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Volume 54 Issue 2
Jun.  2019
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Article Contents
Journal of Southwest Jiaotong University  > 2019  >  54(2): 319-327.
WANG Zhisong, LIU Xinglong, WU yanjun, JIANG Peng, LI Zhengliang. Simplified Analysis of Wind-Induced Response of Transmission Tower-Line System Considering SSI Effect[J]. Journal of Southwest Jiaotong University, 2019, 54(2): 319-327. doi: 10.3969/j.issn.0258-2724.20170715
Citation: WANG Zhisong, LIU Xinglong, WU yanjun, JIANG Peng, LI Zhengliang. Simplified Analysis of Wind-Induced Response of Transmission Tower-Line System Considering SSI Effect[J]. Journal of Southwest Jiaotong University, 2019, 54(2): 319-327. doi: 10.3969/j.issn.0258-2724.20170715
shu

Simplified Analysis of Wind-Induced Response of Transmission Tower-Line System Considering SSI Effect

doi: 10.3969/j.issn.0258-2724.20170715
  • Received Date: 26 Sep 2017
  • Rev Recd Date: 19 Dec 2017
    • Available Online: 08 Oct 2018
  • Publish Date: 01 Apr 2019
    Abstract
  • Analysis and design of transmission tower is normally performed considering fixed base, however, in most cases, the foundations are not rigid. In this study, a simplified calculation model of transmission tower-line system was developed with consideration of the soil-structure interaction （SSI）, and the dynamic equation of wind vibration response was derived. Based on the proposed simplified calculation model and MATLAB program, a transmission tower-line system from an actual project was selected to conduct the analysis of the dynamic characteristics and the time domain analysis of wind vibration of transmission tower. The model was tested and analysed with three different types of soil. The results show that the RMS displacement of transmission tower increases by about 20%, the RMS acceleration is reduced by about 14% and the maximum base shear and the base bending moment decrease by about 7% and 12%, respectively, when considering the SSI effect. The displacement response of transmission tower increases, but the acceleration changes are small if the tower line coupling effect and SSI effect are considered. As the soil hardness decreases, the SSI effect is more obvious; hence, the SSI effect should not be ignored when the transmission tower is built on soft soil.

     

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