Failure Analysis of Transmission Tower in Full-Scale Tests

With the rapid development of Ultra-High Voltage (UHV) transmission lines, it is necessary to study the performance of UHV transmission towers. First, we performed full-scale tests on a transmission tower under seven loading patterns. Then, the test results were compared with the calculation results...

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Bibliographic Details
Published in:Buildings (Basel) 2022-04, Vol.12 (4), p.389
Main Authors: Gao, Xiuyun, Yi, Rong, Zhang, Lingquan, Jiang, Xiao, Li, Jiaxiang
Format: Article
Language:English
Subjects:
Axial forces
Bolted joints
Design
design code
Failure analysis
Full scale tests
full-scale test
High voltage
joint slip
Load
Mechanical properties
Simulation
Slippage
Stiffness
Strain gauges
Tension tests
tower failure
Transmission lines
transmission tower
Transmission towers
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Summary:With the rapid development of Ultra-High Voltage (UHV) transmission lines, it is necessary to study the performance of UHV transmission towers. First, we performed full-scale tests on a transmission tower under seven loading patterns. Then, the test results were compared with the calculation results of the Chinese tower design software Transmission Tower Analysis Program (TTA), and the failure location of the tower and the stress characteristics of the key parts were studied. Finally, we discuss the influence of bolt slippage and a new joint on the tower performance, and propose some design proposals for the current Chinese code, based on the test results. The results show that a bolt slip will significantly increase the displacement of the transmission tower, but the residual displacement can correct it. The new joint design has good mechanical performance. The bracing member at the bottom of the tower leg is located at the connection of the tower leg and the foundation, and there is a significant sudden change in stiffness, which we recommend designing according to 4% of the axial force of the main members.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings12040389