COMPARISON BETWEEN GROUND-MOTION CHARACTERISTICS ON PLATEAU AND LOWLAND SITES BASED ON STRONG-MOTION AND MICROTREMOR OBSERVATIONS

• TOSHINAWA Takumi

  THE JAPAN SOCIETY OF CIVIL ENGINEERS

• YAMAZAKI Hiroaki

  THE JAPAN SOCIETY OF CIVIL ENGINEERS

Bibliographic Information

Other Title

• 地震観測・常時微動観測に基づくローム台地と沖積低地の地盤震動特性の比較
• ジシン カンソク ジョウジ ビドウ カンソク ニ モトヅク ローム ダイチ ト チュウセキ テイチ ノ ジバン シンドウ トクセイ ノ ヒカク

Abstract

Strong-motion and microtremor observations are carried out in loam plateaus and Holocene lowlands in the Hassaku area, Yokohama, to investigate site-amplification characteristics in the area. Strong-motion observations show that a plateau site has larger site-amplification characteristics in comparison to lowland sites by a factor of about 1.5 in peak horizontal ground velocity and about 2 in spectral peak amplitude of Fourier acceleration spectra. The amplification is due to subsurface soils which are accumulated on soft rocks. Microtremor observations demonstrate that resonance periods on plateaus are related to elevation; high site amplification areas distribute along rivers in the lowlands and on the Shimosueyoshi plateau.

Journal

• Doboku Gakkai Ronbunshu

  Doboku Gakkai Ronbunshu 1999 (612), 265-274, 1999-01-21

  Japan Society of Civil Engineers

Keywords

• plateau
• lowland
• site-amplification
• strong-motion observation
• microtremor observation

Details

• CRID: 1390282680285262720
• NII Article ID: 10002527150
• NII Article ID: 130003801330
• NII Book ID: AN10014020
• DOI: 10.2208/jscej.1999.612_265
• ISSN: 18827187
• ISSN: 02897806
• NDL BIB ID: 4641507
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4641507
• Web Site: https://www.jstage.jst.go.jp/article/jscej1984/1999/612/1999_612_265/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed