ABSTRACT
Over the past few decades, the advent of powerful digital computers, advances in numerical modeling of various climactic phenomena and newer materials have been facilitating accurate and rational analysis of transmission lines, structures and foundations. Programs such as PLS-CADD™ are enabling modeling and design of long, multi-circuit transmission lines with hundreds of structures (poles, frames and towers), miles of conductors and dozens of combinations of load cases. On the theoretical side, significant research is being conducted into the mathematical modeling of poles, cables, foundations, complex loading situations including seismic and high intensity wind events. Strong and durable composite materials were developed to provide a viable alternative to wood and steel along with special-purpose conductors to meet specific performance needs.
