strut tensegrity systems, University of Florida, USA; 1999.
- Tibert G. Deployable tensegrity structures for space applications: Royal Institute of Technology, Doctoral Thesis, Stockholm; 2002.
- Jannegui VG. Tensegrity structures and their applications to architecture, Queen’s University, Belfast; 2007.
- Zhou Y. General methods for creating tensegrity towers, arches, bridges and roofs. RMIT University; 2007.
- Panigrahi R, Gupta A, Bhalla S. Dismountable steel tensegrity grids as alternate roof structures. Steel and Composite Structures. 2009; 9(3):239–53.
- Panigrahi R. Development, analysis and monitoring of dismountable tensegrity structure. Doctoral Thesis, Indian Institute of Technology, Delhi; 2007.
- IS 1239-Part 1. Indian Standard, Steel Tubes, Tubulars and Other Wrought Steel Fittings- Specification; 2004.
- IS 3459. Indian Standard, Small Wire Ropes- Specification; 2004.
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution 3.0 License.