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Test and Theoretical Analysis of T-section Combined Angles' Retrofitting Scheme for Transmission Tower

In order to study the relationship between the failure mode of the transmission tower and the external load ratio, this paper designed the bearing capacity test of the scaled tower model, established the finite element model of the test tower, and compared it with the test results and verified the finite element modeling method. Based on this, a finite element model of the actual tower section is established, and its failure mode and horizontal limit are analyzed by changing the ratio of horizontal wind load to bending moment. The failure mode is carried out by using the horizontal load-bending moment correlation curve of the tower section. To evaluate the failure mode of the tower section, the bearing capacity of the inclined material and the main material are selected as the variable parameters to analyze the key coordinate points of the horizontal load-bending moment correlation curve to form a set of tower section failure evaluation methods. The results show that the finite element model of the test tower section can effectively reflect the test loading process; the bearing capacity of the inclined material and the main material bearing capacity are important factors that affect the horizontal and flexural bearing capacity of the tower section. The final evaluation method can effectively determine the weak location and weak rods of the transmission tower and clearly show the transfer path of the damage location, which can realize the rapid assessment of the wind-induced damage mode of the transmission tower.