International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
A Review on Properties of Tensegrity Tower as an alternative for Conventional Steel Towers Ashish Srivastava1, Tabish Izhar2 1M.Tech
Student, Structural Engineering, Integral University, Lucknow, Uttar Pradesh, India professor, Department of Civil Engineering, Integral University, Lucknow, Uttar Pradesh, India ---------------------------------------------------------------------***--------------------------------------------------------------------2Assistant
Abstract - Since taller-and longer span power
rather easy a compression element and a tension element the way in which they are installed in a total, stable framework is in no way, shape or form self-evident. It is additionally not instinctively evident how a tensegrity framework transfers loads. This stands in checked differentiation to such structures where the instrument of the heap exchange can be, promptly grasped by even small children.
transmission towers are as of late being built in India, Electrical transmission towers have a tendency to be affected by the wind, seismic and other horizontal and vertical forces. Electrical transmission towers are associated with electrical cables, which indicate geometrically nonlinear conduct and have numerous haphazard vibration modes whose frequencies are regularly close. Besides, it has been demonstrated that the qualities of wind-incited vibration of a power transmission tower are firmly influenced by the behavior of the electrical cables. Thus to overcome such situations new techniques and method should be applied. Tensegrity is as such technique that shows better flexibility to the wind action. This paper reviews the form finding and other properties of tensegrity structures that makes it more useful for electrical transmission of heavy lines for longer span length.
Maybe in light of these theoretical troubles, advance in the procurement of tensegrity structures has been somewhat slow. Aside from the tower, until as of late the one remarkable field of utilization was the tensegrity dome, various that are in existence such as "The Bird's nest" in china. In what manner can these gatherings be steady, since their heaviest components appear to coast in space and their lightest components seem to escape the eyes. The appropriate response lies with the thirty-meter high mast of Kenneth Snelson's popularly known as Needle Tower. From a geometrical perspective, the increase of cells with indistinguishable composition (but of different size), organized the framework around a vertical pivot which in terms provide the stability to the structure and the compression member seems to be floating in the air while the lightweight strands provides the continuity which helps in attaining the state o self-equilibrium. The best way to understand the principle through which the structure attains self-equilibrium is to build a small model. It helps in understanding the method through which it transfers the load from the point of application of load to the foundation and still the structure manages itself to stay flexible and self-stable.
Key Words : Transmission Tower, Tensegrity Structures, Deploybility, Form-finding, Wind Effects, Tension Stabilizers, Discontinuous Compression Members
1.INTRODUCTION With the evolution of mankind and development in science and techniques human race has reached to the far flung place which was not possible before. With increasing population and their dwelling in difficult terrain, it also became a challenge to provide them with the basic necessities of life such as Electricity, Water and other similar stuff. To transmit high-tension electricity heavy Steel towers are generally used that are very heavy and expensive. Thus, it was required to look for an alternative for conventional steel tower to bring down the expense as well as develop lightweight structures that can be easily erected to the sites that are not that easy to reach to. Tensegrity can be proved a better option for it as it is lightweight and easily deployable. Tensegrity structures are the most recent addition to the array of systems available to the designers, the concept itself is about eighty years old and it came not from within the construction industry, but from the world of arts. More often than not, "surprise" and "fascination" are the words, which convey the reactions of people who discover tensegrity systems. Despite the fact that its fundamental building blocks are
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1.1 Concept Tensegrity structures are structures based on the combination of a few simple design patterns loading members only in pure compression or pure tension, meaning the structure will only fail if the cables yield or the rods buckle preload or tensional pre-stress, which allows cables to be rigid in tension mechanical stability, which allows the members to remain in tension/compression as stress on the structure increases Because of these patterns, no structural member experiences a bending moment. This can produce
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