Research On Safety Probabilistic Evaluation Method Of Transmission Tower Structural Performance

The transmission tower is an important supporting structure of the transmission line,and itself is a complex structural system.Due to the special operating environment,its structural safety may be affected by many uncertain factors,and various types of faults will occur in different degrees,resulting in diffe rent degrees of economic losses and security threats.Therefore,it is of great theoretical value and engineering significance to study the safety assessment of the structural performance of transmission towers for improving the operation and maintenance l evel of transmission lines.This paper mainly considers the influence of uncertain factors in the operation of transmission towers,and the research content mainly focuses on the safety evaluation method of transmission towers,and based on this,the safet y probability evaluation method is introduced.That is,the corresponding safety probability is obtained while the safety level of the transmission tower is obtained,which provides more reference information for the operation and maintenance of the transmission tower.This paper studies from the following points:(1)Based on the relevant standards of transmission tower state assessment and referring to relevant literature,the evaluation indicators that have an impact on the safety state of transmission tower structural performance are selected,and the corresponding index scoring standards and the classification standard of transmission tower structural performance safety state are determined.Establish an evaluation index system for the structural performance of transmission towers.(2)Considering the influence of transmission tower evaluation indicators on the structural performance of transmission towers,the subjective weight,objective weight and comprehensive weight of the evaluation indicators of t ransmission tower structural performance are determined by using the analytic hierarchy process,the entropy weight method and the combined weighting method based on Game Theory.(3)Considering the randomness of the evaluation indexes of transmission towe rs,a probabilistic evaluation method for structural performance safety of transmission towers is proposed.The safety level and safety probability of the structural performance of the transmission tower are obtained.(4)The feasibility and reliability of the proposed method for safety probabilistic evaluation method of transmission tower structural performance studied in this paper are verified through the evaluation of a linear tower and a tensile tower.And through the evaluation and analysis of the transmission tower in the tension section of the transmission line,the reference significance of this method to the operation and maintenance decision-making is shown.