ZHAO Yangkang,WANG Chen,SONG Pengyan.Effect of the Number of Cross‑sections on Seismic Response of Catenary‑type Transmission Tower Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(06):1287-1293.
ZHAO Yangkang,WANG Chen,SONG Pengyan.Effect of the Number of Cross‑sections on Seismic Response of Catenary‑type Transmission Tower Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(06):1287-1293. DOI: 10.13409/j.cnki.jdpme.20211111070.
Effect of the Number of Cross‑sections on Seismic Response of Catenary‑type Transmission Tower Structures
Transmission towers are important elements in transmission lines. In order to investigate the effect of the number of cross-sections on the nonlinear seismic response of transmission tower structures, an actual catenary-type transmission tower is considered. With the help of the OpenSees software, four three-dimensional finite element models of transmission tower structures with different numbers of cross-sections are established, considering the nonlinearity of material and geometry. To consider the influence of input ground motions, 20 far-field ground motions are selected to investigate the response characteristics of different numbers of cross-sections on the transmission tower structure. The results show that as the number of cross-sections increases,the predominant period of the transmission tower decreases and lateral-stiffness of the transmission tower increases in a way. Under the effect of large and giant earthquakes, the maximum displacement of the transmission tower structure decreases whereas the base shear force increases with increasing number of cross-sections. However, the effect on the inter-story displacement is not evident and the deformation of the structure does not exceed the limit value recommended in the current seismic code.
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