Abstract
The natural periods of vibration of the electric poles ranges from about 1.0 to 2.0 seconds, which is controlled by types of poles, electric devices mounted on the pole, and the supporting ground conditions. Earthquake motions cotaining the same range of frequency components are likely to occur at the Tokyo alluvial plain.
The authors have deviced the aseismic criteria of such structures based on the experimental simulation of typical damages, folding of pole, collapse or slant, and drop of mounted transformer.
It was confirmed analytically that electric poles would sustain without damages the earthquake input motion of 200 gals in peak accelerations..
