Reliability of Electric Power Transmission Systems in Seismically Active Metropolitan Tokyo: Part 2. Seismic Hazard Analysis

by Ikuo Katayama, Advanced Engineering Operation Cent, Japan,
Ikumasa Yoshida, Advanced Engineering Operation Cent, Japan,
Shirou Fukui, Advanced Engineering Operation Cent, Japan,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability


For studying the seismic reliability of a power transmission system of Metropolitan Tokyo, the seismic hazard analysis of Kanto district was performed based on a three dimensionally distributed seismic source model and the attenuation curves reflecting the effect of focal depths on the peak ground motions. The attenuation curves were derived for peak ground velocities and accelerations by using appropriately corrected and selected Japanese strong motion records. Assuming Poisson process of occurrence of earthquakes, the seismic hazard of the Metropolitan area was presented by contour maps of the expected peak ground velocity and acceleration for a representative exposure time applicable to both on surface and under ground structures.

Subject Headings: Seismic tests | Seismic waves | Seismic effects | Power transmission | Urban areas | Electric power | Wave attenuation | Japan | Asia

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