EFFECTS OF EARTHQUAKE DURATION ON RESPONSE OF AN OVERHEAD TRANSMISSION LINE

Abstract

 This paper discussed effects of earthquake duration on responses of an overhead transmission line. For this purpose, nonlinear analyses were conducted. An analysis target was the overhead transmission line which has three towers with 77.5m in height and four spans whose length between each towers were equal to 450m, reapectively. Three types of ground accelerations were selected as analysis inputs in order to investigate effects of earthquake duration. A number of cycles and a long period component were focused as the characteristics of earthquake duration. Analytical results demonstrated that the long period component of the earthquake increased the maxmim displacement of cables while tower responses were not affected by the earthquake duration.