ANALYSIS AND ECONOMICAL DESIGN OF TRANSMISSION LINE TOWERS OF DIFFERENT CONFIGURATIONS SUBJECTED TO WIND LOAD

Transmission Line Towers represent approximately 28 to 42 percent of the cost of the transmission line. The growing demand for electrical energy can be met more economically through developing exceptional mild weight configurations of transmission line towers. I the present work, an attempt have been made to make the transmission line price effective through converting the geometry (form) and behavior (type) of transmission line structure. The main objective of our study is to design a 220 KV single Circuit Transmission Line carrying rectangular Base Self supporting Towers, which optimize the present geometry, such a suspension towers is replaced by Triangular Base Self supporting Tower. Then, the structural behavior of existing tower is studied with the aid of developing rectangular Base Guyed Mast. Excel programs are developed together with AutoCAD for configuring towers and calculating loading. By using STAAD.pro, evaluation of each of those 3 towers has been executed in a three dimensional systems. Then, the tower members are designed as ISA angle sections. For optimizing any member phase, the whole wind load computations must be repeated, simultaneously the analysis and again the design. Hence, three successive iterations had been carried out earlier arriving at the inexpensive designs of square base and triangular base self supporting towers and the square form guyed mast. Then all the3 towers are compared and analyzed.