This paper describes dynamic characteristics of a power transmission tower consisting of lots of power lines and insulators. A numerical 3D modeling for the static, dynamic and buckling analyses of the power transmission tower is presented considering the case when the power lines are cut. Eigenvalue analysis indicates that the transmission tower shows different behavior comparing to usual structures governed by several low modes. The transmission tower is governed by lots of modes. It is verified that the transmission tower is structurally safe against the static wind and buckling loads. But the structural and buckling safety is not guaranteed when all power lines are cut, which comes to collapse the transmission tower. Further study is in need to overcome such case. Wind dynantic analysis shows that fluctuating wind loads increase the response of the tower.

• 박지훈(단국대학교 리모델링연구소 연구전임강사, 공학박사) | Park, Ji-Hun Corresponding author
• 문병욱(단국대학교 대학원 건축공학과 석사과정) | Moon, Byoung-Wook
• 민경원(단국대학교 건축대학 건축공학과 부교수, 공학박사) | Min, Kyung-Won