Mechanical characteristics and form-finding analysis of iced transmission lines

Yuejun Liu, Aiping Tang, Ketong Liu, Jiewen Tu

SchoolofCivilEngineering,HarbinInstituteofTechnology,Harbin,Heilongjiangprovince,China

Form-finding is the important problem to be solved in the cable structure analysis, to the different forms of loads, the direct iterative method is used to determine the initial configuration of the cable structures. Horizontal tension or cable tension is used as iterative convergence condition, the form-finding of the cable is researched under its own gravity, uniform ice and non-uniform ice load. As for the multi-span transmission lines, two conditions of uniform ice and non-uniform ice loads on the whole span were analysed. The results of initial configuration are consistent with the analytical method, which verified the correctness of the direct iterative method, under the condition of non-uniform ice load, the stress of conductor is larger than the maximum stress, which is very dangerous in the actual operation.