Analysis and Design of Transmission Line Tower with Different Bracing Systems and Base Widths to Economise the Design
摘要
The transmission tower is developed in response to the demand for altitude from ground level while dealing with high-voltage transmitting wires and insulators. Transmission line towers are a superior alternative for transmitting power from one location to another with strong electrical conductors at a satisfactory and secured distance from the base. Transmission line towers account for around 28–42% of the transmission network’s overall cost. Transmission line towers nowadays are most generally four-legged lattice towers. Three-footed lattice towers are just utilised for telecommunications, micro-waves, radio-waves, and towers supported with guy ropes; they are not engaged as transmission line towers in the power sector. They also have to withstand all natural factors, like as high winds, in addition to their weight. The major motive of this work is to perceive the most cost-effective and efficient bracing from X, V, and W. Further, the purpose of this research is to determine which bracing is the most cost-effective and efficient in the study and designing of four-legged self-standing electricity towers. Also, to economise the design, different base widths were taken viz., 8, 6.5, and 5 m with the same tower height with each bracing system. As per wind zone IV, all loads specified in IS 802 Part-1 (2015) were taken into consideration. The model under consideration is with a height of 32 m; a square bottom size of 8 m, 6.5 m, 5 m, respectively. Towers are modelled considering factors like specific height, different bracing arrangements, L-sections, and varying factors such as bottom size and wind intensity region. A comparison study is carried out in terms of displacement, moment, and steel take-off for various tower bracings. It is stated that the tower with W-bracing is a cost-effective and competent bracing option when compared to other types of bracing.