2008 Volume 64 Issue 1 Pages 142-155
In recent years, high-voltage transmission towers received severe damage due to typhoon and earthquake in Japan. Steel pipes for transmission towers have radius-to-thickness ratio of 10-25, and slenderness ratio of 20-80, and belong to relatively thick cylinders. Transmission towers have been considered to be designed with enough wind-resistance performance, however, it is necessary to reexamine the current estimation methods from the point of load carrying capacity to improve the structural integrity. The purpose of this paper is to investigate the buckling strength of the steel pipes for main leg members of transmission towers experimentally and analytically, and to provide the buckling strength estimation formulae under eccentrically axial compression. Furthermore, coefficient of effective buckling length of main leg members is investigated and the possibility that conventional value can be rationalized is clarified.
Proceedings of the JSCE Earthquake Engineering Symposium
Environmental systems research
