Analysis of the Quasi-Static Buffeting Responses of Transmission Lines to Moving Downburst

摘要

Downburst event is identi fi ed as a major cause to failure of transmis- sion lines in non -coastal regions. In this paper, a novel nonlinear analytical frame for quasi -static buffeting responses of hinged and multi -span insulator -line sys- tems are derived based on the theory of cable structure. The closed -form solutions are presented and applied to predict nonlinear response including displacements and other reactions of the system subjected to a moving downburst wind in a case study. Accuracy and efficiency of the derived analytical frame are validated via comparisons with results from fi nite element method.