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Earthquakes and Structures
  Volume 16, Number 5, May 2019, pages 513-522
DOI: http://dx.doi.org/10.12989/eas.2019.16.5.513
 


Experimental and numerical study on the collapse failure of long-span transmission tower-line systems subjected to extremely severe earthquakes
Li Tian, Zhaoyang Fu, Haiyang Pan, Ruisheng Ma and Yuping Liu

 
Abstract
    A long-span transmission tower-line system is indispensable for long-distance electricity transmission across a large river or valley; hence, the failure of this system, especially the collapse of the supporting towers, has serious impacts on power grids. To ensure the safety and reliability of transmission systems, this study experimentally and numerically investigates the collapse failure of a 220 kV long-span transmission tower-line system subjected to severe earthquakes. A 1:20 scale model of a transmission tower-line system is constructed in this research, and shaking table tests are carried out. Furthermore, numerical studies are conducted in ABAQUS by using the Tian-Ma-Qu material model, the results of which are compared with the experimental findings. Good agreement is found between the experimental and numerical results, showing that the numerical simulation based on the Tian-Ma-Qu material model is able to predict the weak points and collapse process of the long-span transmission tower-line system. The failure of diagonal members at weak points constitutes the collapse-inducing factor, and the ultimate capacity and weakest segment vary with different seismic wave excitations. This research can further enrich the database for the seismic performance of long-span transmission tower-line systems.
 
Key Words
    long-span transmission tower-line system; failure; severe earthquakes; scale model; shaking table tests, numerical studies
 
Address
Li Tian, Zhaoyang Fu, Haiyang Pan, Ruisheng Ma and Yuping Liu: School of Civil Engineering, Shandong University, Jinan, Shandong Province 250061, China
 

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