| 摘要 |
PROBLEM TO BE SOLVED: To estimate a secondary electric pole breakage number with high accuracy from prediction of building damage considering the ground condition of a target area, and to estimate the number of outage houses accompanying the breakage of electric poles with high accuracy. SOLUTION: Correlation between ground surface maximum velocity expressing intensity of earthquake motion and a building complete collapse rate that is a ratio of a completely collapsed building by an earthquake is previously obtained based on damage investigation of a past earthquake, and correlation between the building complete collapse rate and an electric pole breakage rate that is a ratio of the electric pole having suffered breakage damage is previously obtained. The ground surface maximum velocity is calculated from an acceleration response spectrum of the ground surface by the earthquake motion, the building complete collapse rate to the ground surface maximum velocity is obtained from the correlation between the ground surface maximum velocity and the building complete collapse rate, the electric pole breakage rate to the building complete collapse rate is obtained from the correlation between the building complete collapse rate and the electric pole breakage rate, and the secondary damage breakage number is estimated from an expression of the secondary damage breakage number = (an electric pole cardinal number - a burnout number)×the electric pole breakage rate with the number of the electric poles placed inside a mesh as the electric pole cardinal number. COPYRIGHT: (C)2008,JPO&INPIT
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