NUMERICAL SIMULATIONS ON DYNAMIC RESPONSES OF A TRANSMISSION TOWER-CONDUCTOR COUPLING SYSTEM UNDER EARTHQUAKE ACTION

BU Xianghang; CAO Yongxing; LIANG Huangbin; ZHU Jun; WU Chi; LIU Fenglian; XIE Qiang

doi:10.13204/j.gyjzG201908200007

Volume 50 Issue 8

Oct. 2020

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BU Xianghang, CAO Yongxing, LIANG Huangbin, ZHU Jun, WU Chi, LIU Fenglian, XIE Qiang. NUMERICAL SIMULATIONS ON DYNAMIC RESPONSES OF A TRANSMISSION TOWER-CONDUCTOR COUPLING SYSTEM UNDER EARTHQUAKE ACTION[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(8): 128-133. doi: 10.13204/j.gyjzG201908200007

Citation:

BU Xianghang, CAO Yongxing, LIANG Huangbin, ZHU Jun, WU Chi, LIU Fenglian, XIE Qiang. NUMERICAL SIMULATIONS ON DYNAMIC RESPONSES OF A TRANSMISSION TOWER-CONDUCTOR COUPLING SYSTEM UNDER EARTHQUAKE ACTION[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(8): 128-133. doi: 10.13204/j.gyjzG201908200007

Citation:

BU Xianghang, CAO Yongxing, LIANG Huangbin, ZHU Jun, WU Chi, LIU Fenglian, XIE Qiang. NUMERICAL SIMULATIONS ON DYNAMIC RESPONSES OF A TRANSMISSION TOWER-CONDUCTOR COUPLING SYSTEM UNDER EARTHQUAKE ACTION[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(8): 128-133. doi: 10.13204/j.gyjzG201908200007

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NUMERICAL SIMULATIONS ON DYNAMIC RESPONSES OF A TRANSMISSION TOWER-CONDUCTOR COUPLING SYSTEM UNDER EARTHQUAKE ACTION

doi: 10.13204/j.gyjzG201908200007

1. Sichuan Electrical Power Research Institute of SGCC, Chengdu 610041, China;
2. Department of Structural Engineering, Tongji University, Shanghai 200092, China;
3. Key Laboratory of Performance Evolution and Control for Engineering Structures, Ministry of Education, Shanghai 200092, China

Received Date: 2020-03-20

Abstract

Abstract

Electricity transmission lines consists of transmission tower structure and conductors as well as ground wires. Coupling effects of the system are prominent. In order to study the influence of transmission lines on transmission tower under earthquake actions, two finite element models were established based on a 220 kV transmission project, including a single tower model and a tower-line coupling model. Dynamic characteristics analysis and seismic time history analysis were carried out for the two models. By comparing the results of the two models, it can be found that the frequency of transmission tower in the tower-line coupling model was less than that of single tower model. Seismic responses of the transmission tower in the tower-line coupling model with low seismic intensity was higher than that of the single tower model, while the result could be the opposite with high seismic intensity. The mass of transmission lines would amplify the seismic responses of transmission tower, while the nonlinear vibration of them could also dissipate some seismic energy, thus reducing the seismic responses of transmission tower. The nonlinear energy dissipation effects would become more and more obvious with the increase of seismic input intensity.
- tower-line coupling system model,
- single tower model,
- seismic responses,
- nonlinearity,
- energy dissipation effect

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References(24)

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