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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Study on Improvement of Seismic Performance of Transmission Tower Using Viscous Damper
Author(s)
Masayuki Matsumoto1, Akira Kasai2, Taiji Mazda3, Nobuyuki Ishida4 and Yuki Ito5
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DOI:10.17265/1934-7359/2017.05.006
Affiliation(s)
1. Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan;
2. Associate Professor, Department of Civil Engineering, Kumamoto University, Kumamoto 860-8555, Japan;
3. Professor, Department of Civil Engineering, Kyushu University, Fukuoka 819-0395, Japan;
4. Japan Steel Tower Co., Ltd., Tokyo 136-0075, Japan;
5. Japan Steel Tower Co., Ltd., Fukuoka 808-0023, Japan
ABSTRACT
The earthquake resistance of transmission tower has been often discussed
from the viewpoint of reinforcing the foundation of steel tower, but there are
also few studies considering the damping characteristics of the tower. This
paper focuses on the viscous damper which has been adopted for seismic
reinforcement of bridges in recent years. The purpose of this study is to
improve the seismic performance of steel tower by giving the high damping to
the tower. We construct a single tower model considering the influence of
transmission line, and then simulate the vibration characteristics and seismic
behavior of the tower by the eigenvalue analysis and the dynamic response
analysis. The results show that the transmission tower with viscous damper can
reduce its own response effectively and drastically. This research concludes
that it is necessary to consider the extreme increase of steel tower’s response
depending on the seismic wave and the collapse of steel tower can be avoided by
using the optimum damper in the design of the transmission tower.
KEYWORDS
Dynamic analysis, earthquake, response reduction, seismic damper, transmission tower.
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