Comparative Study to Optimize Transmission Line Tower with Hot Rolled and Cold Form Section

Abstract

Electricity is a major source of power for industries, commercial and residential use. Due to rapid growth in industrial area and because of infrastructure development, the need for electricity increases. Due to diverse requirement of electricity across the country and far away locations of power plants, a grid of electric transmission line is required to cover the entire country. The transmission line towers cost about 35 to 45% of the total cost of the transmission line. The increasing demand for electrical energy can be met more economical by developing different light weight configuration of transmission line towers. In past, major study is focused on analysis and design of towers for different self-supporting base of angle sections. Less work is done in the field of minimizing weight of transmission line tower. Also, less literature is available on transmission line tower with cold form sections. Analysis of transmission line tower carried out as per standard codes, also comparative study is carried on the basis of different types of bracing systems (warren, horizontal, diagonal, diamond) and materials such as hot rolled and cold form sections. By designing transmission line tower with hot rolled and cold form sections using STAAD Pro, hot rolled sections gives light weight design. Cold form sections fail to carry load in leg part of tower. Detailed analysis of failure modes was carried out in ANSYS Software. It is observed that cold form is not feasible for transmission line tower.