Seismic Aggravation in Shallow Basins in Addition to One-dimensional Site Amplification

We first classify various basin effects, as the result of sequential combinations of basic wave phenomena, into wedge effects, lens effects, and surface-wave related effects. We then investigate their contributions to the basin aggravation. Our results show that, in a shallow basin, current 1D-based...

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Bibliographic Details
Published inJournal of earthquake engineering : JEE Vol. 24; no. 9; pp. 1477 - 1499
Main Authors Zhu, Chuanbin, Riga, Evi, Pitilakis, Kyriazis, Zhang, Jian, Thambiratnam, David
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 01.09.2020
Taylor & Francis Ltd
Subjects
Aggravation Factor
Amplification
Basin Effects
Basins
Earthquake
Geological hazards
Ground motion
Seismic Hazard
Site Effects
Soil
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Summary:We first classify various basin effects, as the result of sequential combinations of basic wave phenomena, into wedge effects, lens effects, and surface-wave related effects. We then investigate their contributions to the basin aggravation. Our results show that, in a shallow basin, current 1D-based approaches to assess site effects can significantly underestimate the seismic hazard in its close-to-edge region inside the basin at spectral periods below the fundamental period of the soil column at the deepest portion of the basin. In contrast, for a deep basin, ground motions across the whole-width could be underestimated using 1D approaches.
ISSN:1363-2469
1559-808X
DOI:10.1080/13632469.2018.1472679