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Collapse analysis of transmission tower-line system under multi-dimensional seismic excitation based on different failure criteria

YUAN Guangying;PAN Haiyang;MA Ruisheng;TIAN Li;Shaanxi Railway Institute;School of Civil Engineering, Shandong University;  
In this research, the collapse of the transmission tower-line system considering different failure criteria under multi-dimensional seismic excitations was studied. According to the practical engineering, a three-dimensional finite element model of a long span transmission tower-line system was established with the consideration of geometric and material nonlinearities by ABAQUS. The material damage and member buckling effect were adopted in the user material routine. Two element failure criteria were proposed and the collapse mechanism of the long span transmission tower-line system under three typical natural seismic excitations was investigated considering different failure criteria, respectively. The member instability, inter-segment displacement ratio and weak position of the transmission tower were studied. The analysis results could provide a reference for the seismic design of the long span transmission tower-line system.
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