MISC

2019年

Detailed identification of the ground structure and estimation of the strong ground motion using microtremor observation in a village with stiff soil layers

Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019
  • E. Ito
  • ,
  • H. Kawase
  • ,
  • F. Nagashima

開始ページ
3070
終了ページ
3077

© 2019 Associazione Geotecnica Italiana, Rome, Italy. Identifying the ground structures and estimating the strong ground motions in detail is important to estimate the damage of each building, as the differences in the underground soil structures in small areas may make big differences in the extent of damage to each building after big earthquakes. In this study we chose a village in Japan, where high-frequency amplification due to relatively stiff soil layers is expected. We identified the underground soil structures of the 32 microtremor observation points by using microtremor H/V spectrum ratio, and estimated the surface ground motion of each observation point by performing earthquake response analysis of one-dimensional soil structure. We found that the PGAs were larger in the area close to the mountain than in the area along the river or near the coast, and the difference in PGAs in the village is significant while that in PGVs is marginal because of the thin soft sediments there.

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  • SCOPUS ID : 85081180969

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