高密度微動観測を用いた相模平野の表層地盤震動特性 のゾーニングに関する研究
キーワード:
surface soil structure,
microtremor observation,
predominant period,
H/V spectrum,
microzonation,
Sagami Basin
2003 年 5 巻 p. 21-26
詳細
2003 年 5 巻 p. 21-26
Sagami Plain is located in the middle part of Kanagawa Prefecture where the Sagami River is flowing down from north to south direction and flow in Sagami Bay faced to Pacific Ocean. In 1923 Great Kanto Earthquake (M7 .9), this area was seriously damaged, the ratio of destroyed wooden houses was very high, 30-80%. So, we think that it’s very important to investigate the ground shaking characteristics related to surface soil structure by using microtremor measurements for the seismic disaster mitigation taking into account the evaluation of seismic wave characteristics. In this paper, we performed the spatially dense microtremor measurements in Sagami Plain and realized the distribution of predominant period and seismic microzoning considering the characteristics of surface soils.
